Red Hat Enterprise Linux 9.3
9.3 Release Notes
Release Notes for Red Hat Enterprise Linux 9.3
Last Updated: 2024-09-11
Red Hat Enterprise Linux 9.3 9.3 Release Notes
Release Notes for Red Hat Enterprise Linux 9.3
Legal Notice
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Abstract
The Release Notes provide high-level coverage of the improvements and additions that have been
implemented in Red Hat Enterprise Linux 9.3 and document known problems in this release, as well
as notable bug fixes, Technology Previews, deprecated functionality, and other details. For
information about installing Red Hat Enterprise Linux, see Installation.
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Table of Contents
PROVIDING FEEDBACK ON RED HAT DOCUMENTATION
CHAPTER 1. OVERVIEW
1.1. MAJOR CHANGES IN RHEL 9.3
Installer and image creation
1.1.1. Bootloader
RHEL for Edge
Security
Dynamic programming languages, web and database servers
Compilers and development tools
Updated system toolchain
Updated performance tools and debuggers
Updated performance monitoring tools
Updated compiler toolsets
Java implementations in RHEL 9
1.2. IN-PLACE UPGRADE
In-place upgrade from RHEL 8 to RHEL 9
In-place upgrade from RHEL 7 to RHEL 9
1.3. RED HAT CUSTOMER PORTAL LABS
1.4. ADDITIONAL RESOURCES
CHAPTER 2. ARCHITECTURES
CHAPTER 3. DISTRIBUTION OF CONTENT IN RHEL 9
3.1. INSTALLATION
3.2. REPOSITORIES
3.3. APPLICATION STREAMS
3.4. PACKAGE MANAGEMENT WITH YUM/DNF
CHAPTER 4. NEW FEATURES
4.1. INSTALLER AND IMAGE CREATION
4.2. SECURITY
4.3. RHEL FOR EDGE
4.4. SOFTWARE MANAGEMENT
4.5. SHELLS AND COMMAND-LINE TOOLS
4.6. INFRASTRUCTURE SERVICES
4.7. NETWORKING
4.8. KERNEL
4.9. BOOT LOADER
4.10. FILE SYSTEMS AND STORAGE
4.11. HIGH AVAILABILITY AND CLUSTERS
4.12. DYNAMIC PROGRAMMING LANGUAGES, WEB AND DATABASE SERVERS
4.13. COMPILERS AND DEVELOPMENT TOOLS
4.14. IDENTITY MANAGEMENT
4.15. GRAPHICS INFRASTRUCTURES
4.16. THE WEB CONSOLE
4.17. RED HAT ENTERPRISE LINUX SYSTEM ROLES
4.18. VIRTUALIZATION
4.19. RHEL IN CLOUD ENVIRONMENTS
4.20. SUPPORTABILITY
4.21. CONTAINERS
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CHAPTER 5. IMPORTANT CHANGES TO EXTERNAL KERNEL PARAMETERS
New kernel parameters
Updated kernel parameters
Removed kernel parameters
CHAPTER 6. DEVICE DRIVERS
6.1. NEW DRIVERS
Network drivers
Graphics drivers and miscellaneous drivers
6.2. UPDATED DRIVERS
Network driver updates
Storage driver updates
CHAPTER 7. AVAILABLE BPF FEATURES
CHAPTER 8. BUG FIXES
8.1. INSTALLER AND IMAGE CREATION
8.2. SECURITY
8.3. SUBSCRIPTION MANAGEMENT
8.4. SOFTWARE MANAGEMENT
8.5. SHELLS AND COMMAND-LINE TOOLS
8.6. NETWORKING
8.7. KERNEL
8.8. BOOT LOADER
8.9. FILE SYSTEMS AND STORAGE
8.10. HIGH AVAILABILITY AND CLUSTERS
8.11. COMPILERS AND DEVELOPMENT TOOLS
8.12. IDENTITY MANAGEMENT
8.13. THE WEB CONSOLE
8.14. RED HAT ENTERPRISE LINUX SYSTEM ROLES
8.15. VIRTUALIZATION
CHAPTER 9. TECHNOLOGY PREVIEWS
9.1. INSTALLER AND IMAGE CREATION
9.2. SECURITY
9.3. SHELLS AND COMMAND-LINE TOOLS
9.4. INFRASTRUCTURE SERVICES
9.5. NETWORKING
9.6. KERNEL
9.7. FILE SYSTEMS AND STORAGE
9.8. COMPILERS AND DEVELOPMENT TOOLS
9.9. IDENTITY MANAGEMENT
9.10. DESKTOP
9.11. VIRTUALIZATION
9.12. RHEL IN CLOUD ENVIRONMENTS
9.13. CONTAINERS
CHAPTER 10. DEPRECATED FUNCTIONALITY
10.1. INSTALLER AND IMAGE CREATION
10.2. SECURITY
10.3. SUBSCRIPTION MANAGEMENT
10.4. SHELLS AND COMMAND-LINE TOOLS
10.5. NETWORKING
10.6. KERNEL
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Red Hat Enterprise Linux 9.3 9.3 Release Notes
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10.7. FILE SYSTEMS AND STORAGE
10.8. DYNAMIC PROGRAMMING LANGUAGES, WEB AND DATABASE SERVERS
10.9. COMPILERS AND DEVELOPMENT TOOLS
10.10. IDENTITY MANAGEMENT
10.11. DESKTOP
10.12. GRAPHICS INFRASTRUCTURES
10.13. RED HAT ENTERPRISE LINUX SYSTEM ROLES
10.14. VIRTUALIZATION
10.15. CONTAINERS
10.16. DEPRECATED PACKAGES
CHAPTER 11. KNOWN ISSUES
11.1. INSTALLER AND IMAGE CREATION
11.2. SECURITY
11.3. RHEL FOR EDGE
11.4. SOFTWARE MANAGEMENT
11.5. SHELLS AND COMMAND-LINE TOOLS
11.6. INFRASTRUCTURE SERVICES
11.7. NETWORKING
11.8. KERNEL
11.9. FILE SYSTEMS AND STORAGE
11.10. DYNAMIC PROGRAMMING LANGUAGES, WEB AND DATABASE SERVERS
11.11. IDENTITY MANAGEMENT
11.12. DESKTOP
11.13. GRAPHICS INFRASTRUCTURES
11.14. RED HAT ENTERPRISE LINUX SYSTEM ROLES
11.15. VIRTUALIZATION
11.16. RHEL IN CLOUD ENVIRONMENTS
11.17. SUPPORTABILITY
11.18. CONTAINERS
APPENDIX A. LIST OF TICKETS BY COMPONENT
APPENDIX B. REVISION HISTORY
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Table of Contents
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Red Hat Enterprise Linux 9.3 9.3 Release Notes
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PROVIDING FEEDBACK ON RED HAT DOCUMENTATION
We appreciate your feedback on our documentation. Let us know how we can improve it.
Submitting feedback through Jira (account required)
1. Log in to the Jira website.
2. Click Create in the top navigation bar
3. Enter a descriptive title in the Summary field.
4. Enter your suggestion for improvement in the Description field. Include links to the relevant
parts of the documentation.
5. Click Create at the bottom of the dialogue.
PROVIDING FEEDBACK ON RED HAT DOCUMENTATION
5
CHAPTER 1. OVERVIEW
1.1. MAJOR CHANGES IN RHEL 9.3
Installer and image creation
Key highlights for image builder:
Enhancement to the AWS EC2 AMD or Intel 64-bit architecture AMI image to support UEFI
boot, in addition to the legacy BIOS boot.
For more information, see New features - Installer and image creation .
1.1.1. Bootloader
New default behavior of grub2-mkconfig with BLS
With this release, the grub2-mkconfig command no longer overwrites the kernel command line in Boot
Loader Specification (BLS) snippets with GRUB_CMDLINE_LINUX by default. Each kernel in the boot
loader menu takes its kernel command line from its BLS snippet. This new default behavior is caused by
the GRUB_ENABLE_BLSCFG=true option.
For details, see New features in Bootloader.
RHEL for Edge
Key highlights for RHEL for Edge:
Support added to the following image types:
minimal-raw
edge-vsphere
edge-ami
New FIDO Device Onboarding Servers container images available
rhel9/fdo-manufacturing-server
rhel9/fdo-owner-onboarding-server
rhel9/fdo-rendezvous-server
rhel9/fdo-serviceinfo-api-server
For more information, see New features - RHEL for Edge .
Security
Key security-related highlights:
Keylime was rebased to version 7.3.0.
The keylime RHEL System Role is available. With this role, you can more easily configure the
Keylime verifier and Keylime registrar.
OpenSSH was migrated further from the less secure SHA-1 message digest for cryptographic
purposes, and instead applies the more secure SHA-2 in additional scenarios.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
6
The pcsc-lite-ccid USB Chip/Smart Card Interface Device(CCID)) and Integrated Circuit Card
Device (ICCD) driver was rebased to version 1.5.2.
RHEL 9.3 introduces further improvements to support the Extended Master Secret (EMS)
extension (RFC 7627) required by the FIPS-140-3 standard for all TLS 1.2 connections.
SEtools, the collection of graphical tools, command-line tools, and libraries for SELinux policy
analysis, was rebased to version 4.4.3.
OpenSCAP was rebased to version 1.3.8.
SCAP Security Guide was rebased to version 0.1.69, most notably:
ANSSI profiles were updated to version 2.0.
Three new SCAP profiles were added for RHEL 9 aligned with the CCN-STIC-610A22
Guide.
See New features - Security for more information.
Dynamic programming languages, web and database servers
Later versions of the following Application Streams are now available:
Redis 7
Node.js 20
In addition, the Apache HTTP Server has been updated to version 2.4.57.
See New features - Dynamic programming languages, web and database servers for more information.
Compilers and development tools
Updated system toolchain
The following system toolchain component has been updated in RHEL 9.3:
GCC 11.4.1
Updated performance tools and debuggers
The following performance tools and debuggers have been updated in RHEL 9.3:
Valgrind 3.21
SystemTap 4.9
elfutils 0.189
Updated performance monitoring tools
The following performance monitoring tools have been updated in RHEL 9.3:
PCP 6.0.5
Grafana 9.2.10
Updated compiler toolsets
The following compiler toolsets have been updated in RHEL 9.3:
GCC Toolset 13 (new)
CHAPTER 1. OVERVIEW
7
LLVM Toolset 16.0.6
Rust Toolset 1.71.1
Go Toolset 1.20.10
For detailed changes, see New features - Compilers and development tools .
Java implementations in RHEL 9
The RHEL 9 AppStream repository includes:
The java-21-openjdk packages, which provide the OpenJDK 21 Java Runtime Environment and
the OpenJDK 21 Java Software Development Kit. An OpenJDK 21.0.1 security release is also
available to install. It is recommended that you install the OpenJDK 21.0.1 update to acquire the
latest security fixes.
The java-17-openjdk packages, which provide the OpenJDK 17 Java Runtime Environment and
the OpenJDK 17 Java Software Development Kit.
The java-11-openjdk packages, which provide the OpenJDK 11 Java Runtime Environment and
the OpenJDK 11 Java Software Development Kit.
The java-1.8.0-openjdk packages, which provide the OpenJDK 8 Java Runtime Environment
and the OpenJDK 8 Java Software Development Kit.
The Red Hat build of OpenJDK packages share a single set of binaries between its portable Linux
releases and RHEL 9.3 and later releases. With this update, there is a change in the process of rebuilding
the OpenJDK packages on RHEL from the source RPM. For more information about the new rebuilding
process, see the README.md file which is available in the SRPM package of the Red Hat build of
OpenJDK and is also installed by the java-*-openjdk-headless packages under the /usr/share/doc tree.
For more information, see OpenJDK documentation.
1.2. IN-PLACE UPGRADE
In-place upgrade from RHEL 8 to RHEL 9
The supported in-place upgrade paths currently are:
From RHEL 8.6 to RHEL 9.0, RHEL 8.8 to RHEL 9.2, and RHEL 8.9 to RHEL 9.3 on the following
architectures:
64-bit Intel
64-bit AMD
64-bit ARM
IBM POWER 9 (little endian)
IBM Z architectures, excluding z13
From RHEL 8.6 to RHEL 9.0 and RHEL 8.8 to RHEL 9.2 on systems with SAP HANA
For more information, see Supported in-place upgrade paths for Red Hat Enterprise Linux .
For instructions on performing an in-place upgrade, see Upgrading from RHEL 8 to RHEL 9 .
If you are upgrading to RHEL 9.2 with SAP HANA, ensure that the system is certified for SAP before the
Red Hat Enterprise Linux 9.3 9.3 Release Notes
8
If you are upgrading to RHEL 9.2 with SAP HANA, ensure that the system is certified for SAP before the
upgrade. For instructions on performing an in-place upgrade on systems with SAP environments, see
How to in-place upgrade SAP environments from RHEL 8 to RHEL 9 .
Notable enhancements include:
Requirements on disk space have been significantly reduced on systems with XFS filesystems
formatted with ftype=0.
Disk images created during the upgrade process for upgrade purposes now have dynamic sizes.
The LEAPP_OVL_SIZE environment variable is not needed anymore.
Issues with the calculation of the required free space on existing disk partitions have been fixed.
The missing free disk space is now correctly detected before the required reboot of the system,
and the report correctly displays file systems that do not have enough free space to proceed
the upgrade RPM transaction.
Third-party drivers can now be managed during the in-place upgrade process using custom
leapp actors.
An overview of the pre-upgrade and upgrade reports is now printed in the terminal.
Upgrades of RHEL Real Time and RHEL Real Time for Network Functions Virtualization (NFV) in
Red Hat OpenStack Platform are now supported.
In-place upgrade from RHEL 7 to RHEL 9
It is not possible to perform an in-place upgrade directly from RHEL 7 to RHEL 9. However, you can
perform an in-place upgrade from RHEL 7 to RHEL 8 and then perform a second in-place upgrade to
RHEL 9. For more information, see Upgrading from RHEL 7 to RHEL 8 .
1.3. RED HAT CUSTOMER PORTAL LABS
Red Hat Customer Portal Labs is a set of tools in a section of the Customer Portal available at
https://access.redhat.com/labs/. The applications in Red Hat Customer Portal Labs can help you
improve performance, quickly troubleshoot issues, identify security problems, and quickly deploy and
configure complex applications. Some of the most popular applications are:
Registration Assistant
Kickstart Generator
Red Hat Product Certificates
Red Hat CVE Checker
Kernel Oops Analyzer
Red Hat Code Browser
VNC Configurator
Red Hat OpenShift Container Platform Update Graph
Red Hat Satellite Upgrade Helper
JVM Options Configuration Tool
CHAPTER 1. OVERVIEW
9
Load Balancer Configuration Tool
Red Hat OpenShift Data Foundation Supportability and Interoperability Checker
Ansible Automation Platform Upgrade Assistant
Ceph Placement Groups (PGs) per Pool Calculator
1.4. ADDITIONAL RESOURCES
Capabilities and limits of Red Hat Enterprise Linux 9 as compared to other versions of the system are
available in the Knowledgebase article Red Hat Enterprise Linux technology capabilities and limits .
Information regarding the Red Hat Enterprise Linux life cycle is provided in the Red Hat Enterprise
Linux Life Cycle document.
The Package manifest document provides a package listing for RHEL 9, including licenses and
application compatibility levels.
Application compatibility levels are explained in the Red Hat Enterprise Linux 9: Application
Compatibility Guide document.
Major differences between RHEL 8 and RHEL 9, including removed functionality, are documented in
Considerations in adopting RHEL 9 .
Instructions on how to perform an in-place upgrade from RHEL 8 to RHEL 9 are provided by the
document Upgrading from RHEL 8 to RHEL 9 .
The Red Hat Insights service, which enables you to proactively identify, examine, and resolve known
technical issues, is available with all RHEL subscriptions. For instructions on how to install the Red Hat
Insights client and register your system to the service, see the Red Hat Insights Get Started page.
NOTE
Public release notes include links to access the original tracking tickets, but private
release notes are not viewable so do not include links.
[1]
[1]
Public release notes include links to access the original tracking tickets, but private release notes are not
viewable so do not include links.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
10
CHAPTER 2. ARCHITECTURES
Red Hat Enterprise Linux 9.3 is distributed with the kernel version 5.14.0-362.8.1, which provides support
for the following architectures at the minimum required version (stated in parentheses):
AMD and Intel 64-bit architectures (x86-64-v2)
The 64-bit ARM architecture (ARMv8.0-A)
IBM Power Systems, Little Endian (POWER9)
64-bit IBM Z (z14)
Make sure you purchase the appropriate subscription for each architecture. For more information, see
Get Started with Red Hat Enterprise Linux - additional architectures .
CHAPTER 2. ARCHITECTURES
11
CHAPTER 3. DISTRIBUTION OF CONTENT IN RHEL 9
3.1. INSTALLATION
Red Hat Enterprise Linux 9 is installed using ISO images. Two types of ISO image are available for the
AMD64, Intel 64-bit, 64-bit ARM, IBM Power Systems, and IBM Z architectures:
Installation ISO: A full installation image that contains the BaseOS and AppStream repositories
and allows you to complete the installation without additional repositories. On the Product
Downloads page, the Installation ISO is referred to as Binary DVD.
NOTE
The Installation ISO image is in multiple GB size, and as a result, it might not fit on
optical media formats. A USB key or USB hard drive is recommended when using
the Installation ISO image to create bootable installation media. You can also use
the Image Builder tool to create customized RHEL images. For more information
about Image Builder, see the Composing a customized RHEL system image
document.
Boot ISO: A minimal boot ISO image that is used to boot into the installation program. This
option requires access to the BaseOS and AppStream repositories to install software packages.
The repositories are part of the Installation ISO image. You can also register to Red Hat CDN or
Satellite during the installation to use the latest BaseOS and AppStream content from Red Hat
CDN or Satellite.
See the Performing a standard RHEL 9 installation document for instructions on downloading ISO
images, creating installation media, and completing a RHEL installation. For automated Kickstart
installations and other advanced topics, see the Performing an advanced RHEL 9 installation document.
3.2. REPOSITORIES
Red Hat Enterprise Linux 9 is distributed through two main repositories:
BaseOS
AppStream
Both repositories are required for a basic RHEL installation, and are available with all RHEL
subscriptions.
Content in the BaseOS repository is intended to provide the core set of the underlying operating
system functionality that provides the foundation for all installations. This content is available in the
RPM format and is subject to support terms similar to those in previous releases of RHEL. For more
information, see the Scope of Coverage Details document.
Content in the AppStream repository includes additional user-space applications, runtime languages,
and databases in support of the varied workloads and use cases.
In addition, the CodeReady Linux Builder repository is available with all RHEL subscriptions. It provides
additional packages for use by developers. Packages included in the CodeReady Linux Builder
repository are unsupported.
For more information about RHEL 9 repositories and the packages they provide, see the Package
Red Hat Enterprise Linux 9.3 9.3 Release Notes
12
For more information about RHEL 9 repositories and the packages they provide, see the Package
manifest.
3.3. APPLICATION STREAMS
Multiple versions of user-space components are delivered as Application Streams and updated more
frequently than the core operating system packages. This provides greater flexibility to customize RHEL
without impacting the underlying stability of the platform or specific deployments.
Application Streams are available in the familiar RPM format, as an extension to the RPM format called
modules, as Software Collections, or as Flatpaks.
Each Application Stream component has a given life cycle, either the same as RHEL 9 or shorter. For
RHEL life cycle information, see Red Hat Enterprise Linux Life Cycle .
RHEL 9 improves the Application Streams experience by providing initial Application Stream versions
that can be installed as RPM packages using the traditional dnf install command.
NOTE
Certain initial Application Streams in the RPM format have a shorter life cycle than Red
Hat Enterprise Linux 9.
Some additional Application Stream versions will be distributed as modules with a shorter life cycle in
future minor RHEL 9 releases. Modules are collections of packages representing a logical unit: an
application, a language stack, a database, or a set of tools. These packages are built, tested, and
released together.
Always determine what version of an Application Stream you want to install and make sure to review the
Red Hat Enterprise Linux Application Stream Lifecycle first.
Content that needs rapid updating, such as alternate compilers and container tools, is available in rolling
streams that will not provide alternative versions in parallel. Rolling streams may be packaged as RPMs
or modules.
For information about Application Streams available in RHEL 9 and their application compatibility level,
see the Package manifest. Application compatibility levels are explained in the Red Hat Enterprise Linux
9: Application Compatibility Guide document.
3.4. PACKAGE MANAGEMENT WITH YUM/DNF
In Red Hat Enterprise Linux 9, software installation is ensured by DNF. Red Hat continues to support the
usage of the yum term for consistency with previous major versions of RHEL. If you type dnf instead of
yum, the command works as expected because both are aliases for compatibility.
Although RHEL 8 and RHEL 9 are based on DNF, they are compatible with YUM used in RHEL 7.
For more information, see Managing software with the DNF tool.
CHAPTER 3. DISTRIBUTION OF CONTENT IN RHEL 9
13
CHAPTER 4. NEW FEATURES
This part describes new features and major enhancements introduced in Red Hat Enterprise Linux 9.3.
4.1. INSTALLER AND IMAGE CREATION
Support to both legacy and UEFI boot for AWS EC2 images
Previously, RHEL image builder created EC2 AMD or Intel 64-bit architecture AMIs images with support
only for the legacy boot type. As a consequence, it was not possible to take advantage of certain AWS
features requiring UEFI boot, such as secure boot. This enhancement extends the AWS EC2 AMD or
Intel 64-bit architecture AMI image to support UEFI boot, in addition to the legacy BIOS boot. As a
result, it is now possible to take advantage of AWS features which require booting the image with UEFI.
Jira:RHELDOCS-16339
[1]
New boot option inst.wait_for_disks= to add wait time for loading a Kickstart file or the
kernel drivers
Sometimes, it may take a few seconds to load a Kickstart file or the kernel drivers from the device with
the OEMDRV label during the boot process. To adjust the wait time, you can now use the new boot
option, inst.wait_for_disks=. Using this option, you can specify how many seconds to wait before the
installation. The default time is set to 5 seconds, however, you can use 0 seconds to minimize the delay.
For more information about this option, see Storage boot options.
Bugzilla:2171811
Ability to select required kernel while installing RHEL on ARM using GUI and TUI
Previously, you could install RHEL on ARM with kernel-64k page size only by using the Kickstart method.
With this update, you can now install RHEL on ARM using the GUI or the TUI and selecting the required
kernel version. The option to select the required kernel is available on the Software Selection screen
under Kernel Options.
Bugzilla:2164819
[1]
Support for VMware VSphere (OVA)
This update adds support to build VMware VSphere OVA files by using RHEL image builder. The Open
Virtual Appliance (OVA) file is a virtual appliance used by the VMware VSphere virtualization application.
The OVA file contains files used to describe a virtual machine, such as an OVF descriptor file, one or
more virtual machine disk image files (VMDK), optional manifest (MF) and certificate files. By using the
VMware VSphere (.ova), you can more easily deploy the image to VMware vSphere by using the vSphere
GUI client. You can further customize the resulting VM before you boot the image.
Jira:RHELDOCS-16877
[1]
New network Kickstart options to control DNS handling
You can now control DNS handling using the network Kickstart command with the following new
options. Use these new options with the --device option.
The --ipv4-dns-search and --ipv6-dns-search options allow you to set DNS search domains
manually. These options mirror their NetworkManager properties, for example:
network --device ens3 --ipv4-dns-search domain1.example.com,domain2.example.com
Red Hat Enterprise Linux 9.3 9.3 Release Notes
14
The --ipv4-ignore-auto-dns and --ipv6-ignore-auto-dns options allow you to ignore DNS
settings from DHCP. They do not require any arguments.
Bugzilla:2065754
[1]
Minimal RHEL installation now installs only the s390utils-core package
In RHEL 8.4 and later, the s390utils-base package is split into an s390utils-core package and an
auxiliary s390utils-base package. As a result, setting the RHEL installation to minimal-environment
installs only the necessary s390utils-core package and not the auxiliary s390utils-base package. If you
want to use the s390utils-base package with a minimal RHEL installation, you must manually install the
package after completing the RHEL installation or explicitly install s390utils-base using a Kickstart file.
Bugzilla:1932480
[1]
4.2. SECURITY
Keylime rebased to version 7.3.0
The Keylime packages have been updated to upstream version 7.3.0. This version provides various
enhancements and bug fixes. Most notably, the allow and exclude lists are combined into the Keylime
runtime policy. You can combine the two lists by using the convert_runtime_policy.py script.
In addition, the update fixes two vulnerabilities with the moderate impact rating: CVE-2023-38200 and
CVE-2023-38201.
Jira:RHEL-476
[1]
Ports for Keylime have stricter rules in SELinux policy
Ports used by Keylime are now labeled as keylime_port_t in the Keylime SELinux policy. The policy now
allows TCP connections for ports with this label. This is because the previous Keylime SELinux policy
allowed connecting to all undefined ports and also most of the ports used by Keylime were in the
undefined group. As a result, this update increases the granularity of the Keylime SELinux policy, and
port security can be more strict and better targeted.
Jira:RHEL-595
[1]
Audit now supports FANOTIFY record fields
This update of the audit packages introduces support for FANOTIFY Audit record fields. The Audit
subsystem now logs additional information in the AUDIT_FANOTIFY record, notably:
fan_type to specify the type of a FANOTIFY event
fan_info to specify additional context information
sub_trust and obj_trust to indicate trust levels for a subject and an object involved in an event
As a result, you can better understand why the Audit system denied access in certain cases. This can
help you write policies for tools such as the fapolicyd framework.
Jira:RHELPLAN-161087
[1]
fapolicyd now provides rule numbers for troubleshooting
With this enhancement, new kernel and Audit components allow the fapolicyd service to send the
CHAPTER 4. NEW FEATURES
15
With this enhancement, new kernel and Audit components allow the fapolicyd service to send the
number of the rule that causes a denial to the fanotify API. As a result, you can troubleshoot problems
related to fapolicyd more precisely.
Jira:RHEL-624
crypto-policies now provides the NO-ENFORCE-EMS subpolicy for TLS 1.2 connections in
FIPS mode
The system-wide cryptographic policies now contain the NO-ENFORCE-EMS subpolicy. After applying
the new subpolicy, the system no longer requires the Extended Master Secret (EMS) extension (RFC
7627) for all TLS 1.2 connections negotiated in FIPS mode. This allows the system to connect to legacy
systems without support for EMS or TLS 1.3. Note that this violates the requirements of the FIPS-140-3
standard. You can apply the subpolicy by entering the update-crypto-policies --set FIPS:NO-
ENFORCE-EMS command.
Bugzilla:2216257
[1]
GnuTLS requires EMS with TLS 1.2 in FIPS mode
To comply with the FIPS-140-3 standard, GnuTLS servers and clients require the Extended Master
Secret (EMS) extension (RFC 7627) for all TLS 1.2 connections negotiated in FIPS mode. If your
scenario requires preserving compatibility with older servers and clients that do not support EMS and
you cannot use TLS 1.3, you can apply the NO-ENFORCE-EMS system-wide cryptographic subpolicy:
# update-crypto-policies --set FIPS:NO-ENFORCE-EMS
WARNING
If you allow TLS 1.2 connections without EMS, your system no longer meets the
FIPS-140-3 requirements.
Bugzilla:2157953
NSS now enforce EMS in FIPS mode
The Network Security Services (NSS) libraries now contain the TLS-REQUIRE-EMS policy to require
the Extended Master Secret (EMS) extension (RFC 7627) for all TLS 1.2 connections as mandated by
the FIPS 140-3 standard. NSS use the new policy when the system-wide cryptographic policies are set to
FIPS.
If your scenario requires interoperating with legacy systems without support for EMS or TLS 1.3, you can
apply the NO-ENFORCE-EMS system-wide cryptographic subpolicy. Such a change violates the FIPS-
140-3 requirements.
Bugzilla:2157950
OpenSSL now supports disabling EMS in FIPS mode
You can now configure the OpenSSL cryptographic libraries to allow for TLS 1.2 connections without the
Extended Master Secret (EMS) extension (RFC 7627) in FIPS mode by editing the
/etc/pki/tls/fips_local.cnf file. In a text editor of your choice, add the following section to the
Red Hat Enterprise Linux 9.3 9.3 Release Notes
16
configuration file:
[fips_sect]
tls1-prf-ems-check = 0
activate = 1
Then, locate the SSL configuration section in the /etc/pki/tls/openssl.cnf file. The default SSL
configuration section is crypto_policy. At the end of the SSL configuration section, add the following
line:
Options=RHNoEnforceEMSinFIPS
The previous configuration changes allow the system in FIPS mode to connect to legacy systems
without support for EMS or TLS 1.3.
WARNING
You can stop enforcing EMS for TLS 1.2 in FIPS mode by entering the update-
crypto-policies --set FIPS:NO-ENFORCE-EMS command. In both cases, such a
configuration change violates the requirements of the FIPS-140-3 standard.
Bugzilla:2216256
[1]
OpenSSH further enforces SHA-2
As part of the effort to migrate further from the less secure SHA-1 message digest for cryptographic
purposes, the following changes were made in OpenSSH:
Added a check on sshd startup whether using SHA-1 is configured on the system. If it is not
available, OpenSSH does not try to use SHA-1 for operations. This eliminates loading DSS keys
when they are present and also enforces advertising rsa-sha2 combinations when they are
available.
On SSH private key conversion, OpenSSH explicitly uses SHA-2 for testing RSA keys.
When SHA-1 signatures are unavailable on the server side, sshd uses SHA-2 to confirm host key
proof. This might be incompatible with clients on RHEL 8 and earlier versions.
When the SHA-1 algorithm is unavailable on the client side, OpenSSH uses SHA-2.
On the client side, OpenSSH permits SHA-2-based key proofs from the server when SHA-1 was
used in key proof request or when the hash algorithm is not specified (assuming default). This is
aligned with the already present exception for RSA certificates, and allows connecting by using
modern algorithms when supported.
Bugzilla:2070163
OpenSSL now contains protections against Bleichenbacher-like attacks
This release of the OpenSSL TLS toolkit introduces API-level protections against Bleichenbacher-like
attacks on the RSA PKCS #1 v1.5 decryption process. The RSA decryption now returns a randomly
CHAPTER 4. NEW FEATURES
17
generated deterministic message instead of an error if it detects an error when checking padding during
a PKCS #1 v1.5 decryption. The change provides general protection against vulnerabilities such as CVE-
2020-25659 and CVE-2020-25657.
You can disable this protection by calling the EVP_PKEY_CTX_ctrl_str(ctx,
"rsa_pkcs1_implicit_rejection". "0") function on the RSA decryption context, but this makes your
system more vulnerable.
Bugzilla:2153471
OpenSSL now supports Brainpool curves configurable through the Groups option
This update of the OpenSSL TLS toolkit introduces support for Brainpool curves in Elliptic Curve
Cryptography (ECC). Additionally, you can control the curves with the system-wide cryptographic
policies through the Groups configuration option.
The following Brainpool curves are enabled in OpenSSL ECC:
brainpoolP256r1
brainpoolP256t1
brainpoolP320r1
brainpoolP320t1
brainpoolP384r1
brainpoolP384t1
brainpoolP512r1
brainpoolP512t1
Bugzilla:2188180
crypto-policies now supports OpenSSL ECC Brainpool curves
With this update of the system-wide cryptographic policies, you can now control the following Brainpool
Elliptic Curve Cryptography (ECC) curves in OpenSSL by using the group option:
BRAINPOOL-P256R1
BRAINPOOL-P384R1
BRAINPOOL-P512R1.
For example, you can enable all supported Brainpool elliptic curves in OpenSSL by creating a subpolicy
that contains the following line:
group = BRAINPOOL-*+
Bugzilla:2193324
[1]
crypto-policies now use the same group order as OpenSSL by default
In this release, the system-wide cryptographic policies (crypto-policies) control the group order in the
OpenSSL Groups configuration option. To preserve the performance in OpenSSL, crypto-policies use
Red Hat Enterprise Linux 9.3 9.3 Release Notes
18
the default group order that matches the order of the OpenSSL built-in preferences. As a result, the
RHEL cryptographic back ends that support crypto-policies for controlling the group order, such as
GnuTLS, now use the same order as OpenSSL.
Jira:RHEL-591
[1]
crypto-policies permitted_enctypes no longer break replications in FIPS mode
Before this update, an IdM server running on RHEL 8 sent an AES-256-HMAC-SHA-1-encrypted service
ticket that an IdM replica running RHEL 9 in FIPS mode. Consequently, the default permitted_enctypes
krb5 configuration broke a replication between the RHEL 8 IdM server and the RHEL 9 IdM replica in
FIPS mode.
This update of the system-wide cryptographic policies reorders the permitted_enctypes krb5
configuration option values to allow prioritization of more interoperable encryption types by default. As a
result, the permitted_enctypes configuration no longer break replications between a RHEL 8 IdM
servers and a RHEL 9 IdM replica in FIPS mode.
NOTE
If you use Kerberos, verify the order of the values of permitted_enctypes in the
/etc/crypto-policies/back-ends/krb5.config file. If your scenario requires a different
order, apply a custom cryptographic subpolicy.
Bugzilla:2225222
pcsc-lite-ccid rebased to 1.5.2
The pcsc-lite-ccid package has been updated to version 1.5.2. This version provides various bug fixes
and enhancements, most notably:
Support for new readers
Fix for Alcor Micro AU9560
Bugzilla:2209457
opensc rebased to 0.23
The opensc packages have been updated to version 0.23. This version provides various bug fixes and
enhancements, most notably:
Added support for encryption and decryption using symmetric keys
Added support for signing data with a length of more than 512 bytes
Disabled old card driver support by default
Removed support for old drivers MioCOS and JCOP
Jira:RHEL-280
[1]
setools rebased to 4.4.3
The setools packages have been updated to version 4.4.3. This version provides various bug fixes and
enhancements, most notably:
CHAPTER 4. NEW FEATURES
19
Fixed compilation with Cython 3.0.0
Improved man pages
Removed unused options in sediff, sesearch, and apol
Added the -r option to seinfoflow command to get flows analysis into the source type
Rules with no permissions are automatically rejected as an invalid policy
Bugzilla:2231801, Bugzilla:2184140
Additional services confined in the SELinux policy
This update adds additional rules to the SELinux policy that confine the following systemd services:
qat
systemd-pstore
boothd
fdo-manufacturing-server
fdo-rendezvous-server
fdo-client-linuxapp
fdo-owner-onboarding-server
As a result, these services do not run with the unconfined_service_t SELinux label anymore, and run
successfully in SELinux enforcing mode.
Bugzilla:2080443
[1]
, Bugzilla:2026795, Bugzilla:2181565, Bugzilla:2128833
OpenSCAP rebased to 1.3.8
The OpenSCAP packages have been rebased to upstream version 1.3.8. This version provides various
bug fixes and enhancements, most notably:
Fixed systemd probes to not ignore some systemd units
Added offline capabilities to the shadow OVAL probe
Added offline capabilities to the sysctl OVAL probe
Added auristorfs to the list of network filesystems
Created a workaround for issues with tailoring files produced by the autotailor utility
Bugzilla:2217442
SCAP Security Guide rebased to version 0.1.69
The SCAP Security Guide (SSG) packages have been rebased to upstream version 0.1.69. This version
provides various enhancements and bug fixes. Most notably, it introduces three new SCAP profiles for
RHEL 9 aligned with the CCN-STIC-610A22 Guide issued by the National Cryptologic Center of Spain
in October 2022:
Red Hat Enterprise Linux 9.3 9.3 Release Notes
20
Profile name Profile ID Policy version
CCN Red Hat Enterprise Linux 9 -
Advanced
xccdf_org.ssgproject.conten
t_profile_ccn_advanced
2022-10
CCN Red Hat Enterprise Linux 9 -
Basic
xccdf_org.ssgproject.conten
t_profile_ccn_basic
2022-10
CCN Red Hat Enterprise Linux 9 -
Intermediate
xccdf_org.ssgproject.conten
t_profile_ccn_intermediate
2022-10
Bugzilla:2221697
ANSSI-BP-028 security profiles updated to version 2.0
The following French National Agency for the Security of Information Systems (ANSSI) BP-028 in the
SCAP Security Guide were updated to be aligned with version 2.0:
ANSSI-BP-028 Minimal Level
ANSSI-BP-028 Intermediary Level
ANSSI-BP-028 Enhanced Level
ANSSI-BP-028 High Level
Bugzilla:2155790
python3-greenlet-devel is now available in CRB
The python3-greenlet-devel package is now available in the CodeReady Linux Builder (CRB) repository,
which you must explicitly enable. See the How to enable and make use of content within CodeReady
Linux Builder Knowledgebase article for more information. Note that packages included in the CRB
repository are unsupported.
Bugzilla:2149497
SSG rule to check the group used by the pam_wheel.so module is simplified
The CIS Benchmark requires restricting the su command in favor of the sudo command. SCAP Security
Guide (SSG) fulfills this requirement with the pam_wheel.so module, which restricts the su command
to a specific group. This update improves the rule that checks whether this group exists and has no
members. As a result, the rule is more efficient and simplifies the interpretation of the assessment
report.
Jira:RHEL-1905
4.3. RHEL FOR EDGE
New FIDO Device Onboarding Servers container images are available
The following FIDO Device Onboarding Servers container images for onboarding IoT and edge
computing devices are now available in the Red Hat Container Catalog :
rhel9/fdo-manufacturing-server container image
CHAPTER 4. NEW FEATURES
21
rhel9/fdo-owner-onboarding-server container image
rhel9/fdo-rendezvous-server container image
rhel9/fdo-serviceinfo-api-server container image
Jira:RHELPLAN-163133
[1]
The minimal-raw image type now supports 64-bit ARM architectures
With this enhancement, you can create a minimal-raw image type with support for 64-bit ARM
architecture, and AMD and Intel 64-bit architectures. The minimal-raw image is pre-packaged,
bootable, minimal RPM image, compressed in the xz format. To boot the image, you must decompress
it and copy to any bootable device, such as an SD card. To decompress the image, run the following
command:
$ xz -d <_uuid-minimal-raw.img_.xz>
Jira:RHELPLAN-163665
[1]
The Commit ID is now supported as a value for the --parent argument of composer-cli CLI
You can now use the image Commit ID as a value for the --parent argument of the composer-cli
command line. To get the image Commit ID, download and extract the RHEL for Edge Commit image.
You can find the ref name and the commit ID in the extracted .tar file.
Jira:RHELDOCS-16386
[1]
Support to build RHEL for Edge .ami images
With this enhancement, you have support to build .ami images for RHEL for Edge by using on-premise
RHEL image builder. During the initial boot, you can customize the blueprint with Ignition to inject the
credentials into the image. You can upload the .ami image to AWS and boot an EC2 instance in AWS.
Jira:RHELDOCS-16708
[1]
Support to build .vmdk images for RHEL for Edge
With this enhancement, you have support to build a .vmdk image for RHEL for Edge by using on-
premise RHEL image builder. You can customize the blueprint with Ignition to inject the credentials into
the image during the initial boot. You can load the image on vSphere and boot the image in a VM
vSphere. The image is compatible with ESXi 7.0 U2, ESXi 8.0, and later. The VM is compatible with
versions 19 and 20.
Jira:RHELDOCS-16709
[1]
You can now log in to an Edge system as the initial user without setting a password
Previously, logging in as the initial user created during the FDO onboarding process did not work
because the system asked for a password that was not set with the useradd command. With this
enhancement, the password is now set to optional, and you can log in even if you did not previously set a
password by using the useradd command. Note that you can log in with an SSH key without entering a
password, and if it fails, you will be prompted to enter a password.
Jira:RHELDOCS-17101
[1]
Red Hat Enterprise Linux 9.3 9.3 Release Notes
22
4.4. SOFTWARE MANAGEMENT
New DNF Automatic reboot option for an automatic reboot after an upgrade
With this enhancement, you can use the DNF Automatic reboot option to set your system to
automatically reboot to apply the changes after an upgrade.
The reboot option supports the following settings:
never does not reboot the system. This is the current behavior.
when-changed triggers a reboot after any upgrade.
when-needed triggers a reboot only when rebooting is required to apply changes, for example,
when systemd or the kernel is upgraded.
You can use the reboot_command option to customize the command used to reboot. The default
reboot command is shutdown -r.
Bugzilla:2124793
The new --poweroff option allows you to shut down the system after installing updates
With this enhancement, the new --poweroff option has been added to the reboot command of the dnf
system-upgrade plugin. You can use this option to shut down the system after installing updates
instead of rebooting.
Bugzilla:2157844
New dnf leaves and show-leaves plug-ins are now available for the DNF API
With this enhancement, the following new DNF plug-ins are available that list packages installed on your
system that are not required as dependencies of other installed packages:
dnf leaves lists all packages.
show-leaves lists newly installed packages and packages that became unrequired as
dependencies of other installed packages after a transaction.
Bugzilla:2134638
4.5. SHELLS AND COMMAND-LINE TOOLS
The NetBackup services are now enabled for backup restoration
When using the NetBackup (NBU) backup method, ReaR now includes the unit files for the NetBackup
services version 10.1.1 in the rescue image and starts them when the rescue system boots. As a result, you
can restore the system backup by using the NBU backup method during the recovery process and
complete the restore successfully.
Bugzilla:2188593
opencryptoki rebased to 3.21.0
The opencryptoki package has been rebased to version 3.21.0, which provides many enhancements and
bug fixes. Most notably, opencryptoki now supports the following features:
Concurrent hardware security module (HSM) master key changes
CHAPTER 4. NEW FEATURES
23
The protected-key option to transform a chosen key into a protected key
Additional key types, such as DH, DSA, and generic secret key types
EP11 host library version 4
AES-XTS key type
IBM-specific Kyber key type and mechanism
Additional IBM-specific Dilithium key round 2 and 3 variants
Additionally, pkcsslotd slot manager no longer runs as root and opencryptoki offers further hardening.
With this update, you can also use the following set of new commands:
p11sak set-key-attr
To modify keys
p11sak copy-key
To copy keys
p11sak import-key
To import keys
p11sak export-key
To export keys
Bugzilla:2160061
[1]
Updated systemd-udevd assigns consistent network device names to InfiniBand interfaces
Introduced in RHEL 9, the new version of the systemd package contains the updated systemd-udevd
device manager. The device manager changes the default names of InfiniBand interfaces to consistent
names selected by systemd-udevd.
You can define custom naming rules for naming InfiniBand interfaces by following the Renaming IPoIB
devices using systemd link file procedure.
For more details of the naming scheme, see the systemd.net-naming-scheme(7) man page.
Bugzilla:2136937
4.6. INFRASTRUCTURE SERVICES
Postfix now supports SRV lookups
With this enhancement, you can now use the Postfix DNS service records resolution (SRV) to
automatically configure mail clients and balance load of servers. Additionally, you can prevent mail
delivery disruptions caused by temporary DNS issues or misconfigured SRV records by using the
following SRV-related options in your Postfix configuration:
use_srv_lookup
You can enable discovery for the specified service by using DNS SRV records.
allow_srv_lookup_fallback
You can use a cascading approach to locating a service.
ignore_srv_lookup_error
Red Hat Enterprise Linux 9.3 9.3 Release Notes
24
You can ensure that the service discovery remains functional even if SRV records are not available or
encounter errors.
Bugzilla:2134789
Generic LF-to-CRLF driver is available in cups-filters
With this enhancement, you can now use the Generic LF-to-CRLF driver, which converts LF characters
to CR+LF characters for printers accepting files with CR+LF characters. The carriage return (CR) and
line feed (LF) are control characters that mark the end of lines. As a result, by using this driver, you can
send an LF character terminated file from your application to a printer accepting only CR+LF characters.
The Generic LF-to-CRLF driver is a renamed version of the text-only driver from RHEL 7. The new
name reflects its actual functionality.
Bugzilla:2229784
4.7. NETWORKING
RHEL on ARM now fully supports wifi adapters in RHEL 9.3
With this enhancement, you can now enable access to wifi adapters for several cards for the arm64
platforms.
For details on configuring wifi connections, see Managing wifi connections.
Bugzilla:2208365
[1]
NetworkManager now supports the no-aaaa option in resolv.conf
NetworkManager now supports adding the no-aaaa DNS option in the resolv.conf file. By using the no-
aaaa value in the DNS option setting, you can disable IPv6 DNS resolution.
Bugzilla:2176137
nmstate now supports mixing static DNS search along with dynamic DNS name servers
The nmstate framework now supports both static Domain Name System (DNS) search domains and
dynamic DNS name servers, which nmstate obtained from Dynamic Host Configuration Protocol
(DHCP) or the autoconf mechanism. Previously, static DNS search domains could not co-exist with
dynamic DNS name servers because the dynamic configurations were discarded by nmstate. This often
led to unnecessary complexity and limitations in network setup and management. This enhancement
aims to bring more flexibility in managing DNS configurations. As a result, nmstate attempts to find a
network interface to store the DNS configuration in the following order:
1. The preferred interface, which currently holds the DNS configuration and is still valid for DNS
2. An automatic interface
3. An IP enabled interface
Note that this enhancement does not remove the DNS name servers learned from DHCP.
The following is an example YAML file to apply this feature:
---
dns-resolver:
config:
CHAPTER 4. NEW FEATURES
25
search:
- example.com
- example.org
interfaces:
- name: eth1
type: ethernet
state: up
ipv4:
enabled: true
dhcp: true
ipv6:
enabled: true
dhcp: true
autoconf: true
Bugzilla:2179916
nmstate now supports the bridge.vlan-default-pvid NetworkManager configuration option
With this update, you can use the nmstate framework to configure the bridge.vlan-default-pvid
NetworkManager configuration option. By using this option, you can set the default port VLAN identifier
(PVID) for untagged traffic on a bridge interface that supports VLANs, when you use Linux bridge VLAN
filtering. To achieve this result, use the following YAML configuration:
interfaces:
- name: linux-br0
type: linux-bridge
state: up
bridge:
options:
vlan-default-pvid: 5
port:
- name: eth1
stp-hairpin-mode: false
stp-path-cost: 100
stp-priority: 32
vlan:
mode: access
tag: 100
Note that the default value of bridge.vlan-default-pvid is 1. When set to 0 with VLAN filtering enabled,
the untagged traffic is dropped.
Bugzilla:2180795
The NetworkManager service restarts immediately after the dbus service is restarted
Previously, after restarting dbus for some reason, NetworkManager stopped. This behavior was not
optimal and caused a loss of connectivity. Therefore, this enhancement updates NetworkManager to
become more robust and to make it restart automatically upon a dbus restart.
Bugzilla:2161915
The nm-cloud-setup utility now supports IMDSv2 configuration
Users can configure an AWS Red Hat Enterprise Linux EC2 instance with Instance Metadata Service
Version 2 (IMDSv2) with the nm-cloud-setup utility. To comply with improved security that restricts
Red Hat Enterprise Linux 9.3 9.3 Release Notes
26
unauthorized access to EC2 metadata and new features, integration between AWS and Red Hat services
is necessary to provide advanced features. This enhancement enables the nm-cloud-setup utility to
fetch and save the IMDSv2 tokens, verify an EC2 environment, and retrieve information about available
interfaces and IP configuration by using the secured IMDSv2 tokens.
Bugzilla:2151986
NetworkManager notifies when using the deprecated ifcfg format
Connection profiles in ifcfg format are deprecated in RHEL 9 (see NetworkManager connection profiles
in ifcfg format are deprecated ). With this update, NetworkManager notifies users about the deprecation
of this format:
NetworkManager logs the following warning to the systemd journal if it processes a connection
profile in ifcfg format in the /etc/sysconfig/network-scripts/ directory:
Warning: the ifcfg-rh plugin is deprecated, please migrate connections to the keyfile format
using "nmcli connection migrate"
The nmcli utility reports the following error if you try to modify a property that is not supported
in ifcfg format:
Error: Failed to modify connection '<name>': failed to update connection: The ifcfg-rh plugin
doesn't support setting '<property>'. If you are modifying an existing connection profile saved
in ifcfg-rh format, please migrate the connection to keyfile using 'nmcli connection migrate
<connection_uuid>' or via the Update2() D-Bus API and try again.
As a result of these enhancements, NetworkManager now notifies users if they still use or modify
connection profiles in the deprecated ifcfg format.
For further details about migrating profiles from ifcfg to keyfile format, see Migrating NetworkManager
profiles from ifcfg to keyfile format.
Bugzilla:2190375
NetworkManager now supports the lacp_active option in the bonding configuration
By using NetworkManager, the lacp_active option in bonding configuration provides fine-grained
control over Link Aggregation Control Protocol Data Units (LACPDU) frames. The lacp_active option
also adjusts the behavior of LACPDU frames and controls periodic transmission of these frames in the
bonding setup. To customize network configurations, you can enable or disable periodic transmission of
LACPDU frames by setting lacp_active to ON or OFF.
Bugzilla:2069001
NetworkManager now supports configuration of the ns_ip6_target option for bond interfaces
This enhancement allows setting the arp_interval option by specifying a maximum of 16 IPv6 addresses
as monitoring peers in NetworkManager for configuration of the ns_i6_target option for bond
interfaces. Previously, it was not possible to specify IPv6 monitoring peers in NetworkManager. With
this update, you can configure the ns_ip6_target option in the bond.options parameter by using the
nmcli utility. NetworkManager applies this setting to the bond interface by enabling the specification of
a maximum of 16 IPv6 addresses. This enhancement equally applies to IPv4 and IPv6 settings.
Bugzilla:2069004
NetworkManager now supports both static and DHCP IP configuration on the same network
CHAPTER 4. NEW FEATURES
27
NetworkManager now supports both static and DHCP IP configuration on the same network
interface
By using the nmstate utility, you can now assign a static IP address with dhcp: true or autoconf: true
value on the DHCP or Ad-Hoc Network Autoconfiguration (autoconf) enabled interface.
With this enhancement, nmstate supports two properties of IP addresses:
valid_lft means valid lifetime in seconds
preferred_lft means preferred lifetime in seconds
Default value of both parameters is forever which means static.
With above properties, nmstate can ignore DHCP/autoconf based IP addresses to avoid converting
dynamic IP addresses to static IP after applying the queried state back. If your scenario requires having
disabled DHCP/autoconf settings with dynamic IP addresses, nmstate converts those dynamic IP to
static IP addresses.
Bugzilla:2177733
nmstate supports MAC address identifiable network interface
The nmstate utility supports network configuration directly to a network interface with a MAC address
instead of an interface name.
This enhancement introduces two properties to the base interface:
identifier : identifies name or mac-address on a network. The default value is name.
profile-name : string
When the identifier variable is set to the mac-address value, nmstate uses the interface.mac-address
over interface.name to choose a network interface for a specific network state. When storing the
network configuration, if the interface.profile-name variable is not assigned, nmstate prefers
interface.profile-name over interface.name. If you check the current network state, the
interface.profile-name remains hidden if it is equal to interface.name.
Bugzilla:2183214
NetworkManager supports defining after how many failed ARP checks the bonding driver
marks a port as down
This enhancement adds the arp_missed_max option to bond connection profiles in NetworkManager. If
you use the Address Resolution Protocol (ARP) monitor to check if ports of a bond are up, you can now
set arp_missed_max to define after how many failed checks the bonding driver marks the port as
down.
Bugzilla:2148684
NetworkManager supports specifying link-related properties
This enhancement adds the following network link properties to NetworkManager connection profiles:
link.tx-queue-length - The size of the transmit (TX) queue length in number of packets.
link.gro-max-size - The maximum size in bytes of a Generic Receive Offload (GRO) packet the
device accepts.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
28
link.gso-max-segments - The maximum number of segments of a Generic Segmentation
Offload (GSO) packet the device accepts.
link.gso-max-size - The maximum size in bytes of a GSO packet.
Previously, you could configure these kernel settings only by using ip commands or by using such
commands in NetworkManager dispatcher scripts. With this enhancement, you can now configure these
settings directly in connection profiles.
Note that NetworkManager supports these properties only in connection profiles in keyfile format and
not in the deprecated ifcfg format.
Bugzilla:2158328
The nmstate API support available for dhcp-send-hostname and dhcp-custom-hostname
DHCP options
With this enhancement, the nmstate utility supports configuration of the following two DHCP options in
the connection file:
dhcp-send-hostname: true or false value. If a DHCP request needs the hostname or fully
qualified domain name (FQDN) option, the hostname from that option is set. The default is
true.
dhcp-custom-hostname: <string>. Use this option to configure the hostname or FQDN option
in a DHCP request, value type is string.
For DHCPv4 network protocols
If the hostname is FQDN, see the Fully Qualified Domain Name (FQDN), option (81) in RFC
4702.
If the hostname is not FQDN, see the Host Name, option (12) in RFC 2132.
For DHCPv6 network protocols
Supports custom string, empty domain name, overrides the hostname for a DHCP request. See
the Fully Qualified Domain Name (FQDN), option (29) in RFC 4704.
Bugzilla:2187622
NetworkManager rebased to version 1.44.0
The NetworkManager packages have been upgraded to upstream version 1.44.0, which provides several
enhancements and bug fixes over the previous version:
Link-related properties have been added to NetworkManager .
The arp_missed_max, lacp_active, and ns_ip6_target properties have been added to bond
connection profiles.
You can now set a DHCPv6 prefix delegation hint in the ipv6.dhcp-pd-hint connection
property.
Enabling the new rename parameter in the [keyfile] section of the
/etc/NetworkManager/NetworkManager.conf file causes NetworkManager to rename a
connection profile in /etc/NetworkManager/system-connections/ if you change a profile name
CHAPTER 4. NEW FEATURES
29
(connection.id). If external applications or scripts rely on the file names, do not enable this
parameter.
When you set a hostname that contains a non-public top-level domain (TLD), NetworkManager
now uses this TLD as DNS search domain instead of the full hostname.
NetworkManager now applies DNS options from the [global-dns] section in the
/etc/NetworkManager/NetworkManager.conf file.
To avoid race conditions with other depending services, NetworkManager now acquires the D-
Bus name only after populating the D-Bus tree. Note that this can add a delay when
NetworkManager starts.
NetworkManager now adds a version-id argument to Update2() D-Bus calls to prevent
concurrent profile modifications.F
NetworkManager no longer uses tentative IPv6 addresses to resolve the system hostname from
DNS.
To prevent unexpected behaviors in case of multi-connect profiles, NetworkManager now
tracks the number of auto-connect retries left for each device and connection instead of only
per connection.
NetworkManager sets VLAN filtering options by using the kernel’s netlink interface instead of
the sysfs file system.
The nm-cloud-setup utility now supports Instance Metadata Service Version 2 (IDMSv2) on
Amazon EC2.
Users can now enable and disable wifi and Wireless Wide Area Networks (WWANs) in the nmtui
application.
Bond, bridge, and team connections now use the ignore-carrier=no setting in the [main]
section of the /etc/NetworkManager/NetworkManager.conf file.
Bugzilla:2180966
SCTP rebased to the latest version of the kernel networking tree for RHEL 9
Notable changes in the Stream Control Transmission Protocol (SCTP) networking subsystem include:
Virtual routing and forwarding (VRF) support to segment and isolate SCTP traffic within
complex network environments.
New stream schedulers (fair capacity, and weighted fair queueing) to ensure efficient and
equal resource allocation in the network.
Bugzilla:2189292
MPTCP rebased to the latest version of the kernel networking tree for RHEL 9
Notable changes in the Multipath TCP (MPTCP) protocol extension include:
Support for TCP fastopen (TFO) extension, including the client-side support. This feature
offers latency, efficiency, and performance improvements for your network.
Support multiple mixed IPv4/IPv6 subflows to allow for greater flexibility and adaptability in
networks where both IP versions are used.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
30
Bugzilla:2193330
[1]
The xdp-tools package rebased to version 1.4.0
The xdp-tools package has been upgraded to version 1.4.0, which provides multiple bug fixes and
enhancements. Notable changes include:
The xdp-bench utility gained support for multi-buffer eXpress Data Path (XDP) and for
benchmarking the xdp_load_bytes() helper in the kernel. This feature enables conducting
network benchmarking tests with large maximum transmission units (MTUs).
The locking of the command line utilities of xdp-tools was improved to prevent stale locks if the
utility did not exit cleanly.
The libxdp library contains a new xsk_umem__create_with_fd() API that accepts an extra file
descriptor of an already open AF_XDP socket. You can use this function as a substitute for the
regular xsk_umem__create() function when a process does not have CAP_NET_RAW
privileges.
Bugzilla:2218500
iproute rebased to version 6.2.0
The iproute packages have been upgraded to upstream version 6.2.0, which provides several
enhancements and bug fixes over the previous version. The most notable changes are:
The new ip stats command manages and shows interface statistics. By default, the ip stats
show command displays statistics for all network devices, including bridges and bonds. You can
filter the output by using the dev and group options. For further details, see the ip-stats(8)
man page.
The ss utility now provides the -T (--threads) option to display thread information, which
extends the -p (--processes) option. For further details, see the ss(8) man page.
You can use the new bridge fdb flush command to remove specific forwarding database (fdb)
entries which match a supplied option. For further details, see the bridge(8) man page.
Jira:RHEL-428
[1]
The kernel supports activating bond ports in a specific order
With this enhancement, the kernel’s netlink interface supports setting a priority on each port if you
configure a bond in active-backup, balance-tlb or balance-alb mode. The priority value uses a 32-bit
Integer, and a higher value means a higher priority. As a result, you can now activate the bond ports in a
specific order.
To use this feature, you can configure the priority by setting the bond-port.prio property when you
create or modify a NetworkManager port connection profile.
Bugzilla:2092194
[1]
firewalld now avoids unnecessary firewall rule flushes
With the release of the RHBA-2023:7748, advisory the firewalld service was upgraded in a sense that it
will not remove all the existing rules from the iptables configuration if both following conditions are met:
firewalld is using the nftables backend.
CHAPTER 4. NEW FEATURES
31
There are no firewall rules created with the --direct option.
This change aims at reducing unnecessary operations (firewall rules flushes) and improves integration
with other software.
Jira:RHEL-14694
[1]
Introduction of new nmstate attributes for the VLAN interface
With this update of the nmstate framework, the following VLAN attributes were introduced:
registration-protocol: VLAN Registration Protocol. The valid values are gvrp (GARP VLAN
Registration Protocol), mvrp (Multiple VLAN Registration Protocol), and none.
reorder-headers: reordering of output packet headers. The valid values are true and false.
loose-binding: loose binding of the interface to the operating state of its primary device. The
valid values are true and false.
Your YAML configuration file can look similar to the following example:
---
interfaces:
- name: eth1.101
type: vlan
state: up
vlan:
base-iface: eth1
id: 101
registration-protocol: mvrp
loose-binding: true
reorder-headers: true
Jira:RHEL-19142
[1]
4.8. KERNEL
Kernel version in RHEL 9.3
Red Hat Enterprise Linux 9.3 is distributed with the kernel version 5.14.0-362.8.1.
Bugzilla:2232554
Support added for NVIDIA Grace CPUs
Red Hat Enterprise Linux 9.3 adds support for the NVIDIA Grace ARM 64-bit CPU.
Jira:RHELDOCS-17055
[1]
The RHEL kernel now supports AutoIBRS
Automatic Indirect Branch Restricted Speculation (AutoIBRS) is a feature provided by the AMD EPYC
9004 Genoa family of processors and later CPU versions. AutoIBRS is the default mitigation for the
Spectre v2 CPU vulnerability, which boosts performance and improves scalability.
Bugzilla:1898184
[1]
Red Hat Enterprise Linux 9.3 9.3 Release Notes
32
perf rebased to version 6.2
The perf performance analysis tool has been rebased to version 6.2. Apart from numerous minor bug
fixes and updates, the perf list command now displays Performance Monitor Unit (PMU) events that
contain human-friendly names and descriptions. In addition, this update adds support for the following
processors:
Intel 13th generation of Core processors (Intel Raptor Lake-S)
Intel 14th generation of processors (Intel Meteor Lake)
Intel 5th generation Xeon server processors (Intel Emerald Rapids)
Bugzilla:2177180
[1]
The Intel® QAT kernel driver rebased to upstream version 6.2
The Intel® Quick Assist Technology (QAT) has been rebased to upstream version 6.2. The Intel® QAT
includes accelerators optimized for symmetric and asymmetric cryptography, compression
performance, and other CPU intensive tasks.
The rebase includes many bug fixes and enhancements. The most notable enhancement is the support
available for following hardware accelerator devices for QAT GEN4:
Intel Quick Assist Technology 401xx devices
Intel Quick Assist Technology 402xx devices
Bugzilla:2144528
[1]
vTPM functionality is available for Linux containers
This enhancement introduces virtual Trusted Platform Module (vTPM) for Linux containers and other
virtual environments. vTPM is a virtualized version of TPM that provides a dedicated TPM instance to
use for a secure running environment. With vTPM proxy drivers, programs interact with an emulated
TPM the same way as they interact with physical TPMs.
As a result, each virtual machine can now have a dedicated vTPM instance that is isolated and
encrypted.
Bugzilla:2210263
[1]
crash rebased to version 8.0.3
crash is an interactive utility to analyze a running system and a core dump file created by kdump in case
of a kernel crash. The crash utility has been rebased to version 8.0.3 that includes many bug fixes and
enhancements. The most notable enhancement is the added IPv6 support.
For network interfaces that support IPv6, crash prints IPv6 addresses with the net or net -s command.
The net command displays the list of network devices, names, and the IP address.
The net -s command displays the following information:
The open network socket and sock addresses
The family and the type of sockets and sock addresses
CHAPTER 4. NEW FEATURES
33
The source and destination address and ports for INET and INET6 families
Bugzilla:2170283
LVM thin-provisioned storage volumes supported as the vmcore dump target
The kdump mechanism now supports thin-provisioned logical volumes as the vmcore target. To
configure LVM thin provisioning, complete the following steps:
1. Create an LVM volume group.
vgcreate vg00 /dev/sdb
2. Create an LVM thin pool of 10 MB available space.
lvcreate -L 10M -T vg00/thinpool
3. Create an LVM thin volume with 300 MB of the file system space.
lvcreate -V 300M -T vg00/thinpool -n thinvol
mkfs.ext4 /dev/vg00/thinvol
4. Configure the LVM thin pool threshold to automatically extend the space.
cat /etc/lvm/lvm.conf
activation {
thin_pool_autoextend_threshold = 70
thin_pool_autoextend_percent = 20
monitoring = 1
}
5. Enable the LVM thin pool monitoring service for the first kernel.
systemctl enable lvm2-monitor.service
systemctl start lvm2-monitor.service
6. Append the following lines to the kdump.conf file to set the LVM thin volume as the kdump
target.
ext4 /dev/vg00/thinvol
path /
7. Start the kdump service.
kdumpctl restart
8. Verify the configuration by triggering a kernel panic and check if the vmcore is saved to
/dev/vg00/thinvol.
As a result, with this enhancement, the kdump mechanism now extends capability to save the vmcore
dump files on thin-provisioned storage volumes.
Bugzilla:2083475
Red Hat Enterprise Linux 9.3 9.3 Release Notes
34
makedumpfile rebased to upstream version 1.7.3
The makedumpfile tool, which makes the crash dump file small by compressing pages or excluding
memory pages that are not required, has been rebased to upstream version 1.7.3. The rebase includes
many bug fixes and enhancements.
The most notable change is the added 5-level paging mode for standalone dump (sadump) mechanism
on AMD and Intel 64-bit architecture. The 5-level paging mode extends the processor’s linear address
width to allow applications access larger amounts of memory. 5-level paging extends the size of virtual
addresses from 48 to 57 bits and the physical addresses from 46 to 52 bits.
Bugzilla:2173815
Red Hat Enterprise Linux supports ARM’s SystemReady ES and IR tier
Red Hat Enterprise Linux now supports ARM’s SystemReady ES and IR, while previously only the SR tier
was supported. In RHEL 9.3, the NVIDIA Orin, NXP i.MX 8M, and NXP i.MX 8M Mini modules have been
enabled and are candidates for the RHEL hardware certification. Hardware partners are able to submit
certifications by enrolling in the Red Hat hardware certification journey. Customers can use the
supported hardware listed in the catalog for an improved experience in production.
Bugzilla:2195986
[1]
RHEL on ARM now supports Bluetooth
With this enhancement, you can configure a bluetooth device by using the bluetoothctl tool on the
command-line interface.
Bugzilla:2187856
[1]
RHEL on ARM now fully supports USB-attached cameras in RHEL 9.3
This enhancement enables the CONFIG_MEDIA_SUPPORT kernel configuration for RHEL on AMD and
Intel 64-bit architectures platforms. With that, you can now use USB cameras on AMD and Intel 64-bit
architectures systems.
Bugzilla:2192722
[1]
bpf rebased to version 6.3
The Berkeley Packet Filter (BPF) facility has been rebased to Linux kernel version 6.3. Notable changes
and enhancements include:
BPF trampoline is now available on the 64-bit IBM Z architecture.
A new map type - BPF_MAP_TYPE_USER_RINGBUF - and related helpers have been defined
for the communication between the user space and kernel over a BPF-specific ring buffer.
BPF now provides new complex data structures: linked list and rbtree.
BPF trampoline that traces programs now supports struct arguments.
BPF now provides a way to export XDP features supported by a NIC.
Hardware metadata are now exposed to XDP programs by using the BPF kernel functions
(kfuncs) with initial support for RX hash and timestamp metadata.
BPF now provides a helper that sets source and destination NAT addresses and ports in new
CHAPTER 4. NEW FEATURES
35
BPF now provides a helper that sets source and destination NAT addresses and ports in new
conntrack module entries in BPF programs.
BPF can now write directly to the nf_conn:mark connection mark of the netfilter packet
filtering framework.
Bugzilla:2178930
[1]
4.9. BOOT LOADER
New default behavior of grub2-mkconfig with BLS
In the Boot Loader Specification (BLS) framework, GRUB generates the boot menu dynamically from
BLS snippets at boot, and it is not predefined in the grub.cfg file.
Previously, the grub2-mkconfig command generated a new grub.cfg file and always overwrote the
command-line arguments in all BLS snippets with the value of the GRUB_CMDLINE_LINUX variable
found in the /etc/default/grub file.
With this release, the grub2-mkconfig command no longer overwrites the kernel command line in BLS
snippets with GRUB_CMDLINE_LINUX by default. Each kernel in the boot loader menu takes its kernel
command line from its BLS snippet. This new default behavior is caused by the
GRUB_ENABLE_BLSCFG=true option.
To regenerate grub.cfg so that kernels ignore BLS snippets and take their command line from
GRUB_CMDLINE_LINUX instead, set the GRUB_ENABLE_BLSCFG=false option.
To update the kernel command line in BLS snippets according to GRUB_CMDLINE_LINUX, add the --
update-bls-cmdline option:
# grub2-mkconfig -o /path/to/grub.cfg --update-bls-cmdline
Also note that you can make changes to BLS snippets for individual kernels using grubby:
# grubby --update-kernel /path/to/kernel --args "new args"
Jira:RHELDOCS-16752
[1]
4.10. FILE SYSTEMS AND STORAGE
NFS server now implements courteous server code for nfsd
This update introduces the implementation of courteous server code for nfsd in the RHEL kernel NFS
server. With this new feature, the NFS server avoids revoking leases for clients that have lost contact
with the server for an extended period, provided that there is no conflicting access while the client is out
of contact.
Bugzilla:2180124
DAX mount option and reflink are now compatible
With this update, reflinked files are now generally compatible with DAX mode. The file system DAX
mount option -o dax=always is compatible with reflink-enabled file systems. Files that were reflinked
can be set to DAX mode using inode flags. For more information see the xfs(5) man page.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
36
Bugzilla:2192730
[1]
New encryption types for the RPCSEC GSS Kerberos V5
The RPCSEC GSS Kerberos V5 mechanism now supports encryption types defined in RFC 6803
(Camellia Encryption for Kerberos 5) and RFC 8009 (AES Encryption with HMAC-SHA2 for Kerberos
5).
The following encryption types have been added:
camellia128-cts-cmac
camellia256-cts-cmac
aes128-cts-hmac-sha256-128
aes256-cts-hmac-sha384-192
This allows NFS clients and NFS servers to use stronger encryption types when negotiating GSS
contexts.
Bugzilla:2178741
fuse3 now allows invalidating a directory entry without triggering umount
With this update, a new mechanism has been added to fuse3 package, that allows invalidating a
directory entry without automatically triggering the umount of any mounts that exists on the entry.
Bugzilla:2188182
Stratis storage manager is now available
Stratis is a local storage manager. It provides managed file systems on top of pools of storage with
additional features to the user:
Manage snapshots and thin provisioning
Automatically grow file system sizes as needed
Maintain file systems
Pool Level Encryption
TMP2 and NBDE Support
To administer Stratis storage, use the stratis utility, which communicates with the stratisd background
service.
For more information, see the Stratis documentation: Setting up Stratis file systems.
Bugzilla:2041558
Improvements to GFS2 file system configuration and operation
The following updates have been implemented for GFS2 file systems:
The mkfs.gfs2 command now supports the new -U option, which makes it possible to specify
the file system UUID for the file system you create. If you omit this option, the file system’s
UUID is generated randomly.
CHAPTER 4. NEW FEATURES
37
The gfs2_jadd command creates journals at a much faster speed than in previous releases.
The GFS2 man pages have been improved.
Bugzilla:2170017
dmpd rebased to version 1.0.2
The dmpd package has been upgraded to version 1.0.2. Notable changes include:
Rewriting the tools in the Rust language for memory safety and for using multiple threads to
boost performance.
Improving the thin_check and cache_check tools to save the time of LVM pool activation
along with the system startup. The required execution time for these tools is now improved by
more than ten times as compared to the previous version.
Updating thin_dump and thin_restore tools to avoid losing sharing of the metadata btrees for
snapshots. Now the restored metadata does not require more space.
Adding new thin_metadata_pack and thin_metadata_unpack tools to compress thin
metadata, typically to a tenth of the size. This is better than the generic compressors. With this
tool, it is easier to pass damaged metadata around for inspection.
Bugzilla:2175198
New per-device counter is added for SCSI devices
A new per-device counter, iotmo_cnt, is now added for the I/O timeouts in the SCSI updates. In
addition to the iorequest_cnt count of I/O requests, the iodone_cnt I/O completions, and the
ioerr_cnt I/O errors, the number of request timeouts can be seen. For example:
/sys/devices/pci0000:16/0000:16:02.0/0000:17:00.0/host2/target2:2:0/2:2:0:0/iorequest_cnt
/sys/devices/pci0000:16/0000:16:02.0/0000:17:00.0/host2/target2:2:0/2:2:0:0/iodone_cnt
/sys/devices/pci0000:16/0000:16:02.0/0000:17:00.0/host2/target2:2:0/2:2:0:0/iotmo_cnt
/sys/devices/pci0000:16/0000:16:02.0/0000:17:00.0/host2/target2:2:0/2:2:0:0/ioerr_cnt
Bugzilla:2171093
[1]
mpathcleanup flushes the multipath devices in device-mapper-multipath
The mpathcleanup tool works on SCSI-based multipath devices and removes the multipath device
along with the SCSI path devices. Some users need to remove multipath devices and their path devices
regularly. Previously, there was no tool available to remove multipath devices and a user-defined script
was required for this operation.
With this new tool, users can now easily remove multipath devices and their underlying storage, and
there is no need to create any script for this operation.
Jira:RHEL-782
[1]
nvme-cli rebased to version 2.4
The nvme-cli package has been upgraded to version 2.4, which provides multiple bug fixes and
enhancements. Notable changes include:
Supports TLS over TCP.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
38
Fixes incorrect ordering of the systemd auto-connect services to mount file systems using the
/etc/fstab file.
Fixes printing of the u32 values.
Validates storage tag size correctly.
Supports the nvme effects-log command for fabrics controllers.
Bugzilla:2159929
[1]
4.11. HIGH AVAILABILITY AND CLUSTERS
Support for failover of LVM volume groups with missing physical volumes
The LVM-activate resource agent now supports two new options that allow volume group failover if the
volume group is missing physical volumes:
The majoritypvs option allows the system ID to be changed on a volume group when a volume
group is missing physical volumes, provided that a majority of physical volumes are present.
The degraded_activation option allows RAID logical volumes in a volume group to be activated
when legs are missing, provided that sufficient devices are available for RAID to provide all the
data in the logical volume.
Bugzilla:2174911
[1]
IPaddr2 and IPsrcaddr cluster resource agents now support policy-based routing
The IPaddr2 and IPsrcaddr cluster resource agents now support policy-based routing,which enables
you to configure complex routing scenarios. Policy-based routing requires that you configure the
resource agent’s table parameter.
Bugzilla:2142518
The Filesystem resource agent now supports the EFS file system type
The ocf:heartbeat:Filesystem cluster resource agent now supports the Amazon Elastic File System
(EFS). You can now specify fstype=efs when configuring a Filesystem resource.
Bugzilla:2142002
New pcs parsing requires meta keyword when specifying clone meta attributes
To ensure consistency in the pcs command format, configuring clone meta attributes with the pcs
resource clone, pcs resource promotable, and pcs resource create commands without specifying
the meta keyword is now deprecated.
Previously, the meta keyword was ignored in the pcs resource clone and pcs resource promotable
commands. In the pcs resource create command, however, the meta attributes specified after the
meta keyword when it followed the clone keyword were assigned to the resource rather than to the
clone. With this updated parsing algorithm, meta attributes specified after the meta keyword when it
follows the clone keyword are assigned to the clone. To maintain compatibility with existing scripts
which rely on the older format, you must specify the --future command option to enable this new
argument processing when creating a cloned resource with the pcs resource create command.
The following command now creates a resource with the meta attribute mv=v1 and a clone with the
CHAPTER 4. NEW FEATURES
39
The following command now creates a resource with the meta attribute mv=v1 and a clone with the
meta attribute mv=v2:
pcs resource create dummy1 ocf:pacemaker:Dummy meta m1=v1 clone meta m2=v2 --future
Bugzilla:2168155
Displaying the pcs commands for re-creating configured resource constraints
You can now display the pcs constraint commands that can be used to re-create configured resource
constraints on a different system by using the pcs constraint command with the new --output-
format=cmd option. The default output format is plain text, as in previous releases, which you can
specify with the --output-format=text option. The plain text format has been changed slightly to make it
consistent with the output format of other pcs commands.
Bugzilla:2163953
Rebase Pacemaker packages to version: 2.1.6
The Pacemaker packages have been upgraded to upstream version 2.1.6, which provides several
enhancements and bug fixes over the previous version.
The following features have been added:
Previously, when a Pacemaker Remote connection was lost, Pacemaker would always purge its
transient node attributes. This was unnecessary if the connection was quickly recoverable and
the remote daemon had not restarted in the meantime. Pacemaker Remote nodes now
preserve transient node attributes after a brief, recoverable connection outage.
The alert_snmp.sh.sample alert agent, which is the sample alert agent provided with
Pacemaker, now supports the SNMPv3 protocol and SNMPv2. With this update, you can copy
the alert_snmp.sh.sample agent without modification to use SNMPv3 with Pacemaker alerts.
Pacemaker alerts and alert recipients now support an enabled meta option. Setting this option
to false for an alert disables the alert. Setting this option to true for an alert and false for a
particular recipient disables the alert for that recipient. The default value for this option is true.
You can use this option to temporarily disable an alert for any reason, such as planned
maintenance.
The following bugs have been fixed:
Pacemaker Designated Controller elections no longer finalized until all pending actions are
complete and no action results are lost.
The fence_scsi agent is now able to auto-detect shared lvmlockd devices when the devices
attribute is not set.
Resource stickiness now properly compares against colocation scores.
The crm_resource command now allows banning or moving a bundle with only a single active
replica.
Previously, promotable clone instances were assigned in numerical order, with promoted
instances first. As a result, if a promoted clone instance needed to start, an unpromoted
instance in some cases restarted unexpectedly, because the instance numbers changed. With
this fix, roles are considered when assigning instance numbers to nodes and as a result no
unnecessary restarts occur.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
40
Bugzilla:2189301
Enhancements to the pcs property command
The pcs property command now supports the following enhancements:
The pcs property config --output-format= option
Specify --output-format=cmd to display the pcs property set command created from the
current cluster properties configuration. You can use this command to re-create configured
cluster properties on a different system.
Specify --output-format=json to display the configured cluster properties in JSON format.
Specify output-format=text to display the configured cluster properties in plain text format,
which is the default value for this option.
The pcs property defaults command, which replaces the deprecated pcs property --defaults
option
The pcs property describe command, which describes the meaning of cluster properties
Bugzilla:2163914
4.12. DYNAMIC PROGRAMMING LANGUAGES, WEB AND DATABASE
SERVERS
A new environment variable in Python to control parsing of email addresses
To mitigate CVE-2023-27043, a backward incompatible change to ensure stricter parsing of email
addresses was introduced in Python 3.
The update in RHSA-2024:2024 introduces a new
PYTHON_EMAIL_DISABLE_STRICT_ADDR_PARSING environment variable. When you set this
variable to true, the previous, less strict parsing behavior is the default for the entire system:
export PYTHON_EMAIL_DISABLE_STRICT_ADDR_PARSING=true
However, individual calls to the affected functions can still enable stricter behavior.
You can achieve the same result by creating the /etc/python/email.cfg configuration file with the
following content:
[email_addr_parsing]
PYTHON_EMAIL_DISABLE_STRICT_ADDR_PARSING = true
For more information, see the Knowledgebase article Mitigation of CVE-2023-27043 introducing
stricter parsing of email addresses in Python.
Jira:RHELDOCS-17369
[1]
A new nodejs:20 module stream is fully supported
A new module stream, nodejs:20, previously available as a Technology Preview, is fully supported with
the release of the RHEA-2023:7252 advisory. The nodejs:20 module stream now provides Node.js
20.9, which is a Long Term Support (LTS) version.
CHAPTER 4. NEW FEATURES
41
Node.js 20 included in RHEL 9.3 provides numerous new features, bug fixes, security fixes, and
performance improvements over Node.js 18 available since RHEL 9.1.
Notable changes include:
The V8 JavaScript engine has been upgraded to version 11.3.
The npm package manager has been upgraded to version 9.8.0.
Node.js introduces a new experimental Permission Model.
Node.js introduces a new experimental Single Executable Application (SEA) feature.
Node.js provides improvements to the Experimental ECMAScript modules (ESM) loader.
The native test runner, introduced as an experimental node:test module in Node.js 18, is now
considered stable.
Node.js provides various performance improvements.
To install the nodejs:20 module stream, use:
# dnf module install nodejs:20
If you want to upgrade from the nodejs:18 stream, see Switching to a later stream .
For information about the length of support for the nodejs Application Streams, see Red Hat Enterprise
Linux Application Streams Life Cycle.
Bugzilla:2186717
A new filter argument to the Python tarfile extraction functions
To mitigate CVE-2007-4559, Python adds a filter argument to the tarfile extraction functions. The
argument allows turning tar features off for increased safety (including blocking the CVE-2007-4559
directory traversal attack). If a filter is not specified, the 'data' filter, which is the safest but most limited,
is used by default in RHEL. In addition, Python emits a warning when your application has been affected.
For more information, including instructions to hide the warning, see the Knowledgebase article
Mitigation of directory traversal attack in the Python tarfile library (CVE-2007-4559) .
Jira:RHELDOCS-16405
[1]
The HTTP::Tiny Perl module now verifies TLS certificates by default
The default value for the verify_SSL option in the HTTP::Tiny Perl module has been changed from 0 to
1 to verify TLS certificates when using HTTPS. This change fixes CVE-2023-31486 for HTTP::Tiny and
CVE-2023-31484 for the CPAN Perl module.
To make support for TLS verification available, this update adds the following dependencies to the perl-
HTTP-Tiny package:
perl-IO-Socket-SSL
perl-Mozilla-CA
perl-Net-SSLeay
Red Hat Enterprise Linux 9.3 9.3 Release Notes
42
Bugzilla:2228412
[1]
httpd rebased to version 2.4.57
The Apache HTTP Server has been updated to version 2.4.57, which provides bug fixes, enhancements,
and security fixes over version 2.4.53 available since RHEL 9.1.
Notable enhancements include:
The rotatelogs utility provided with httpd introduces a new -T option to truncate all rotated
logfiles except the initial log file.
The LDAPConnectionPoolTTL directive of the mod_ldap module now accepts negative values
to enable reuse of connections of any age. Previously, a negative value was handled as an error.
Workers from the mod_proxy_hcheck module now correctly time out according to the worker
timeout settings.
The hcmethod parameter of the mod_proxy_hcheck module now provides new GET11,
HEAD11, and OPTIONS11 methods for HTTP/1.1 requests.
Bugzilla:2184403
A new mod_authnz_fcgi module in httpd
The Apache HTTP Server now includes the mod_authnz_fcgi module, which enables FastCGI
authorizer applications to authenticate users and authorize access to resources.
The mod_authnz_fcgi module is not loaded by default. To load this module, uncomment the following
line in the /etc/httpd/conf.modules.d/00-optional.conf file:
LoadModule authnz_fcgi_module modules/mod_authnz_fcgi.so
Bugzilla:2173295
[1]
A new ssl_pass_phrase_dialog directive in nginx:1.22
With this update to the nginx:1.22 module stream, you can use the new ssl_pass_phrase_dialog
directive to configure an external program that is called at nginx start for each encrypted private key.
To use the new directive, add one of the following lines to the /etc/nginx/nginx.conf file:
To call an external program for each encrypted private key file, enter:
ssl_pass_phrase_dialog exec:<path_to_program>;
nginx calls this program with the following two arguments:
The server name specified in the server_name setting.
One of the following algorithms: RSA, DSA, EC, DH, or UNK if a cryptographic algorithm
cannot be recognized.
If you want to manually enter a passphrase for each encrypted private key file, enter:
ssl_pass_phrase_dialog builtin;
CHAPTER 4. NEW FEATURES
43
This is the default behavior if ssl_pass_phrase_dialog is not configured.
Note that the nginx service fails to start if you use this method but have at least one private key
protected by a passphrase. In this case, use one of the other methods.
If you want systemd to prompt for the passphrase for each encrypted private key when you
start the nginx service by using the systemctl utility, enter:
ssl_pass_phrase_dialog exec:/usr/libexec/nginx-ssl-pass-dialog;
Note that the ssl_pass_phrase_dialog directive in nginx is similar to the SSLPassPhraseDialog
directive in the Apache HTTP Server.
Bugzilla:2170808
A new rhel9/squid container image
The rhel9/squid container image is now available in the Red Hat Container Registry. Squid is a high-
performance proxy caching server for web clients, supporting FTP, gopher, and HTTP data objects.
Unlike traditional caching software, Squid handles all requests in a single, non-blocking, I/O-driven
process. Squid keeps metadata and especially hot objects cached in RAM, caches DNS lookups,
supports non-blocking DNS lookups, and implements negative caching of failed requests.
To pull the new container image, run:
# podman pull registry.redhat.io/rhel9/squid
Bugzilla:2178953
A new module stream: redis:7
Redis 7, an advanced key-value store, is now available as a new module stream, redis:7.
Notable changes over Redis 6 include:
Server-side scripting in the Redis Functions API
Fine-grained access control list (ACL) support
Shared publish/subscribe (pub/sub) support for clusters
Various new commands and command arguments
Redis 7 introduces several backward incompatible changes, for example:
Redis 7 now stores append-only files (AOF) as multiple files in a folder
Redis 7 uses a new version format for Redis Database (RDB) files that is incompatible with
earlier versions
For a complete list of features and incompatible changes, see the upstream release notes.
To install the redis:7 module stream, use:
# dnf module install redis:7
For information about the length of support for the redis Application Streams, see Red Hat Enterprise
Red Hat Enterprise Linux 9.3 9.3 Release Notes
44
For information about the length of support for the redis Application Streams, see Red Hat Enterprise
Linux Application Streams Life Cycle.
Bugzilla:2129826
4.13. COMPILERS AND DEVELOPMENT TOOLS
A new glibc option to influence optimized routine usage on IBM Z
On the IBM Z architecture, the glibc library selects function implementations based on the hardware
capabilities, such as hwcaps and stfle bits. With this update, you can direct the choice made by the
library by setting the glibc.cpu.hwcaps tunable.
Bugzilla:2169978
[1]
Improved string and memory routine performance on Intel® Xeon® v5-based hardware in
glibc
Previously, the default amount of cache used by glibc for string and memory routines resulted in lower
than expected performance on Intel® Xeon® v5-based systems. With this update, the amount of cache
to use has been tuned to improve performance.
Bugzilla:2213907
The system GCC compiler updated to version 11.4.1
The GNU Compiler Collection (GCC) provides tools for developing applications with the C, C++, and
Fortran programming languages.
The system GCC compiler has been updated to version 11.4.1, which includes numerous bug fixes and
enhancements available in the upstream GCC.
For usage information, see Developing C and C++ applications in RHEL 9 .
Bugzilla:2193180
GCC now supports preserving register arguments
With this update, you can now store argument register content to the stack and generate proper Call
Frame Information (CFI) to allow the unwinder to locate it without negatively impacting performance.
Bugzilla:2168204
[1]
A new -mdaz-ftz option in GCC on the 64-bit Intel architecture
The system version of GNU Compiler Collection (GCC) on the 64-bit Intel architecture now supports
the -mdaz-ftz option to enable flush-to-zero (FTZ) and denormals-are-zero (DAZ) flags in the MXCSR
Control and Status Register.
Bugzilla:2208908
New GCC Toolset 13
GCC Toolset 13 is a compiler toolset that provides recent versions of development tools. It is available as
an Application Stream in the form of a Software Collection in the AppStream repository.
The GCC compiler has been updated to version 13.1.1, which provides many bug fixes and enhancements
that are available in upstream GCC.
CHAPTER 4. NEW FEATURES
45
The following tools and versions are provided by GCC Toolset 13:
Tool Version
GCC 13.1.1
GDB 12.1
binutils 2.40
dwz 0.14
annobin 12.20
To install GCC Toolset 13, run the following command as root:
# dnf install gcc-toolset-13
To run a tool from GCC Toolset 13:
$ scl enable gcc-toolset-13 tool
To run a shell session where tool versions from GCC Toolset 13 override system versions of these tools:
$ scl enable gcc-toolset-13 bash
For more information, see GCC Toolset 13 and Using GCC Toolset.
Bugzilla:2171919
[1]
, Bugzilla:2171930
GCC Toolset 13: GCC rebased to version 13.1.1
In GCC Toolset 13, the GNU Compiler Collection (GCC) has been updated to version 13.1.1. Notable
changes include:
General improvements
OpenMP:
OpenMP 5.0: Fortran now supports some non-rectangular loop nests. Such support was
added for C/C++ in GCC 11.
Many OpenMP 5.1 features have been added.
Initial support for OpenMP 5.2 features has been added.
A new debug info compression option value, -gz=zstd, is now available.
The -Ofast, -ffast-math, and -funsafe-math-optimizations options no longer add startup code
to alter the floating-point environment when producing a shared object with the -shared
option.
GCC can now emit its diagnostics using Static Analysis Results Interchange Format (SARIF), a
Red Hat Enterprise Linux 9.3 9.3 Release Notes
46
GCC can now emit its diagnostics using Static Analysis Results Interchange Format (SARIF), a
JSON-based format suited for capturing the results of static analysis tools (such as GCC’s -
fanalyzer). You can also use SARIF to capture other GCC warnings and errors in a machine-
readable format.
Link-time optimization improvements have been implemented.
New languages and language-specific improvements
C family:
A new -Wxor-used-as-pow option warns about uses of the exclusive or ( ^) operator where the
user might have meant exponentiation.
Three new function attributes have been added for documenting int arguments that are file
descriptors:
attribute((fd_arg(N)))
attribute((fd_arg_read(N)))
attribute((fd_arg_write(N)))
These attributes are also used by -fanalyzer to detect misuses of file descriptors.
A new statement attribute, attribute((assume(EXPR)));, has been added for C++23 portable
assumptions. The attribute is supported also in C or earlier C++.
GCC can now control when to treat the trailing array of a structure as a flexible array member
for the purpose of accessing the elements of such an array. By default, all trailing arrays in
aggregates are treated as flexible array members. Use the new command-line option -fstrict-
flex-arrays to control what array members are treated as flexible arrays.
C:
Several C23 features have been implemented:
Introduced the nullptr constant.
Enumerations enhanced to specify underlying types.
Requirements for variadic parameter lists have been relaxed.
Introduced the auto feature to enable type inference for object definitions.
Introduced the constexpr specifier for object definitions.
Introduced storage-class specifiers for compound literals.
Introduced the typeof object (previously supported as an extension) and the
typeof_unqual object.
Added new keywords: alignas, alignof, bool, false, static_assert, thread_local, and true.
Added the [[noreturn]] attribute to specify that a function does not return execution to its
caller.
Added support for empty initializer braces.
CHAPTER 4. NEW FEATURES
47
Added support for STDC_VERSION_*_H header version macros.
Removed the ATOMIC_VAR_INIT macro.
Added the unreachable macro for the <stddef.h> header.
Removed trigraphs.
Removed unprototyped functions.
Added printf and scanf format checking through the -Wformat option for the %wN and
%wfN format length modifiers.
Added support for identifier syntax of Unicode Standard Annex (UAX) 31.
Existing features adopted in C23 have been adjusted to follow C23 requirements and are
not diagnosed using the -std=c2x -Wpedantic option.
A new -Wenum-int-mismatch option warns about mismatches between an enumerated type
and an integer type.
C++:
Implemented excess precision support through the -fexcess-precision option. It is enabled by
default in strict standard modes such as -std=c++17, where it defaults to -fexcess-
precision=standard. In GNU standard modes such as -std=gnu++20, it defaults to -fexcess-
precision=fast, which restores previous behavior.
The -fexcess-precision option affects the following architectures:
Intel 32- and 64-bit using x87 math, in some cases on Motorola 68000, where float and
double expressions are evaluated in long double precision.
64-bit IBM Z systems where float expressions are evaluated in double precision.
Several architectures that support the std::float16_t or std::bfloat16_t types, where these
types are evaluated in float precision.
Improved experimental support for C++23, including::
Added support for labels at the end of compound statements.
Added a type trait to detect reference binding to a temporary.
Reintroduced support for volatile compound operations.
Added support for the #warning directive.
Added support for delimited escape sequences.
Added support for named universal character escapes.
Added a compatibility and portability fix for the char8_t type.
Added static operator() function objects.
Simplified implicit moves.
Rewriting equality in expressions is now less of a breaking change.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
48
Removed non-encodable wide character literals and wide multicharacter literals.
Relaxed some constexpr function restrictions.
Extended floating-point types and standard names.
Implemented portable assumptions.
Added support for UTF-8 as a portable source file encoding standard.
Added support for static operator[] subscripts.
New warnings:
-Wself-move warns when a value is moved to itself with std::move.
-Wdangling-reference warns when a reference is bound to a temporary whose lifetime has
ended.
The -Wpessimizing-move and -Wredundant-move warnings have been extended to warn
in more contexts.
The new -nostdlib++ option enables linking with g++ without implicitly linking in the C++
standard library.
Changes in the libstdc++ runtime library
Improved experimental support for C++20, including:
Added the <format> header and the std::format function.
Added support in the <chrono> header for the std::chrono::utc_clock clock, other clocks,
time zones, and the std::format function.
Improved experimental support for C++23, including:
Additions to the <ranges> header: views::zip, views::zip_transform, views::adjacent,
views::adjacent_transform, views::pairwise, views::slide, views::chunk,
views::chunk_by, views::repeat, views::chunk_by, views::cartesian_product,
views::as_rvalue, views::enumerate, views::as_const.
Additions to the <algorithm> header: ranges::contains, ranges::contains_subrange,
ranges::iota, ranges::find_last, ranges::find_last_if, ranges::find_last_if_not,
ranges::fold_left, ranges::fold_left_first, ranges::fold_right, ranges::fold_right_last,
ranges::fold_left_with_iter, ranges::fold_left_first_with_iter.
Support for monadic operations for the std::expected class template.
Added constexpr modifiers to the std::bitset, std::to_chars and std::from_chars
functions.
Added library support for extended floating-point types.
Added support for the <experimental/scope> header from version 3 of the Library
Fundamentals Technical Specification (TS).
Added support for the <experimental/synchronized_value> header from version 2 of the
Concurrency TS.
CHAPTER 4. NEW FEATURES
49
Added support for many previously unavailable features in freestanding mode. For example:
The std::tuple class template is now available for freestanding compilation.
The libstdc++ library adds components to the freestanding subset, such as std::array and
std::string_view.
The libstdc++ library now respects the -ffreestanding compiler option, so it is no longer
necessary to build a separate freestanding installation of the libstdc++ library. Compiling
with -ffreestanding will restrict the available features to the freestanding subset, even if
the libstdc++ library was built as a full, hosted implementation.
New targets and target-specific Improvements
The 64-bit ARM architecture:
Added support for the armv9.1-a, armv9.2-a, and armv9.3-a arguments for the -march=
option.
The 32- and 64-bit AMD and Intel architectures:
For both C and C++, the __bf16 type is supported on systems with Streaming SIMD Extensions
2 and above enabled.
The real __bf16 type is now used for AVX512BF16 instruction intrinsics. Previously, __bfloat16,
a typedef of short, was used. Adjust your AVX512BF16 related source code when upgrading
GCC 12 to GCC 13.
Added new Instruction Set Architecture (ISA) extensions to support the following Intel
instructions:
AVX-IFMA whose instruction intrinsics are available through the -mavxifma compiler
switch.
AVX-VNNI-INT8 whose instruction intrinsics are available through the -mavxvnniint8
compiler switch.
AVX-NE-CONVERT whose instruction intrinsics are available through the -mavxneconvert
compiler switch.
CMPccXADD whose instruction intrinsics are available through the -mcmpccxadd compiler
switch.
AMX-FP16 whose instruction intrinsics are available through the -mamx-fp16 compiler
switch.
PREFETCHI whose instruction intrinsics are available through the -mprefetchi compiler
switch.
RAO-INT whose instruction intrinsics are available through the -mraoint compiler switch.
AMX-COMPLEX whose instruction intrinsics are available through the -mamx-complex
compiler switch.
GCC now supports AMD CPUs based on the znver4 core through the -march=znver4 compiler
switch. The switch makes GCC consider using 512-bit vectors when auto-vectorizing.
Improvements to the static analyzer
Red Hat Enterprise Linux 9.3 9.3 Release Notes
50
The static analyzer has gained 20 new warnings:
-Wanalyzer-allocation-size
-Wanalyzer-deref-before-check
-Wanalyzer-exposure-through-uninit-copy
-Wanalyzer-imprecise-fp-arithmetic
-Wanalyzer-infinite-recursion
-Wanalyzer-jump-through-null
-Wanalyzer-out-of-bounds
-Wanalyzer-putenv-of-auto-var
-Wanalyzer-tainted-assertion
Seven new warnings relating to misuse of file descriptors:
-Wanalyzer-fd-access-mode-mismatch
-Wanalyzer-fd-double-close
-Wanalyzer-fd-leak
-Wanalyzer-fd-phase-mismatch (for example, calling accept on a socket before calling
listen on it)
-Wanalyzer-fd-type-mismatch (for example, using a stream socket operation on a
datagram socket)
-Wanalyzer-fd-use-after-close
-Wanalyzer-fd-use-without-check
Also implemented special-casing handling of the behavior of the open, close, creat,
dup, dup2, dup3, pipe, pipe2, read, and write functions.
Four new warnings for misuses of the <stdarg.h> header:
-Wanalyzer-va-list-leak warns about missing a va_end macro after a va_start or
va_copy macro.
-Wanalyzer-va-list-use-after-va-end warns about a va_arg or va_copy macro used on
a va_list object type that has had the va_end macro called on it.
-Wanalyzer-va-arg-type-mismatch type-checks va_arg macro usage in
interprocedural execution paths against the types of the parameters that were actually
passed to the variadic call.
-Wanalyzer-va-list-exhausted warns if a va_arg macro is used too many times on a
va_list object type in interprocedural execution paths.
Numerous other improvements.
CHAPTER 4. NEW FEATURES
51
Backwards incompatible changes
For C++, construction of global iostream objects such as std::cout, std::cin is now done inside the
standard library, instead of in every source file that includes the <iostream> header. This change
improves the startup performance of C++ programs, but it means that code compiled with GCC 13.1 will
crash if the correct version of libstdc++.so is not used at runtime. See the documentation about using
the correct libstdc++.so at runtime. Future GCC releases will mitigate the problem so that the program
cannot be run at all with an earlier incompatible libstdc++.so.
Bugzilla:2172093
[1]
GCC Toolset 13: annobin rebased to version 12.20
GCC Toolset 13 provides the annobin package version 12.20. Notable enhancements include:
Added support for moving annobin notes into a separate debug info file. This results in
reduced executable binary size.
Added support for a new smaller note format reduces the size of the separate debuginfo files
and the time taken to create these files.
Bugzilla:2171923
[1]
GCC Toolset 13: GDB rebased to version 12.1
GCC Toolset 13 provides GDB version 12.1.
Notable bug fixes and enhancements include:
GDB now styles source code and disassembler by default. If styling interferes with automation
or scripting of GDB, you can disable it by using the maint set gnu-source-highlight enabled
off and maint set style disassembler enabled off commands.
GDB now displays backtraces whenever it encounters an internal error. If this affects scripts or
automation, you can use the maint set backtrace-on-fatal-signal off command to disable this
feature.
C/C++ improvements:
GDB now treats functions or types involving C++ templates similarly to function overloads. You
can omit parameter lists to set breakpoints on families of template functions, including types or
functions composed of multiple template types. Tab completion has gained similar
improvements.
Terminal user interface (TUI):
tui layout
tui focus
tui refresh
tui window height
These are the new names for the old layout, focus, refresh, and winheight TUI commands. The
old names still exist as aliases to these new commands.
tui window width
winwidth
Red Hat Enterprise Linux 9.3 9.3 Release Notes
52
Use the new tui window width command, or the winwidth alias, to adjust the width of a TUI
window when windows are laid out in horizontal mode.
info win
This command now includes information about the width of the TUI windows in its output.
Machine Interface (MI) changes:
The default version of the MI interpreter is now 4 (-i=mi4).
The -add-inferior command with no flag now inherits the connection of the current inferior. This
restores the behavior of GDB before version 10.
The -add-inferior command now accepts a --no-connection flag that causes the new inferior to
start without a connection.
The script field in breakpoint output (which is syntactically incorrect in MI 3 and earlier) has
become a list in MI 4. This affects the following commands and events:
-break-insert
-break-info
=breakpoint-created
=breakpoint-modified
Use the -fix-breakpoint-script-output command to enable the new behavior with earlier MI
versions.
New commands:
maint set internal-error backtrace [on|off]
maint show internal-error backtrace
maint set internal-warning backtrace [on|off]
maint show internal-warning backtrace
GDB can now print a backtrace of itself when it encounters internal error or internal warning.
This is enabled by default for internal errors and disabled by default for internal warnings.
exit
You can exit GDB using the new exit command in addition to the existing quit command.
maint set gnu-source-highlight enabled [on|off]
maint show gnu-source-highlight enabled
Enables or disables the GNU Source Highlight library for adding styling to source code. When
disabled, the library is not used even if it is available. When the GNU Source Highlight library is
not used the Python Pygments library is used instead.
set suppress-cli-notifications [on|off]
show suppress-cli-notifications
Controls if printing the notifications is suppressed for CLI or not. CLI notifications occur when
you change the selected context (such as the current inferior, thread, or frame), or when the
program being debugged stops (for example: because of hitting a breakpoint, completing
source-stepping, or an interrupt).
CHAPTER 4. NEW FEATURES
53
set style disassembler enabled [on|off]
show style disassembler enabled
When enabled, the command applies styling to disassembler output if GDB is compiled with
Python support and the Python Pygments package is available.
Changed commands:
set logging [on|off]
Deprecated and replaced by the set logging enabled [on|off] command.
print
Printing of floating-point values with base-modifying formats such as /x has been changed to
display the underlying bytes of the value in the required base.
clone-inferior
The clone-inferior command now ensures that the TTY, CMD, and ARGs settings are copied
from the original inferior to the new one. All modifications to the environment variables done
using the set environment or unset environment commands are also copied to the new
inferior.
Python API:
The new gdb.add_history() function takes a gdb.Value object and adds the value it represents
to GDB’s history list. The function returns an integer, which is the index of the new item in the
history list.
The new gdb.history_count() function returns the number of values in GDB’s value history.
The new gdb.events.gdb_exiting event is called with a gdb.GdbExitingEvent object that has
the read-only attribute exit_code containing the value of the GDB exit code. This event is
triggered before GDB’s exit before GDB starts to clean up its internal state.
The new gdb.architecture_names() function returns a list containing all of the possible
Architecture.name() values. Each entry is a string.
The new gdb.Architecture.integer_type() function returns an integer type given a size and a
signed-ness.
The new gdb.TargetConnection object type represents a connection (as displayed by the info
connections command). A sub-class, gdb.RemoteTargetConnection, represents remote and
extended-remote connections.
The gdb.Inferior type now has a connection property that is an instance of the
gdb.TargetConnection object, the connection used by this inferior. This can be None if the
inferior has no connection.
The new gdb.events.connection_removed event registry emits a gdb.ConnectionEvent
event when a connection is removed from GDB. This event has a connection property, a
gdb.TargetConnection object for the connection being removed.
The new gdb.connections() function returns a list of all currently active connections.
The new gdb.RemoteTargetConnection.send_packet(PACKET) method is equivalent to the
existing maint packet CLI command. You can use it to send a specified packet to the remote
target.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
54
The new gdb.host_charset() function returns the name of the current host character set as a
string.
The new gdb.set_parameter(NAME, VALUE) function sets the GDB parameter NAME to
VALUE.
The new gdb.with_parameter(NAME, VALUE) function returns a context manager that
temporarily sets the GDB parameter NAME to VALUE and then resets it when the context is
exited.
The gdb.Value.format_string method now takes a styling argument, which is a boolean. When
true, the returned string can include escape sequences to apply styling. The styling is present
only if styling is turned on in GDB (see help set styling). When false, which is the default if the
styling argument is not given, no styling is applied to the returned string.
The new read-only attribute gdb.InferiorThread.details is either a string containing additional
target-specific thread-state information, or None if there is no such additional information.
The new read-only attribute gdb.Type.is_scalar is True for scalar types, and False for all other
types.
The new read-only attribute gdb.Type.is_signed should only be read when Type.is_scalar is
True, and will be True for signed types and False for all other types. Attempting to read this
attribute for non-scalar types will raise a ValueError.
You can now add GDB and MI commands implemented in Python.
For more information see the upstream release notes:
What has changed in GDB?
Bugzilla:2172096
[1]
GCC Toolset 13: bintuils rebased to version 2.40
GCC Toolset 13 provides the binutils package version 2.40. Notable enhancements include:
Linkers:
The new -w (--no-warnings) command-line option for the linker suppresses the generation of
any warning or error messages. This is useful in case you need to create a known non-working
binary.
The ELF linker now generates a warning message if:
The stack is made executable
It creates a memory resident segment with all three of the Read, Write and eXecute
permissions set
It creates a thread local data segment with the eXecute permission set.
You can disable these warnings by using the --no-warn-exec-stack or --no-warn-rwx-
segments options.
The linker can now insert arbitrary JSON-format metadata into binaries that it creates.
Other tools:
CHAPTER 4. NEW FEATURES
55
A new the objdump tool’s --private option to display fields in the file header and section
headers for Portable Executable (PE) format files.
A new --strip-section-headers command-line option for the objcopy and strip utilities to
remove the ELF section header from ELF files.
A new --show-all-symbols command-line option for the objdump utility to display all symbols
that match a given address when disassembling, as opposed to the default function of displaying
only the first symbol that matches an address.
A new -W (--no-weak) option to the nm utility to make it ignore weak symbols.
The objdump utility now supports syntax highlighting of disassembler output for some
architectures. Use the --disassembler-color=MODE command-line option, with MODE being
one of the following:
off
color - This option is supported by all terminal emulators.
extended-color - This option uses 8-bit colors not supported by all terminal emulators.
Bugzilla:2171926
[1]
libabigail rebased to version 2.3
The libabigail package has been updated to version 2.3. Notable improvements include:
The BTF debuginfo format is now supported.
Improved support for Ada range types.
A new [allow_type] directive in suppression specifications is now supported.
Added various new properties for the [supress_type] suppression specification.
The ABIXML file format has been updated to version 2.2.
The SONAME of the library has been changed to reflect its own ABI change.
The libabigail package is available in the CodeReady Linux Builder (CRB) repository. Note that
packages included in the CodeReady Linux Builder repository are unsupported.
Bugzilla:2186931
The find-debuginfo script in debugedit now supports the -q (--quiet) flag
With this update, you can use the find-debuginfo script’s -q (--quiet) flag in the debugedit utility to
silence non-error output from the script.
Bugzilla:2177302
Valgrind rebased to version 3.21.0
Valgrind has been updated to version 3.21.0. Notable enhancements include:
A new abexit value for the --vgdb-stop-at=event1,event2,… option notifies the gdbserver
utility when your program exits abnormally, such as with a nonzero exit code.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
56
A new --enable-debuginfod=[yes|no] option instructs Valgrind to use the debuginfod servers
listed in the DEBUGINFOD_URLS environment variable to fetch any missing DWARF
debuginfo information for the program running under Valgrind. The default value for this option
is yes.
NOTE
The DEBUGINFOD_URLS environment variable is not set by default.
Valgrind now provides GDB Python commands. These GDB front end commands provide a
better integration in the GDB command-line interface. Benefits of this are, for example, GDB
auto-completion, and command-specific help, searching for a command or command help that
matches a regular expression. For relevant monitoring commands, GDB evaluates arguments to
simplify usage of monitor commands.
The vgdb utility now supports the extended remote protocol when invoked with the --multi
option. The GDB run command is supported in this mode and, as a result, you can run GDB and
Valgrind from a single terminal.
You can use the --realloc-zero-bytes-frees=[yes|no] option to change the behavior of the
realloc() function with a size of zero for tools that intercept the malloc() call.
The memcheck tool now performs checks for the use of the realloc() function with a size of
zero. Use the new --show-realloc-size-zero=[yes|no] switch to disable this feature.
You can use the new --history-backtrace-size=value option for the helgrind tool to configure
the number of entries to record in the stack traces of earlier accesses.
The --cache-sim=[yes|no] cachegrind option now defaults to no and, as a result, only
instruction cache read events are gathered by default.
The source code for the cg_annotate, cg_diff, and cg_merge cachegrind utilities has been
rewritten and, as a result, the utilities have more flexible command line option handling. For
example, they now support the --show-percs and --no-show-percs options and the existing --
show-percs=yes and --show-percs=no options.
The cg_annotate cachegrind utility now supports diffing (using the --diff, --mod-filename,
and --mod-funcname options) and merging (by passing multiple data files). In addition,
cg_annotate now provides more information at the file and function level.
A new user-request for the DHAT tool allows you to override the 1024 byte limit on access
count histograms for blocks of memory.
The following new architecture-specific instruction sets are now supported:
64-bit ARM:
v8.2 scalar and vector Floating-point Absolute Difference (FABD), Floating-point Absolute
Compare Greater than or Equal (FACGE), Floating-point Absolute Compare Greater Than
(FACGT), and Floating-point Add (FADD) instructions.
v8.2 Floating-point (FP) compare and conditional compare instructions.
Zero variants of v8.2 Floating-point (FP) compare instructions.
64-bit IBM Z:
CHAPTER 4. NEW FEATURES
57
Support for the miscellaneous-instruction-extensions facility 3 and the vector-
enhancements facility 2. This enables programs compiled with the -march=arch13 or -
march=z15 options to be executed under Valgrind.
IBM Power:
ISA 3.1 support is now complete.
ISA 3.0 now supports the deliver a random number (darn) instruction.
ISA 3.0 now supports the System Call Vectored (scv) instruction.
ISA 3.0 now supports the copy, paste, and cpabort instructions.
Bugzilla:2124346
systemtap rebased to version 4.9
The systemtap package has been upgraded to version 4.9. Notable changes include:
A new Language-Server-Protocol (LSP) backend for easier interactive drafting of systemtap
scripts on LSP-capable editors.
Access to a Python/Jupyter interactive notebook front end.
Improved handling of DWARF 5 bit fields.
Bugzilla:2186934
elfutils rebased to version 0.189
The elfutils package has been updated to version 0.189. Notable improvements and bug fixes include:
libelf
The elf_compress tool now supports the ELFCOMPRESS_ZSTD ELF compression type.
libdwfl
The dwfl_module_return_value_location function now returns 0 (no return type) for DWARF
Information Entries (DIEs) that point to a DW_TAG_unspecified_type type tag.
eu-elfcompress
The -t and --type= options now support the Zstandard ( zstd) compression format via the zstd
argument.
Bugzilla:2182061
libpfm rebased to version 4.13
The libpfm package has been updated to version 4.13. With this update, libpfm can access performance
monitoring hardware native events for the following processor microarchitectures:
AMD Zen 2
AMD Zen 3
AMD Zen 4
ARM Neoverse N1
Red Hat Enterprise Linux 9.3 9.3 Release Notes
58
ARM Neoverse N2
ARM Neoverse V1
ARM Neoverse V2
IBM z16
4th Generation Intel® Xeon® Scalable Processors
Bugzilla:2185652, Bugzilla:2047720, Bugzilla:2111940, Bugzilla:2111924, Bugzilla:2111930, Bugzilla:2111933,
Bugzilla:2111957, Bugzilla:2111946
papi supports new processor microarchitectures
With this enhancement, you can access performance monitoring hardware using papi events presets on
the following processor microarchitectures:
AMD Zen 2
AMD Zen 3
ARM Neoverse N1
ARM Neoverse N2
ARM Neoverse V1
ARM Neoverse V2
Bugzilla:2111923
[1]
, Bugzilla:2111947, Bugzilla:2111942
papi now supports fast performance event count read operations for 64-bit ARM
processors
Previously on 64-bit ARM processors, all performance event counter read operations required the use
of a resource-intensive system call. papi has been updated for 64-bit ARM to let processes monitoring
themselves with the performance counters use a faster user-space read of the performance event
counters. Setting the /proc/sys/kernel/perf_user_access parameter to 1 reduces the average number
of clock cycles for papi to read 2 counters from 724 cycles to 29 cycles.
Bugzilla:2186927
[1]
LLVM Toolset rebased to version 16.0.6
LLVM Toolset has been updated to version 16.0.6.
Notable enhancements include:
Improvements to optimization
Support for new CPU extensions
Improved support for new C++ versions.
Notable backwards incompatible changes include:
Clang’s default C++ standard is now gnu++17 instead of gnu++14.
CHAPTER 4. NEW FEATURES
59
The -Wimplicit-function-declaration, -Wimplicit-int and -Wincompatible-function-pointer-
types options now default to error for C code. This might affect the behavior of configure
scripts.
By default, Clang 16 uses the libstdc++ library version 13 and binutils 2.40 provided by GCC Toolset 13.
For more information, see the LLVM release notes and Clang release notes.
Bugzilla:2178796
Rust Toolset rebased to version 1.71.1
Rust Toolset has been updated to version 1.71.1. Notable changes include:
A new implementation of multiple producer, single consumer (mpsc) channels to improve
performance
A new Cargo sparse index protocol for more efficient use of the crates.io registry
New OnceCell and OnceLock types for one-time value initialization
A new C-unwind ABI string to enable usage of forced unwinding across Foreign Function
Interface (FFI) boundaries
For more details, see the series of upstream release announcements:
Announcing Rust 1.67.0
Announcing Rust 1.68.0
Announcing Rust 1.69.0
Announcing Rust 1.70.0
Announcing Rust 1.71.0
Bugzilla:2191743
The Rust profiler_builtins runtime component is now available
With this enhancement, the Rust profile_builtins runtime component is now available. This runtime
component enables the following compiler options:
-C instrument-coverage
Enables coverage profiling
-C profile-generate
Enables profile-guided optimization
Bugzilla:2227082
[1]
Go Toolset rebased to version 1.20.10
Go Toolset has been updated to version 1.20.10.
Notable enhancements include:
New functions added in the unsafe package to handle slices and strings without depending on
Red Hat Enterprise Linux 9.3 9.3 Release Notes
60
New functions added in the unsafe package to handle slices and strings without depending on
the internal representation.
Comparable types can now satisfy comparable constraints.
A new crypto/ecdh package.
The go build and go test commands no longer accept the -i flag.
The go generate and go test commands now accept the -skip pattern option.
The go build, go install, and other build-related commands now support the -pgo and -cover
flags.
The go command now disables cgo by default on systems without a C toolchain.
The go version -m command now supports reading more Go binaries types.
The go command now disables cgo by default on systems without a C toolchain.
Added support for collecting code coverage profiles from applications and integration tests
instead of collecting them only from unit tests.
Bugzilla:2185259
[1]
pcp rebased to version 6.0.5
The pcp package has been updated to version 6.0.5. Notable changes include:
Collector tool features
pmdaproc:
Added support for per-cgroup IRQ PSI metrics in recent kernels
Added a new proc.smaps.pss_dirty metric
pmdasmart: Added NVME disk information and power state metrics
pmdalinux:
Added support for system wide IRQ PSI metrics in recent kernels
Added NUMA external memory fragmentation metric
Added new networking (TCP, ICMP) metrics
pmdaoverhead: A new PMDA to measure overhead for groups of processes
pmdahacluster: Updated to handle Pacemaker 2.1.5 crm_mon output changes
Monitoring tool features
pmieconf:
Added support for webhook actions (Event Driven Ansible)
Added a new pmie rule that checks file descriptor limits
CHAPTER 4. NEW FEATURES
61
pcp2json: Extended pcp2json with an option to send HTTP POSTs
pcp-atop: Added cgroup, NUMA memory, and NUMA CPU support
pcp-htop: Added support for a new open file descriptors Meter
pcp-ps: Added capability to show multiple archive samples
Bugzilla:2175602
PCP’s pmie utility now supports generating webhook events
The Performance Metrics Inference Engine (pmie) utility from Performance Co-Pilot (PCP) now
supports generating webhook events. With this update, configured pmie rules generate events in a
format consumable by Event-Driven Ansible (EDA). As a result, EDA can respond to PCP rules.
To enable this feature, configure all local pmie rules to send to a webhook at a given endpoint (URL):
# pmieconf modify global webhook_endpoint https://localhost:443/<endpoint>
# pmieconf modify global webhook_action yes
Bugzilla:2185803
grafana rebased to version 9.2.10
The grafana package has been updated to version 9.2.10. Notable changes include:
The heatmap panel is now used throughout Grafana.
Geomaps can now measure both distance and area.
The Alertmanager is now based on Prometheus Alertmanager version 0.24.
Grafana Alerting rules now return an Error state by default on execution error or timeout.
Expressions can now be used on public dashboards.
The join transformation now supports inner joins.
Public dashboards now allow sharing Grafana dashboards.
A new Prometheus streaming parser is now available as an opt-in feature.
For more information, see the upstream release notes:
What’s new in Grafana v9.1
What’s new in Grafana v9.2
Bugzilla:2193018
Grafana no longer enables weak cryptographic ciphers
With this update, Grafana no longer enables ciphers that are considered weak for encrypting secure
communication. The affected ciphers are:
AES128-GCM-SHA256
Red Hat Enterprise Linux 9.3 9.3 Release Notes
62
AES128-SHA
AECDHE-RSA-AES128-SHA
AES256-GCM-SHA384
AES256-SHA
ECDHE-RSA-AES256-SHA
Bugzilla:2190025
[1]
.NET 8.0 is available
Red Hat Enterprise Linux 9.3 is distributed with .NET version 8.0. Notable improvements include:
Added support for the C#12 and F#8 language versions.
Added support for building container images using the .NET Software Development Kit directly.
Many performance improvements to the garbage collector (GC), Just-In-Time (JIT) compiler,
and the base libraries.
Jira:RHELPLAN-164399
[1]
4.14. IDENTITY MANAGEMENT
samba rebased to version 4.18.6
The samba packages have been upgraded to upstream version 4.18.6, which provides bug fixes and
enhancements over the previous version. The most notable changes:
Security improvements in previous releases impacted the performance of the Server Message
Block (SMB) server for high metadata workloads. This update improves the performance in this
scenario.
The new wbinfo --change-secret-at=<domain_controller> command enforces the change of
the trust account password on the specified domain controller.
By default, Samba stores access control lists (ACLs) in the security.NTACL extended attribute
of files. You can now customize the attribute name with the acl_xattr:<security_acl_name>
setting in the /etc/samba/smb.conf file. Note that a custom extended attribute name is not a
protected location as security.NTACL. Consequently, users with local access to the server can
be able to modify the custom attribute’s content and compromise the ACL.
Note that the server message block version 1 (SMB1) protocol has been deprecated since Samba 4.11
and will be removed in a future release.
Back up the database files before starting Samba. When the smbd, nmbd, or winbind services start,
Samba automatically updates its tdb database files. Red Hat does not support downgrading tdb
database files.
After updating Samba, use the testparm utility to verify the /etc/samba/smb.conf file.
Bugzilla:2190415
The ipaclient role now allows configuring user subID ranges on the IdM level
CHAPTER 4. NEW FEATURES
63
With this update, the ipaclient ansible-freeipa role provides the ipaclient_subid option, using which
you can configure subID ranges on the Identity Management (IdM) level. Without the new option set
explicitly to true, the ipaclient role keeps the default behavior and installs the client without subID
ranges configured for IdM users.
Previously, the role configured the sssd authselect profile that in turn customized the
/etc/nsswitch.conf file. The subID database did not use IdM and relied only on the local files of
/etc/subuid and /etc/subgid.
Bugzilla:2175767
Multiple IdM groups and services can now be managed in a single Ansible task
With this enhancement in ansible-freeipa, you can add, modify, and delete multiple Identity
Management (IdM) user groups and services by using a single Ansible task. For that, use the groups and
services options of the ipagroup and ipaservice modules.
Using the groups option available in ipagroup, you can specify multiple group variables that only apply
to a particular group. This group is defined by the name variable, which is the only mandatory variable
for the groups option.
Similarly, using the services option available in ipaservice, you can specify multiple service variables
that only apply to a particular service. This service is defined by the name variable, which is the only
mandatory variable for the services option.
Jira:RHELDOCS-16474
[1]
ansible-freeipa ipaserver role now supports Random Serial Numbers
With this update, you can use the ipaserver_random_serial_numbers=true option with the ansible-
freeipa ipaserver role. This way, you can generate fully random serial numbers for certificates and
requests in PKI when installing an Identity Management (IdM) server using Ansible. With RSNv3, you can
avoid range management in large IdM installations and prevent common collisions when reinstalling IdM.
IMPORTANT
RSNv3 is supported only for new IdM installations. If enabled, it is required to use RSNv3
on all PKI services.
Jira:RHELDOCS-16462
[1]
ipa rebased to version 4.10.2
The ipa package has been upgraded to version 4.10.2. Notable changes include:
Searching and listing certificates in the IdM CLI and Web UI now offer better performance.
For more information, see the upstream FreeIPA release notes.
Bugzilla:2196426
The ipaserver_remove_on_server and ipaserver_ignore_topology_disconnect options are now
available in the ipaserver role
If removing a replica from an Identity Management (IdM) topology by using the
remove_server_from_domain option of the ipaserver ansible-freeipa role leads to a disconnected
topology, you must now specify which part of the domain you want to preserve. Specifically, you must do
Red Hat Enterprise Linux 9.3 9.3 Release Notes
64
the following:
Specify the ipaserver_remove_on_server value to identify which part of the topology you
want to preserve.
Set ipaserver_ignore_topology_disconnect to True.
Note that if removing a replica from IdM by using the remove_server_from_domain option preserves a
connected topology, neither of these options is required.
Bugzilla:2127903
IdM now supports the min_lifetime parameter
With this enhancement, the min_lifetime parameter has been added to the /etc/gssproxy/*.conf file.
The min_lifetime parameter triggers the renewal of a service ticket in case its remaining lifetime is lower
than this value.
By default its value is 15 seconds. For network volume clients such as NFS, to reduce the risk of losing
access in case the KDC is momentarily unavailable, set this value to 60 seconds.
Bugzilla:2181465
You can now manage IdM certificates using the ipacert Ansible module
You can now use the ansible-freeipa ipacert module to request or retrieve SSL certificates for Identity
Management (IdM) users, hosts and services. The users, hosts and services can then use these
certificates to authenticate to IdM. You can also revoke the certificates, and restore certificates that
have been put on hold.
Bugzilla:2127907
The optional_pac_tkt_chksum option helps preserve interoperability between different
versions of krb5
You can now use the optional_pac_tkt_chksum option to preserve the interoperability between RHEL
Kerberos Distribution Center (KDC) servers running different versions of the krb5 package. Specifically,
you can change their behavior regarding Privilege Attribute Certificate (PAC) ticket signature
verification. If you set the optional_pac_tkt_chksum string attribute to true for the Kerberos principal
expected to sign a ticket, then the KDC does not reject service for user (S4U) requests containing a
ticket that lacks the PAC ticket signature. The principal to sign the ticket is the ticket-granting service
(TGS) one or a cross-realm TGS one, depending on the realm of the ticket’s target service.
Since the krb5-1.20 release, MIT Kerberos KDCs have required the presence of ticket signatures in
PACs based on the encrypted part of Kerberos tickets so that they could process S4U requests
successfully. Previously, this was a problem in gradual upgrade scenarios where certain KDCs used krb5-
1.19 or older, while others used krb5-1.20 or newer. KDCs using the newer versions of krb5 for S4U
requests rejected service tickets that were provided by KDCs using the older versions of krb5 if a service
used them for S4U requests.
For more information about how this feature is used in Identity Management (IdM), see this pull request.
Bugzilla:2178298
IdM now supports resource-based constrained delegation
With this update, IdM now supports resource-based constrained delegation (RBCD). RBCD allows a
CHAPTER 4. NEW FEATURES
65
With this update, IdM now supports resource-based constrained delegation (RBCD). RBCD allows a
granular control of delegation on a resource level and access can be set by the owner of the service to
which credentials are delegated.
RBCD can be useful, for example, in an integration between IdM and Active Directory (AD), because AD
enforces the use of RBCD when both target and proxy services belong to different forests.
IMPORTANT
Currently, only services in the IdM domain can be configured with RBCD rules. If the
target service is part of an AD domain, the permission can only be granted on the AD side.
As AD domain controllers cannot resolve IdM service information to create the rule, this is
not currently supported.
For more information on delegation scenarios, see the FreeIPA design page.
Bugzilla:2165880
RHEL 9.3 provides 389-ds-base 2.3.4
RHEL 9.3 is distributed with the 389-ds-base package version 2.3.4. Notable bug fixes and
enhancements over version 2.3.4 include:
https://www.port389.org/docs/389ds/releases/release-2-2-8.html
https://www.port389.org/docs/389ds/releases/release-2-2-9.html
https://www.port389.org/docs/389ds/releases/release-2-3-0.html
https://www.port389.org/docs/389ds/releases/release-2-3-1.html
https://www.port389.org/docs/389ds/releases/release-2-3-2.html
https://www.port389.org/docs/389ds/releases/release-2-3-3.html
https://www.port389.org/docs/389ds/releases/release-2-3-4.html
Bugzilla:2188627
Directory Server can now close a client connection if a bind operation fails
Previously, when a bind operation failed, some applications that ignore the bind return code could load
Director Server with further requests.
With the new nsslapd-close-on-failed-bind configuration attribute under the cn=config entry, the
server can close a client connection when the bind operation fails. As a result, the server load can be
reduced.
Bugzilla:1987471
Automembership plug-in improvements. It no longer cleans up groups by default
Previously, the automember rebuild task went through all the automember rules and removed all the
memberships, then the task rebuilt the memberships from scratch. Thus, the rebuild task was expensive,
especially if other be_txn plugins are enabled.
With this update, the Automembership plug-in has the following improvements:
Red Hat Enterprise Linux 9.3 9.3 Release Notes
66
Only one rebuilt task is allowed at a time.
The Automembership plug-in now does not clean up previous members by default. Use the new
CLI option --cleanup to intentionally clean up memberships before rebuilding from scratch:
# dsconf slapd-instance_name plugins automember fixup -f objectclass=posixaccount -s sub
--cleanup "ou=people,dc=example,dc=com"
Improved logging to show fixup progress.
Bugzilla:2149025
New passwordAdminSkipInfoUpdate: on/off configuration option is now available
You can add a new passwordAdminSkipInfoUpdate: on/off setting under the cn=config entry to
provide a fine grained control over password updates performed by password administrators. When you
enable this setting, password updates do not update certain attributes, for example,
passwordHistory,passwordExpirationTime,passwordRetryCount, pwdReset, and
passwordExpWarned.
Bugzilla:2166332
New slapi_memberof() plug-in function is now available for Directory Server plug-ins and
client applications
The new slapi_memberof() function retrieves distinguished names (DNs) of groups to which the given
entry belongs directly or indirectly. Previously, MemberOf, Referential Integrity, and ACL plug-ins
implemented their own mechanism to retrieve such groups. With this update, you can use the
slapi_memberof() function that introduces a unified mechanism to return group DNs.
Bugzilla:2189946
Directory Server now replaces the virtual attribute nsRole with an indexed attribute for
managed and filtered roles
Previously, LDAP searches that contained the virtual attribute nsRole in the filter were time consuming
because that attribute cannot be indexed. With this update, when you perform the ldapsearch with
virtual attribute nsRole in the filter, Directory Server replaces the nsRole attribute the following way:
For managed roles, the nsRole attribute is replaced with the nsRoleDN attribute.
For filtered roles, the nsRole attribute is replaced with the nsRoleFilter attribute.
As a result, response time for search with the nsRole attribute improves because the search becomes
indexed.
Note that this update does not apply to nested roles.
Bugzilla:2189954
New nsslapd-numlisteners configuration option is now available
The nsslapd-numlisteners attribute specifies the number of listener threads Directory Server can use
to monitor established connections. You can improve the response times when the server experiences a
large number of client connection by increasing the attribute value.
Bugzilla:1975930
CHAPTER 4. NEW FEATURES
67
IdM supports the option to control the encryption type used to sign the PAC
By default, the Kerberos Key Distribution Center (KDC) generates an AES HMAC-SHA2 signature for
the Privilege Attribute Certificate (PAC). However, this encryption type is not supported by Active
Directory (AD). As a result, AD cross-realm constrained delegation requests are not processed correctly.
With this enhancement, you can now control the encryption type used to sign the PAC by setting the
pac_privsvr_entype attribute on the TGS principal, krbtgt/[realm]@[realm], to the required encryption
type for the target realm. In IdM, this string attribute is automatically configured when an AD trust exists.
WARNING: This update is about standalone MIT realms. Do not change the Kerberos Distribution
Center (KDC) configuration in RHEL Identity Management.
For example, for an MIT realm and an AD realm, to ensure cross-realm ticket-granting tickets (TGT) use
AD-compatible encryption types, an administrator must configure the cross-realm TGS principal as
shown below on the MIT side. This results in cross-realm TGTs using the AES 256 HMAC-SHA1
encryption type and constrained delegation requests being processed correctly.
kadmin.local <<EOF
setstr krbtgt/AD@IPA pac_privsvr_enctype aes256-cts-hmac-sha1-96
setstr krbtgt/IPA@AD pac_privsvr_enctype aes256-cts-hmac-sha1-96
EOF
Bugzilla:2060421
Identity Management API is now fully supported
The Identity Management (IdM) API was available as a Technology Preview in RHEL 9.2 and as of RHEL
9.3, it is fully supported.
Users can use existing tools and scripts even if the IdM API is enhanced to enable multiple versions of
API commands. These enhancements do not change the behavior of a command in an incompatible way.
This has the following benefits:
Administrators can use previous or later versions of IdM on the server than on the managing
client.
Developers can use a specific version of an IdM call, even if the IdM version changes on the
server.
The communication with the server is possible, regardless if one side uses, for example, a newer version
that introduces new options for a feature.
NOTE
While IdM API provides a JSON-RPC interface, this type of access is not supported. Red Hat
recommends accessing the API with Python instead. Using Python automates important parts such
as the metadata retrieval from the server, which allows listing all available commands.
Bugzilla:1513934
4.15. GRAPHICS INFRASTRUCTURES
Intel Arc A-Series graphics is now fully supported
The Intel Arc A-Series graphics (Alchemist or DG2) feature, previously available as a Technology
Red Hat Enterprise Linux 9.3 9.3 Release Notes
68
The Intel Arc A-Series graphics (Alchemist or DG2) feature, previously available as a Technology
Preview, is now fully supported. Intel Arc A-Series graphics is a GPU that enables hardware acceleration,
mostly used in PC gaming.
Bugzilla:2101598
[1]
4.16. THE WEB CONSOLE
Podman health check action is now available
You can select one of the following Podman health check actions when creating a new container:
No action (default): Take no action.
Restart: Restart the container.
Stop: Stop the container.
Force stop: Force stops the container, it does not wait for the container to exit.
Jira:RHELDOCS-16247
[1]
Stratis is now available in the RHEL web console
With this update, the Red Hat Enterprise Linux web console provides the ability to manage Stratis
storage.
To learn more about Stratis, see Setting up Stratis file systems using the web console .
Jira:RHELPLAN-122345
[1]
4.17. RED HAT ENTERPRISE LINUX SYSTEM ROLES
New RHEL system role for managing systemd units
The rhel-system-role package now contains the systemd RHEL system role. You can use this role to
deploy unit files and manage systemd units on multiple systems. You can automate systemd
functionality by providing systemd unit files and templates, and by specifying the state of those units,
such as started, stopped, masked and other.
Bugzilla:2224384
New option in the ssh role to disable configuration backups
You can now prevent old configuration files from being backed up before they are overwritten by
setting the new ssh_backup option to false. Previously, backup configuration files were created
automatically, which might be unnecessary. The default value of the ssh_backup option is true, which
preserves the original behavior.
Bugzilla:2216753
keylime_server RHEL system role
With the new keylime_server RHEL system role, you can use Ansible Playbooks to configure the verifier
and registrar Keylime components on RHEL 9 systems. Keylime is a remote machine attestation tool
that uses the trusted platform module (TPM) technology.
CHAPTER 4. NEW FEATURES
69
Bugzilla:2224385
Support for new ha_cluster system role features
The ha_cluster system role now supports the following features:
Configuration of resource and resource operation defaults, including multiple sets of defaults
with rules.
Loading and blocking of SBD watchdog kernel modules. This makes installed hardware
watchdogs available to the cluster.
Assignment of distinct passwords to the cluster hosts and the quorum device. This allows you to
configure a deployment where the same quorum hosts are joined to multiple, separate clusters,
and the passwords of the hacluster user on these clusters are different.
For information about the parameters you configure to implement these features, see Configuring a
high-availability cluster by using the ha_cluster RHEL system role.
Bugzilla:2185065, Bugzilla:2185067, Bugzilla:2216481
storage system role supports configuring the stripe size for RAID LVM volumes
With this update, you can now specify a custom stripe size when creating RAID LVM devices. For better
performance, use the custom stripe size for SAP HANA. The recommended stripe size for RAID LVM
volumes is 64 KB.
Bugzilla:2181656
The network RHEL system role supports the auto-dns option to control automatic DNS
record updates
This enhancement provides support for defined name servers and search domains. You can now use
only the name servers and search domains specified in dns and dns_search properties while disabling
automatically configured name servers and search domains such as dns record from DHCP. With this
enhancement, you can disable automatically auto dns record by changing the auto-dns settings.
Bugzilla:2211194
The network RHEL system role supports the no-aaaa DNS option
You can now use the no-aaaa option to configure DNS settings on managed nodes. Previously, there
was no option to suppress AAAA queries generated by the stub resolver, including AAAA lookups
triggered by NSS-based interfaces such as getaddrinfo; only DNS lookups were affected. With this
enhancement, you can now suppress AAAA queries generated by the stub resolver.
Bugzilla:2218592
The ad_integration RHEL system role can now rejoin an AD domain
With this update, you can now use the ad_integration RHEL system role to rejoin an Active Directory
(AD) domain. To do this, set the ad_integration_force_rejoin variable to true. If the realm_list output
shows that host is already in an AD domain, it will leave the existing domain before rejoining it.
Bugzilla:2211723
The certificate RHEL system role now allows changing certificate file mode when using
certmonger
Red Hat Enterprise Linux 9.3 9.3 Release Notes
70
Previously, certificates created by the certificate RHEL system role with the certmonger provider used
a default file mode. However, in some use-cases you might require a more restrictive mode. With this
update, you can now set a different certificate and a key file mode using the mode parameter.
Bugzilla:2218204
The postgresql RHEL system role is now available
The new postgresql RHEL system role installs, configures, manages, and starts the PostgreSQL server.
The role also optimizes the database server settings to improve performance.
The role supports the currently released and supported versions of PostgreSQL on RHEL 8 and RHEL 9
managed nodes.
For more information, see Installing and configuring PostgreSQL by using the postgresql RHEL system
role.
Bugzilla:2151373
podman RHEL system role now supports Quadlets, health checks, and secrets
Starting with Podman 4.6, you can use the podman_quadlet_specs variable in the podman RHEL
system role. You can define a Quadlet by specifying a unit file, or in the inventory by a name, a type of
unit, and a specification. Types of a unit can be the following: container, kube, network, and volume.
Note that Quadlets work only with root containers on RHEL 8. Quadlets work with rootless containers on
RHEL 9.
The health checks are supported only for Quadlet Container types. In the [Container] section, specify
the HealthCmd field to define the health check command and HealthOnFailure field to define the
action when a container is unhealthy. Possible options are none, kill, restart, and stop.
You can use the podman_secrets variable to manage secrets. For details, see upstream
documentation.
Jira:RHELPLAN-154441
[1]
Improved performance of the selinux system role with restorecon -T 0
The selinux system role now uses the -T 0 option with the restorecon command in all applicable cases.
This improves the performance of tasks that restore default SELinux security contexts on files.
Bugzilla:2179460
The rhc system role now supports setting a proxy server type
The newly introduced attribute scheme under the rhc_proxy parameter enables you to configure the
proxy server type by using the rhc system role. You can set two values: http, the default and https.
Bugzilla:2211748
firewall RHEL system role supports variables related to ipsets
With this update of the firewall RHEL system role, you can define, modify, and delete ipsets. Also, you
can add and remove those ipsets from firewall zones. Alternatively, you can use those ipsets when
defining firewall rich rules.
You can manage ipsets with the firewall RHEL system role using the following variables:
CHAPTER 4. NEW FEATURES
71
ipset
ipset_type
ipset_entries
short
description
state: present or state: absent
permanent: true
The following are some notable benefits of this enhancement:
You can reduce the complexity of the rich rules that define rules for many IP addresses.
You can add or remove IP addresses from sets as needed without modifying multiple rules.
For more details, see resources in the /usr/share/doc/rhel-system-roles/firewall/ directory.
Bugzilla:2229802
RHEL system roles now have new volume options for mount point customization
With this update, you can now specify mount_user, mount_group, and mount_permissions
parameters for your mount directory.
Bugzilla:2181657
The firewall RHEL system role has an option to disable conflicting services, and it no longer
fails if firewalld is masked
Previously, the firewall system role failed when the firewalld service was masked on the role run or in
the presence of conflicting services. This update brings two notable enhancements:
The linux-system-roles.firewall role always attempts to install, unmask, and enable the firewalld
service on role run. You can now add a new variable firewall_disable_conflicting_services to your
playbook to disable known conflicting services, for example, iptables.service, nftables.service, and
ufw.service. The firewall_disable_conflicting_services variable is set to false by default. To disable
conflicting services, set the variable to true.
Bugzilla:2222761
Resetting the firewall RHEL system role configuration now requires minimal downtime
Previously, when you reset the firewall role configuration by using the previous: replaced variable, the
firewalld service restarted. Restarting adds downtime and prolongs the period of an open connection in
which firewalld does not block traffic from active connections. With this enhancement, the firewalld
service completes the configuration reset by reloading instead of restarting. Reloading minimizes the
downtime and reduces the opportunity to bypass firewall rules. As a result, using the previous: replaced
variable to reset the firewall role configuration now requires minimal downtime.
Bugzilla:2223764
4.18. VIRTUALIZATION
Red Hat Enterprise Linux 9.3 9.3 Release Notes
72
sevctl is now fully compatible with AMD EPYC Rome and Milan
With this update, the sevctl utility correctly recognizes the latest AMD EPYC cores, including the AMD
EPYC Rome and AMD EPYC Milan series. As a result, you can use sevctl to configure the features of
AMD Secure Encrypted Virtualization (SEV) that are available on these CPUs.
Note, however, that advanced SEV functions, such as SEV-ES and SEV-SNP are only provided as
Technology Previews in RHEL 9, and therefore unsupported.
Bugzilla:2104857
[1]
virtio-vga and virtio-gpu devices now support blob resources
It is now possible for virtio-vga and virtio-gpu devices to use blob memory resources, which improves
their performance in certain scenarios. To attach a blob resource to a virtio graphics device, add a
blob="on" option to the corresponding <video> section in the virtual machine’s XML configuration. For
example:
<video>
<model type="virtio" heads="1" primary="yes" blob="on"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x0"/>
</video>
Note, however, that this feature currently does not work on IBM Z hosts.
Bugzilla:2032406
Virtualization support for 4th Generation Intel Xeon Scalable processors
With this update, virtualization on RHEL 9 adds support for the 4th Generation Intel Xeon Scalable
processors, formerly known as Sapphire Rapids. As a result, virtual machines hosted on RHEL 9 can now
use the SapphireRapids CPU model and utilise new features that the processors provide.
Bugzilla:1880531
[1]
Improved memory reclaiming for Secure Execution on IBM Z
When using a virtual machine (VM) with IBM Secure Execution on IBM Z, you can now set up enhanced
memory reclaiming for the VM. If the VM is using 32 GiB or more RAM, this setting improves the
performance of rebooting or stopping the VM.
To set up enhanced memory reclaiming in a VM, add the <async-teardown enabled='yes'/> line to the
<features></features> section in its XML configuration.
Bugzilla:2168499
[1]
New virtualization features in the RHEL web console
With this update, the RHEL web console includes new features in the Virtual Machines page. You can
now:
Select the Create and edit button for a virtual machine (VM) based on a cloud image, which
allows you to edit all of the VM properties before the VM is installed.
Create a raw storage volume during virtual machine creation.
Set up a virtual socket (vsock) to enable communication between the host and the VM over a
socket.
CHAPTER 4. NEW FEATURES
73
Note that a virtual socket requires vsock-aware software, such as socat, to enable the
communication.
Jira:RHELDOCS-16487
[1]
4.19. RHEL IN CLOUD ENVIRONMENTS
cloud-init supports NetworkManager keyfiles
With this update, the cloud-init utility can use a NetworkManager (NM) keyfile to configure the network
of the created cloud instance.
Note that by default, cloud-init still uses the sysconfig method for network setup. To configure cloud-
init to use a NM keyfile instead, edit the /etc/cloud/cloud.cfg and set network-manager as the primary
network renderer:
# cat /etc/cloud/cloud.cfg
network:
renderers: ['network-manager', 'eni', 'netplan', 'sysconfig', 'networkd']
Bugzilla:2118235
[1]
cloud-init now uses VMware datasources by default on ESXi
When creating RHEL virtual machines (VMs) on a host that uses the VMware ESXi hypervisor, such as
the VMware vSphere cloud platform. This improves the performance and stability of creating an ESXi
instance of RHEL by using cloud-init. Note, however, that ESXi is still compatible with Open
Virtualization Format (OVF) datasources, and you can use an OVF datasource if a VMware one is not
available.
Bugzilla:2172341
[1]
4.20. SUPPORTABILITY
sos rebased to version 4.6
The sos utility, for collecting configuration, diagnostic, and troubleshooting data, has been rebased to
version 4.6. This update provides the following enhancements:
sos reports now include the contents of both /boot/grub2/custom.cfg and
/boot/grub2/user.cfg files that might contain critical information for troubleshooting boot
issues. (BZ#2213951)
The sos plugin for OVN-Kubernetes collects additional logs for the interconnect environment.
With this update, sos also collects logs from the ovnkube-controller container when both
ovnkube-node and ovnkube-controller containers are merged into one.
In addition, notable bug fixes include:
sos now correctly gathers cgroup data in the OpenShift Container Platform 4 environment
(BZ#2186361).
While collecting sos reports with the sudo plugin enabled, sos now removes the bindpw option
properly. (BZ#2143272)
Red Hat Enterprise Linux 9.3 9.3 Release Notes
74
The subscription_manager plugin no longer collects proxy usernames and passwords from the
/var/lib/rhsm/ path. (BZ#2177282)
The virsh plugin no longer collects the SPICE remote-display passwords in virt-manager logs,
which prevents sos from disclosing passwords in its reports. (BZ#2184062)
sos now masks usernames and passwords previously displayed in the
/var/lib/iscsi/nodes/<IQN>/<PortalIP>/default file.
IMPORTANT
The generated archive might contain data considered sensitive. Thus, you should
always review the content before passing it to any third party.
(BZ#2187859)
sos completes the tailed log collection even when the size of the log file is exceeded and when
a plugin times out. (BZ#2203141)
When entering the sos collect command on a Pacemaker cluster node, sos collects an sos
report from the same cluster node. (BZ#2186460)
When collecting data from a host in the OpenShift Container Platform 4 environment, sos now
uses the sysroot path, which ensures that only the correct data are assembled. (BZ#2075720)
The sos report --clean command obfuscates all MAC addresses as intended. (BZ#2207562)
Disabling the hpssm plugin no longer raises exceptions. (BZ#2216608)
The sos clean command follows permissions of sanitized files. (BZ#2218279)
For details on each release of sos, see upstream release notes.
Jira:RHELPLAN-156196
[1]
4.21. CONTAINERS
Podman supports pulling and pushing images compressed with zstd
You can pull and push images compressed with the zstd format. The zstd compression is more efficient
and faster than gzip. It can reduce the amount of network traffic and storage involved in pulling and
pushing the image.
Jira:RHELPLAN-154314
[1]
Quadlet in Podman is now available
Beginning with Podman v4.6, you can use Quadlet to automatically generate a systemd service file from
a container description. The Quadlets might be easier to use than the podman generate systemd
command because the description focuses on the relevant container details and without the technical
complexity of running containers under systemd.
For more details, see the Quadlet upstream documentation and the Make systemd better for Podman
with Quadlet article.
Jira:RHELPLAN-154432
[1]
CHAPTER 4. NEW FEATURES
75
The Container Tools packages have been updated
The updated Container Tools RPM meta-package, which contain the Podman, Buildah, Skopeo, crun,
and runc tools, are now available. This update applies a series of bug fixes and enhancements over the
previous version.
Notable changes in Podman v4.6 include:
The podman kube play command now supports the --configmap=<path> option to provide
Kubernetes YAML file with environment variables used within the containers of the pod.
The podman kube play command now supports multiple Kubernetes YAML files for the --
configmap option.
The podman kube play command now supports containerPort names and port numbers within
liveness probes.
The podman kube play command now adds the ctrName as an alias to the pod network.
The podman kube play and podman kube generate commands now support SELinux filetype
labels and ulimit annotations.
A new command, podman secret exists, has been added, which verifies if a secret with the
given name exists.
The podman create, podman run, podman pod create, and podman pod clone commands
now support a new option, --shm-size-systemd, which allows limiting tmpfs sizes for systemd-
specific mounts.
The podman create and podman run commands now support a new option, --security-opt
label=nested, which allows SELinux labeling within a confined container.
Podman now supports auto updates for containers running inside a pod.
Podman can now use an SQLite database as a backend for increased stability. The default
remains the BoltDB database. You can select the database by setting the database_backend
field in the containers.conf file.
Podman now supports Quadlets to automatically generate a systemd service file from the
container description. The description focuses on the relevant container details and hides the
technical complexity of running containers under systemd.
For further information about notable changes, see upstream release notes.
Jira:RHELPLAN-154438
[1]
Podman now supports a Podmansh login shell
Beginning with Podman v4.6, you can use the Podmansh login shell to manage user access and control.
Configure your settings to use the /usr/bin/podmansh command as a login shell instead of a standard
shell command, for example, /usr/bin/bash. When a user logs into a system setup, the podmansh
command runs the user’s session into a Podman container named podmansh. Containers into which
users log in are defined using the Quadlet files, which are created in the
/etc/containers/systemd/users/ directory. In these files, set the ContainerName field in the
[Container] section to podmansh. The systemd automatically starts podmansh when the user session
starts and continues running until all user sessions exit.
For more information, see Podman v4.6.0 Introduces Podmansh: A Revolutionary Login Shell .
Red Hat Enterprise Linux 9.3 9.3 Release Notes
76
Jira:RHELPLAN-163003
[1]
Clients for sigstore signatures with Fulcio and Rekor are now available
With Fulcio and Rekor servers, you can now create signatures by using short-term certificates based on
an OpenID Connect (OIDC) server authentication, instead of manually managing a private key. Clients
for sigstore signatures with Fulcio and Rekor, previously available as a Technology Preview, are now fully
supported. This added functionality is the client side support only, and does not include either the Fulcio
or Rekor servers.
Add the fulcio section in the policy.json file. To sign container images, use the podman push --sign-
by-sigstore=file.yml or skopeo copy --sign-by-sigstore=file.yml commands, where file.yml is the
sigstore signing parameter file.
To verify signatures, add the fulcio section and the rekorPublicKeyPath or rekorPublicKeyData fields
in the policy.json file. For more information, see containers-policy.json man page.
Jira:RHELPLAN-160660
[1]
The pasta networking mode is now available
Starting with Podman v4.4.1, you can use the pasta network mode. It is a high-performance
replacement of the default network mode slirp4netns and supports IPv6 forwarding. To select the
pasta network mode, install the passt package to use the podman run command with the --
network=pasta option. With Podman v4.6, you can set default rootless network mode in the
/etc/containers/containers.conf configuration file by using the default_rootless_network_cmd field
under the [network] section.
Jira:RHELDOCS-16240
[1]
UBI 9 Micro Container Image no longer contains zoneinfo installed by tzdata
With this update, the time zone information provided by the tzdata package is no longer included in UBI
9 Micro container images, consequently reducing the image size. The UBI 9 Minimal and UBI 9 Micro
containers are UTC-only, and users should reinstall the tzdata package to get the full zoneinfo, if
needed.
Bugzilla:2223028
CHAPTER 4. NEW FEATURES
77
CHAPTER 5. IMPORTANT CHANGES TO EXTERNAL KERNEL
PARAMETERS
This chapter provides system administrators with a summary of significant changes in the kernel
distributed with Red Hat Enterprise Linux 9.3. These changes could include, for example, added or
updated proc entries, sysctl, and sysfs default values, boot parameters, kernel configuration options,
or any noticeable behavior changes.
New kernel parameters
amd_pstate=[X86]
With this kernel parameter, you can scale the performance of the AMD CPU. Available values include:
disable - Do not enable amd_pstate as the default scaling driver for the supported
processors.
passive - Use amd_pstate with passive mode as a scaling driver. In this mode autonomous
selection is disabled. Driver requests a required performance level and platform tries to
match the same performance level if it is satisfied by guaranteed performance level.
active - Use amd_pstate_epp driver instance as the scaling driver, driver provides a hint to
the hardware if software wants to bias toward performance (0x0) or energy efficiency (0xff)
to the CPPC firmware. Then CPPC power algorithm will calculate the runtime workload and
adjust the realtime cores frequency.
guided - Activate guided autonomous mode. Driver requests minimum and maximum
performance level and the platform autonomously selects a performance level in this range
and appropriate to the current workload.
arm64.nosve=[ARM64]
With this kernel parameter, you can unconditionally disable Scalable Vector Extension support.
arm64.nosme=[ARM64]
With this kernel parameter, you can unconditionally disable Scalable Matrix Extension support.
gather_data_sampling=[X86,INTEL]
With this kernel parameter, you can control the Gather Data Sampling (GDS) mitigation.
GDS is a hardware vulnerability that allows unprivileged speculative access to data that was
previously stored in vector registers.
This issue is mitigated by default in updated microcode. The mitigation might have a performance
impact but can be disabled. On systems without the microcode mitigation disabling AVX serves as a
mitigation. Available values include:
force - Disable AVX to mitigate systems without microcode mitigation. No effect if the
microcode mitigation is present. Known to cause crashes in userspace with buggy AVX
enumeration.
off - Disable GDS mitigation.
nospectre_bhb=[ARM64]
With this kernel parameter, you can disable all mitigations for Spectre-BHB (branch history injection)
vulnerability. System might allow data leaks with this option.
trace_clock=[FTRACE]
With this kernel parameter, you can set the clock used for tracing events at boot up. Available values
Red Hat Enterprise Linux 9.3 9.3 Release Notes
78
With this kernel parameter, you can set the clock used for tracing events at boot up. Available values
include:
local - Use the per CPU timestamp counter.
global - Event timestamps are synchronize across CPUs. Might be slower than the local
clock, but better for some race conditions.
counter - Simple counting of events (1, 2, ..) note, some counts might be skipped due to the
infrastructure grabbing the clock more than once per event.
uptime - Use jiffies as the timestamp.
perf - Use the same clock that perf uses.
mono - Use the ktime_get_mono_fast_ns() function for timestamps.
mono_raw - Use the ktime_get_raw_fast_ns() function for timestamps.
boot - Use the ktime_get_boot_fast_ns() function for timestamps.
Architectures might add more clocks, see Documentation/trace/ftrace.rst for more details.
Updated kernel parameters
cgroup.memory=[KNL]
With this kernel parameter, you can pass options to the cgroup memory controller.
This parameter takes the format of: <string>
Available values include:
nosocket - Disable socket memory accounting.
nokmem - Disable kernel memory accounting.
[NEW] nobpf - Disable BPF memory accounting.
hugetlb_free_vmemmap=[KNL]
This kernel parameter enables the feature of freeing unused vmemmap pages associated with each
hugetlb page on boot. For this parameter to work, the
CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP configuration option must be enabled.
This parameter takes the format of: { on | off (default) }
Available values include:
on - enables this feature
off - disables this feature
NOTE
The vmemmap pages might be allocated from the added memory block itself
when the memory_hotplug.memmap_on_memory module parameter is
enabled. Those vmemmap pages cannot be optimized even if this feature is
enabled. Other vmemmap pages not allocated from the added memory block
itself are not affected.
CHAPTER 5. IMPORTANT CHANGES TO EXTERNAL KERNEL PARAMETERS
79
intel_pstate=[X86]
You can use this kernel parameter for CPU performance scaling. Available values include:
disable - Do not enable intel_pstate as the default scaling driver for the supported
processors.
[NEW] active - Use intel_pstate driver to bypass the scaling governors layer of cpufreq and
provides it own algorithms for p-state selection. There are two P-state selection algorithms
provided by intel_pstate in the active mode: powersave and performance. The way they
both operate depends on whether or not the hardware managed P-states (HWP) feature has
been enabled in the processor and possibly on the processor model.
passive - Use intel_pstate as a scaling driver, but configure it to work with generic cpufreq
governors (instead of enabling its internal governor). This mode cannot be used along with
the hardware-managed P-states (HWP) feature.
force - Enable intel_pstate on systems that prohibit it by default in favor of acpi-cpufreq.
Forcing the intel_pstate driver instead of acpi-cpufreq might disable platform features,
such as thermal controls and power capping, that rely on ACPI P-States information being
indicated to OSPM and therefore should be used with caution. This option does not work
with processors that are not supported by the intel_pstate driver or on platforms that use
pcc-cpufreq instead of acpi-cpufreq.
no_hwp - Do not enable hardware P state control (HWP) if available.
hwp_only - Only load intel_pstate on systems that support hardware P state control (HWP)
if available.
support_acpi_ppc - Enforce ACPI _PPC performance limits. If the Fixed ACPI Description
Table specifies preferred power management profile as "Enterprise Server" or "Performance
Server", then this feature is turned on by default.
per_cpu_perf_limits - Allow per-logical-CPU P-State performance control limits using the
cpufreq sysfs interface.
kvm-arm.mode=[KVM,ARM]
With this kernel parameter, you can select one of KVM/arm64’s modes of operation. Available values
include:
none - Forcefully disable KVM.
nvhe - Standard nVHE-based mode, without support for protected guests.
protected - nVHE-based mode with support for guests whose state is kept private from the
host. Setting mode to protected disables kexec and hibernation for the host.
[NEW] nested - VHE-based mode with support for nested virtualization. Requires at least
ARMv8.3 hardware. The nested option is experimental and should be used with extreme
caution.
Defaults to VHE/nVHE based on hardware support.
libata.force=[LIBATA]
With this kernel parameter, you can force configurations.
The format is a comma-separated list of "[ID:]VAL" where ID is PORT[.DEVICE]. PORT and DEVICE
Red Hat Enterprise Linux 9.3 9.3 Release Notes
80
The format is a comma-separated list of "[ID:]VAL" where ID is PORT[.DEVICE]. PORT and DEVICE
are decimal numbers matching port, link or device. Basically, it matches the ATA ID string printed on
console by libata.
If the whole ID part is omitted, the last PORT and DEVICE values are used.
If ID has not been specified yet, the configuration applies to all ports, links and devices.
If only the DEVICE value is omitted, the parameter applies to the port and all links and
devices behind it. DEVICE number of 0 either selects the first device or the first fan-out link
behind PMP device. It does not select the host link. DEVICE number of 15 selects the host link
and device attached to it.
The VAL specifies the configuration to force. As long as there is no ambiguity, shortcut
notation is allowed. For example, both 1.5 and 1.5G would work for 1.5Gbps.
With the libata.force= parameter, you can force the following configurations:
Cable type: 40c, 80c, short40c, unk, ign or sata. Any ID with matching PORT is used.
SATA link speed limit: 1.5Gbps or 3.0Gbps.
Transfer mode: pio[0-7], mwdma[0-4] and udma[0-7]. udma[/][16,25,33,44,66,100,133]
notation is also allowed.
nohrst, nosrst, norst: suppress hard, soft and both resets.
rstonce: only attempt one reset during hot-unplug link recovery.
[NEW] [no]dbdelay: Enable or disable the extra 200ms delay before debouncing a link PHY
and device presence detection.
[no]ncq: Turn on or off NCQ.
[no]ncqtrim: Enable or disable queued DSM TRIM.
[NEW] [no]ncqati: Enable or disable NCQ trim on ATI chipset.
[NEW] [no]trim: Enable or disable (unqueued) TRIM.
[NEW] trim_zero: Indicate that TRIM command zeroes data.
[NEW] max_trim_128m: Set 128M maximum trim size limit.
[NEW] [no]dma: Turn on or off DMA transfers.
atapi_dmadir: Enable ATAPI DMADIR bridge support.
atapi_mod16_dma: Enable the use of ATAPI DMA for commands that are not a multiple of
16 bytes.
[no]dmalog: Enable or disable the use of the READ LOG DMA EXT command to access logs.
[no]iddevlog: Enable or disable access to the identify device data log.
[no]logdir: Enable or disable access to the general purpose log directory.
[NEW] max_sec_128: Set transfer size limit to 128 sectors.
CHAPTER 5. IMPORTANT CHANGES TO EXTERNAL KERNEL PARAMETERS
81
[NEW] max_sec_1024: Set or clear transfer size limit to 1024 sectors.
[NEW] max_sec_lba48: Set or clear transfer size limit to 65535 sectors.
[NEW] [no]lpm: Enable or disable link power management.
[NEW] [no]setxfer: Indicate if transfer speed mode setting should be skipped.
[NEW] [no]fua: Disable or enable FUA (Force Unit Access) support for devices supporting
this feature.
dump_id: Dump IDENTIFY data.
disable: Disable this device.
NOTE
If there are multiple matching configurations changing the same attribute, the
last one is used.
mitigations=[X86,PPC,S390,ARM64]
With this kernel parameter, you can control optional mitigations for CPU vulnerabilities. This is a set
of curated, arch-independent options, each of which is an aggregation of existing arch-specific
options. Available values include:
off - disable all optional CPU mitigations. This improves system performance, but it can also
expose users to several CPU vulnerabilities. The off value is equivalent to:
if nokaslr then kpti=0 [ARM64]
gather_data_sampling=off [X86]
kvm.nx_huge_pages=off [X86]
l1tf=off [X86]
mds=off [X86]
mmio_stale_data=off [X86]
no_entry_flush [PPC]
no_uaccess_flush [PPC]
nobp=0 [S390]
nopti [X86,PPC]
nospectre_bhb [ARM64]
nospectre_v1 [X86,PPC]
nospectre_v2 [X86,PPC,S390,ARM64]
retbleed=off [X86]
Red Hat Enterprise Linux 9.3 9.3 Release Notes
82
spec_store_bypass_disable=off [X86,PPC]
spectre_v2_user=off [X86]
srbds=off [X86,INTEL]
ssbd=force-off [ARM64]
tsx_async_abort=off [X86]
Exceptions: This does not have any effect on kvm.nx_huge_pages when
kvm.nx_huge_pages=force.
auto (default) - Mitigate all CPU vulnerabilities, but leave SMT enabled, even if it is
vulnerable. This is for users who do not want to be surprised by SMT getting disabled across
kernel upgrades, or who have other ways of avoiding SMT-based attacks.
auto,nosmt - Mitigate all CPU vulnerabilities, disabling SMT if needed. This is for users who
always want to be fully mitigated, even if it means losing SMT. The auto,nosmt options are
equivalent to:
l1tf=flush,nosmt [X86]
mds=full,nosmt [X86]
tsx_async_abort=full,nosmt [X86]
mmio_stale_data=full,nosmt [X86]
retbleed=auto,nosmt [X86]
nomodeset
With this kernel parameter, you can disable kernel modesetting. Most systems' firmware sets up a
display mode and provides framebuffer memory for output. With nomodeset, DRM and fbdev
drivers will not load if they could possibly displace the preinitialized output. Only the system
framebuffer will be available for use. The drivers will not perform display-mode changes or
accelerated rendering.
This parameter is especially useful as error fallback, or for testing and debugging.
rdt=[HW,X86,RDT]
With this kernel parameter, you can turn on or off individual RDT features. The list includes: cmt,
mbmtotal, mbmlocal, l3cat, l3cdp, l2cat, l2cdp, mba, smba, bmec.
For example, to turn on cmt and turn off mba use:
rdt=cmt,!mba
rodata=[KNL]
With this kernel parameter, you can disable read-only kernel mappings. Available options include:
on - Mark read-only kernel memory as read-only (default).
off - Leave read-only kernel memory writable for debugging.
[NEW] full - Mark read-only kernel memory and aliases as read-only [arm64].
CHAPTER 5. IMPORTANT CHANGES TO EXTERNAL KERNEL PARAMETERS
83
Removed kernel parameters
nobats=[PPC]
With this kernel parameter, you can forbid the use of BATs for mapping kernel lowmem on "Classic"
PPC cores.
noltlbs=[PPC]
With this kernel parameter, you can forbid the use of huge page and tlb entries for kernel lowmem
mapping on PPC40x and PPC8xx.
swapaccount=[0|1]=[KNL]
With this kernel parameter, you can enable or disable accounting of swap in memory resource
controller. For more information, see Documentation/admin-guide/cgroup-v1/memory.rst.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
84
CHAPTER 6. DEVICE DRIVERS
6.1. NEW DRIVERS
Network drivers
MediaTek MT7601U (USB) support (mt7601u), adds support for MT7601U-based wireless USB
dongles (only in 64-bit ARM architecture)
MediaTek MT76x0E (PCIe) support (mt76x0e), adds support for MT7610/MT7630-based
wireless PCIe devices (only in 64-bit ARM architecture)
MediaTek MT76x0U (USB) support (mt76x0u), adds support for MT7610U-based wireless USB
2.0 dongles (only in 64-bit ARM architecture)
MediaTek MT76x2E (PCIe) support (mt76x2e), adds support for MT7612/MT7602/MT7662-
based wireless PCIe devices (only in 64-bit ARM architecture)
MediaTek MT76x2U (USB) support (mt76x2u), adds support for MT7612U-based wireless USB
3.0 dongles (only in 64-bit ARM architecture)
MediaTek MT7921E (PCIe) support (mt7921e), adds support for MT7921E 802.11ax 2x2:2SS
wireless devices (only in 64-bit ARM architecture)
Atheros driver 802.11n HTC based wireless devices (ath9k_htc) (only in 64-bit ARM
architecture)
Broadcom 802.11n wireless LAN driver (brcmsmac) (only in 64-bit ARM architecture)
Broadcom 802.11n wireless LAN driver utilities (brcmutil) (only in 64-bit ARM architecture)
Broadcom 802.11 wireless LAN fullmac driver (brcmfmac) (only in 64-bit ARM architecture)
Core module for Qualcomm Atheros 802.11ac wireless LAN cards (ath10k_core) (only in 64-bit
ARM architecture)
Core module for Qualcomm Atheros 802.11ax wireless LAN cards (ath11k) (only in 64-bit ARM
architecture)
Device simulator for WWAN framework (wwan_hwsim)
Driver support for Qualcomm Atheros 802.11ac WLAN PCIe/AHB devices (ath10k_pci) (only in
64-bit ARM architecture)
Driver support for Qualcomm Technologies 802.11ax WLAN PCIe devices (ath11k_pci) (only in
64-bit ARM architecture)
Intel® Wireless Wi-Fi driver for Linux (iwlwifi) (only in 64-bit ARM architecture)
Intel® Wireless Wi-Fi Link AGN driver for Linux (iwldvm)- (only in 64-bit ARM architecture)
IOSM Driver (iosm)
Marvell WiFi-Ex Driver version 1.0 (mwifiex) (only in 64-bit ARM architecture)
Marvell WiFi-Ex PCI-Express Driver version 1.0 (mwifiex_pcie) (only in 64-bit ARM
CHAPTER 6. DEVICE DRIVERS
85
Marvell WiFi-Ex PCI-Express Driver version 1.0 (mwifiex_pcie) (only in 64-bit ARM
architecture)
Marvell WiFi-Ex SDIO Driver version 1.0 (mwifiex_sdio) (only in 64-bit ARM architecture)
Marvell WiFi-Ex USB Driver version 1.0 (mwifiex_usb) (only in 64-bit ARM architecture)
MediaTek PCIe 5G WWAN modem T7xx driver (mtk_t7xx)
Network/MBIM over MHI (mhi_wwan_mbim) (only in 64-bit ARM architecture, IBM Power
Systems, Little Endian, and AMD and Intel 64-bit architectures)
PCI basic driver for rtlwifi (rtl_pci) (only in 64-bit ARM architecture)
Ralink RT2800 library version 2.3.0 (rt2800lib) (only in 64-bit ARM architecture)
Ralink RT2800 PCI & PCMCIA Wireless LAN driver version 2.3.0 (rt2800pci) (only in 64-bit
ARM architecture)
Ralink RT2800 USB Wireless LAN driver version 2.3.0 (rt2800usb) (only in 64-bit ARM
architecture)
Realtek 802.11ac wireless 8821c driver (rtw88_8821c) (only in 64-bit ARM architecture)
Realtek 802.11ac wireless 8821ce driver (rtw88_8821ce) (only in 64-bit ARM architecture)
Realtek 802.11ac wireless 8822b driver (rtw88_8822b) (only in 64-bit ARM architecture)
Realtek 802.11ac wireless 8822be driver (rtw88_8822be) (only in 64-bit ARM architecture)
Realtek 802.11ac wireless 8822c driver (rtw88_8822c) - (only in 64-bit ARM architecture)
Realtek 802.11ac wireless 8822ce driver (rtw88_8822ce) (only in 64-bit ARM architecture)
Realtek 802.11ac wireless core module (rtw88_core) (only in 64-bit ARM architecture)
Realtek 802.11ac wireless PCI driver (rtw88_pci) (only in 64-bit ARM architecture)
Realtek 802.11ax wireless 8852A driver (rtw89_8852a) (only in 64-bit ARM architecture)
Realtek 802.11ax wireless 8852AE driver (rtw89_8852ae) (only in 64-bit ARM architecture)
Realtek 802.11ax wireless 8852B driver (rtw89_8852b) (only in 64-bit ARM architecture and
AMD and Intel 64-bit architectures)
Realtek 802.11ax wireless 8852BE driver (rtw89_8852be) (only in 64-bit ARM architecture and
AMD and Intel 64-bit architectures)
Realtek 802.11ax wireless core module (rtw89_core) (only in 64-bit ARM architecture)
Realtek 802.11ax wireless PCI driver (rtw89_pci) (only in 64-bit ARM architecture)
Realtek 802.11n PCI wireless core (btcoexist) (only in 64-bit ARM architecture)
Realtek 802.11n PCI wireless core (rtlwifi) (only in 64-bit ARM architecture)
Realtek 802.11n wireless 8723d driver (rtw88_8723d) (only in 64-bit ARM architecture)
Red Hat Enterprise Linux 9.3 9.3 Release Notes
86
Realtek 802.11n wireless 8723de driver (rtw88_8723de) (only in 64-bit ARM architecture)
Realtek 8188E 802.11n PCI wireless (rtl8188ee) (only in 64-bit ARM architecture)
Realtek 8192C/8188C 802.11n PCI wireless (rtl8192c-common) (only in 64-bit ARM
architecture)
Realtek 8192C/8188C 802.11n PCI wireless (rtl8192ce) (only in 64-bit ARM architecture)
Realtek 8192C/8188C 802.11n USB wireless (rtl8192cu) (only in 64-bit ARM architecture)
Realtek 8192DE 802.11n Dual Mac PCI wireless (rtl8192de) (only in 64-bit ARM architecture)
Realtek 8192EE 802.11n PCI wireless (rtl8192ee) (only in 64-bit ARM architecture)
Realtek 8192S/8191S 802.11n PCI wireless (rtl8192se) (only in 64-bit ARM architecture)
Realtek 8723BE 802.11n PCI wireless (rtl8723be) (only in 64-bit ARM architecture)
Realtek 8723E 802.11n PCI wireless (rtl8723ae) (only in 64-bit ARM architecture)
Realtek 8821ae 802.11ac PCI wireless (rtl8821ae) (only in 64-bit ARM architecture)
Realtek RTL8723AE/RTL8723BE 802.11n PCI wireless common routines (rtl8723-common)
(only in 64-bit ARM architecture)
rt2800 MMIO library version 2.3.0 (rt2800mmio) (only in 64-bit ARM architecture)
rt2x00 library version 2.3.0 (rt2x00lib) (only in 64-bit ARM architecture)
rt2x00 mmio library version 2.3.0 ( rt2x00mmio) (only in 64-bit ARM architecture)
rt2x00 pci library version 2.3.0 ( rt2x00pci) (only in 64-bit ARM architecture)
rt2x00 usb library version 2.3.0 (rt2x00usb) (only in 64-bit ARM architecture)
RTL8XXXu USB mac80211 Wireless LAN Driver (rtl8xxxu) (only in 64-bit ARM architecture)
Shared library for Atheros wireless 802.11n LAN cards (ath9k_common) (only in 64-bit ARM
architecture)
Shared library for Atheros wireless LAN cards (ath) (only in 64-bit ARM architecture)
Support for Atheros 802.11n wireless LAN cards (ath9k_hw) (only in 64-bit ARM architecture)
Support for Atheros 802.11n wireless LAN cards (ath9k) (only in 64-bit ARM architecture)
The new Intel® wireless AGN driver for Linux (iwlmvm) (only in 64-bit ARM architecture)
Thunderbolt/USB4 network driver (thunderbolt_net)
USB basic driver for rtlwifi (rtl_usb) (only in 64-bit ARM architecture)
Graphics drivers and miscellaneous drivers
Atheros AR30xx firmware driver 1.0 (ath3k) (only in 64-bit ARM architecture)
BlueFRITZ! USB driver version 1.2 (bfusb) (only in 64-bit ARM architecture)
CHAPTER 6. DEVICE DRIVERS
87
Bluetooth HCI UART driver version 2.3 (hci_uart) (only in 64-bit ARM architecture)
Bluetooth support for Broadcom devices version 0.1 (btbcm) (only in 64-bit ARM architecture)
Bluetooth support for Intel devices version 0.1 (btintel) (only in 64-bit ARM architecture)
Bluetooth support for MediaTek devices version 0.1 (btmtk) (only in 64-bit ARM architecture)
Bluetooth support for Realtek devices version 0.1 (btrtl) (only in 64-bit ARM architecture)
Bluetooth virtual HCI driver version 1.5 (hci_vhci) (only in 64-bit ARM architecture)
Broadcom Blutonium firmware driver version 1.2 (bcm203x) (only in 64-bit ARM architecture)
Digianswer Bluetooth USB driver version 0.11 ( bpa10x) (only in 64-bit ARM architecture)
Generic Bluetooth SDIO driver version 0.1 (btsdio) (only in 64-bit ARM architecture)
Generic Bluetooth USB driver version 0.8 (btusb) (only in 64-bit ARM architecture)
Marvell Bluetooth driver version 1.0 (btmrvl) (only in 64-bit ARM architecture)
Marvell BT-over-SDIO driver version 1.0 (btmrvl_sdio) (only in 64-bit ARM architecture)
Linux device driver of the BMC IPMI SSIF interface (ssif_bmc) (only in 64-bit ARM
architecture)
vTPM Driver version 0.1 (tpm_vtpm_proxy)
AMD P-state driver Test module (amd-pstate-ut) (only in AMD and Intel 64-bit architectures)
Compute Express Link (CXL) ACPI driver (cxl_acpi) (only in 64-bit ARM architecture and AMD
and Intel 64-bit architectures)
Compute Express Link (CXL) core driver (cxl_core)
Compute Express Link (CXL) port driver (cxl_port)
NVIDIA Tegra GPC DMA Controller driver (tegra186-gpc-dma) (only in 64-bit ARM
architecture)
DRM Buddy Allocator (drm_buddy) (only in 64-bit IBM Z architecture)
DRM display adapter helper (drm_display_helper) (only in 64-bit IBM Z architecture)
HID driver for EVision devices (hid-evision) (only in 64-bit ARM architecture, IBM Power
Systems, Little Endian, and AMD and Intel 64-bit architectures)
Texas Instruments INA3221 HWMon Driver (ina3221) (only in 64-bit ARM architecture)
I3C core (i3c) (only in 64-bit ARM architecture)
Silvaco dual-role I3C master driver (svc-i3c-master) (only in 64-bit ARM architecture)
Microsoft Azure Network Adapter IB driver (mana_ib) (only in AMD and Intel 64-bit
architectures)
Soft RDMA transport (rdma_rxe)
Red Hat Enterprise Linux 9.3 9.3 Release Notes
88
i.MX8MP interconnect driver - Generic interconnect drivers for i.MX SOCs (imx8mp-
interconnect) (only in 64-bit ARM architecture)
Linux USB Video Class (uvc) (only in 64-bit ARM architecture, IBM Power Systems, Little
Endian, and AMD and Intel 64-bit architectures)
Common memory handling routines for videobuf2 (videobuf2-memops) (only in 64-bit ARM
architecture)
Device node registration for cec drivers (cec) (only in 64-bit IBM Z architecture)
Device node registration for media drivers (mc) (only in 64-bit ARM architecture)
Driver helper framework for Video for Linux 2 (videobuf2-v4l2) (only in 64-bit ARM
architecture)
Media buffer core framework (videobuf2-common) (only in 64-bit ARM architecture)
USB Video Class driver version 1.1.1 (uvcvideo) (only in 64-bit ARM architecture)
V4L2 DV Timings Helper Functions (v4l2-dv-timings) (only in 64-bit ARM architecture)
Video4Linux2 core driver (videodev) (only in 64-bit ARM architecture)
vmalloc memory handling routines for videobuf2 (videobuf2-vmalloc) (only in 64-bit ARM
architecture)
Framework for SPI NOR (spi-nor) (only in 64-bit ARM architecture)
Marvell CN10K DRAM Subsystem(DSS) PMU (marvell_cn10k_ddr_pmu) (only in 64-bit ARM
architecture)
Marvell CN10K LLC-TAD Perf driver (marvell_cn10k_tad_pmu) (only in 64-bit ARM
architecture)
Intel Meteor Lake PCH pinctrl/GPIO driver (pinctrl-meteorlake) (only in AMD and Intel 64-bit
architectures)
Intel In Field Scan (IFS) device (intel_ifs) (only in AMD and Intel 64-bit architectures)
NVIDIA WMI EC Backlight driver (nvidia-wmi-ec-backlight) (only in AMD and Intel 64-bit
architectures)
QMI encoder/decoder helper (qmi_helpers) (only in 64-bit ARM architecture)
AMD SoundWire driver (soundwire-amd) (only in AMD and Intel 64-bit architectures)
NVIDIA Tegra114 SPI Controller Driver (spi-tegra114) (only in 64-bit ARM architecture)
STMicroelectronics STUSB160x Type-C controller driver (stusb160x) (only in 64-bit ARM
architecture)
MLX5 VFIO PCI - User Level meta-driver for MLX5 device family (mlx5-vfio-pci)
6.2. UPDATED DRIVERS
Network driver updates
CHAPTER 6. DEVICE DRIVERS
89
Realtek RTL8152/RTL8153 Based USB Ethernet Adapters (r8152) has been updated to version
v1.12.13 (only in 64-bit ARM architecture, IBM Power Systems, Little Endian, and AMD and Intel
64-bit architectures).
Storage driver updates
Broadcom MegaRAID SAS Driver (megaraid_sas) has been updated to version 07.725.01.00-
rc1 (only in 64-bit ARM architecture, IBM Power Systems, Little Endian, and AMD and Intel 64-
bit architectures).
Driver for Microchip Smart Family Controller (smartpqi) has been updated to version 2.1.22-
040 (only in 64-bit ARM architecture, IBM Power Systems, Little Endian, and AMD and Intel 64-
bit architectures).
Emulex LightPulse Fibre Channel SCSI driver (lpfc) has been updated to version 0:14.2.0.12
(only in 64-bit ARM architecture, IBM Power Systems, Little Endian, and AMD and Intel 64-bit
architectures).
MPI3 Storage Controller Device Driver (mpi3mr) has been updated to version 8.4.1.0.0.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
90
CHAPTER 7. AVAILABLE BPF FEATURES
This chapter provides the complete list of Berkeley Packet Filter (BPF) features available in the kernel
of this minor version of Red Hat Enterprise Linux 9. The tables include the lists of:
System configuration and other options
Available program types and supported helpers
Available map types
This chapter contains automatically generated output of the bpftool feature command.
Table 7.1. System configuration and other options
Option Value
unprivileged_bpf_disabled 2 (bpf() syscall restricted to privileged users, admin can change)
JIT compiler 1 (enabled)
JIT compiler hardening 1 (enabled for unprivileged users)
JIT compiler kallsyms exports 1 (enabled for root)
Memory limit for JIT for unprivileged
users
528482304
CONFIG_BPF y
CONFIG_BPF_SYSCALL y
CONFIG_HAVE_EBPF_JIT y
CONFIG_BPF_JIT y
CONFIG_BPF_JIT_ALWAYS_ON y
CONFIG_DEBUG_INFO_BTF y
CONFIG_DEBUG_INFO_BTF_MODULES y
CONFIG_CGROUPS y
CONFIG_CGROUP_BPF y
CONFIG_CGROUP_NET_CLASSID y
CONFIG_SOCK_CGROUP_DATA y
CHAPTER 7. AVAILABLE BPF FEATURES
91
CONFIG_BPF_EVENTS y
CONFIG_KPROBE_EVENTS y
CONFIG_UPROBE_EVENTS y
CONFIG_TRACING y
CONFIG_FTRACE_SYSCALLS y
CONFIG_FUNCTION_ERROR_INJECTIO
N
y
CONFIG_BPF_KPROBE_OVERRIDE n
CONFIG_NET y
CONFIG_XDP_SOCKETS y
CONFIG_LWTUNNEL_BPF y
CONFIG_NET_ACT_BPF m
CONFIG_NET_CLS_BPF m
CONFIG_NET_CLS_ACT y
CONFIG_NET_SCH_INGRESS m
CONFIG_XFRM y
CONFIG_IP_ROUTE_CLASSID y
CONFIG_IPV6_SEG6_BPF y
CONFIG_BPF_LIRC_MODE2 n
CONFIG_BPF_STREAM_PARSER y
CONFIG_NETFILTER_XT_MATCH_BPF m
CONFIG_BPFILTER n
CONFIG_BPFILTER_UMH n
Option Value
Red Hat Enterprise Linux 9.3 9.3 Release Notes
92
CONFIG_TEST_BPF m
CONFIG_HZ 1000
bpf() syscall available
Large program size limit available
Bounded loop support available
ISA extension v2 available
ISA extension v3 available
Option Value
Table 7.2. Available program types and supported helpers
Program type Available helpers
socket_filter bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_perf_event_output, bpf_skb_load_bytes, bpf_get_current_task,
bpf_get_numa_node_id, bpf_get_socket_cookie, bpf_get_socket_uid,
bpf_skb_load_bytes_relative, bpf_map_push_elem, bpf_map_pop_elem,
bpf_map_peek_elem, bpf_spin_lock, bpf_spin_unlock, bpf_strtol, bpf_strtoul,
bpf_probe_read_user, bpf_probe_read_kernel, bpf_probe_read_user_str,
bpf_probe_read_kernel_str, bpf_jiffies64, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock, bpf_skc_to_tcp_timewait_sock,
bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock, bpf_snprintf_btf,
bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
CHAPTER 7. AVAILABLE BPF FEATURES
93
kprobe bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem, bpf_probe_read,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_perf_event_read, bpf_perf_event_output, bpf_get_stackid, bpf_get_current_task,
bpf_current_task_under_cgroup, bpf_get_numa_node_id, bpf_probe_read_str,
bpf_perf_event_read_value, bpf_get_stack, bpf_get_current_cgroup_id,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_send_signal, bpf_probe_read_user,
bpf_probe_read_kernel, bpf_probe_read_user_str, bpf_probe_read_kernel_str,
bpf_send_signal_thread, bpf_jiffies64, bpf_get_ns_current_pid_tgid,
bpf_get_current_ancestor_cgroup_id, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_get_task_stack, bpf_copy_from_user, bpf_snprintf_btf, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_task_storage_get, bpf_task_storage_delete,
bpf_get_current_task_btf, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_get_func_ip,
bpf_get_attach_cookie, bpf_task_pt_regs, bpf_get_branch_snapshot, bpf_find_vma,
bpf_loop, bpf_strncmp, bpf_copy_from_user_task, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr,
bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr, bpf_dynptr_read,
bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain,
bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
Red Hat Enterprise Linux 9.3 9.3 Release Notes
94
sched_cls bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id,
bpf_skb_store_bytes, bpf_l3_csum_replace, bpf_l4_csum_replace, bpf_tail_call,
bpf_clone_redirect, bpf_get_cgroup_classid, bpf_skb_vlan_push, bpf_skb_vlan_pop,
bpf_skb_get_tunnel_key, bpf_skb_set_tunnel_key, bpf_redirect, bpf_get_route_realm,
bpf_perf_event_output, bpf_skb_load_bytes, bpf_csum_diff, bpf_skb_get_tunnel_opt,
bpf_skb_set_tunnel_opt, bpf_skb_change_proto, bpf_skb_change_type,
bpf_skb_under_cgroup, bpf_get_hash_recalc, bpf_get_current_task,
bpf_skb_change_tail, bpf_skb_pull_data, bpf_csum_update, bpf_set_hash_invalid,
bpf_get_numa_node_id, bpf_skb_change_head, bpf_get_socket_cookie,
bpf_get_socket_uid, bpf_set_hash, bpf_skb_adjust_room, bpf_skb_get_xfrm_state,
bpf_skb_load_bytes_relative, bpf_fib_lookup, bpf_skb_cgroup_id,
bpf_skb_ancestor_cgroup_id, bpf_sk_lookup_tcp, bpf_sk_lookup_udp, bpf_sk_release,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_sk_fullsock, bpf_tcp_sock, bpf_skb_ecn_set_ce,
bpf_get_listener_sock, bpf_skc_lookup_tcp, bpf_tcp_check_syncookie, bpf_strtol,
bpf_strtoul, bpf_sk_storage_get, bpf_sk_storage_delete, bpf_tcp_gen_syncookie,
bpf_probe_read_user, bpf_probe_read_kernel, bpf_probe_read_user_str,
bpf_probe_read_kernel_str, bpf_jiffies64, bpf_sk_assign, bpf_ktime_get_boot_ns,
bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard,
bpf_ringbuf_query, bpf_csum_level, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_skb_cgroup_classid, bpf_redirect_neigh, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_redirect_peer, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_check_mtu, bpf_for_each_map_elem, bpf_snprintf,
bpf_timer_init, bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel,
bpf_task_pt_regs, bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_skb_set_tstamp,
bpf_kptr_xchg, bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock,
bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr,
bpf_ringbuf_discard_dynptr, bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data,
bpf_tcp_raw_gen_syncookie_ipv4, bpf_tcp_raw_gen_syncookie_ipv6,
bpf_tcp_raw_check_syncookie_ipv4, bpf_tcp_raw_check_syncookie_ipv6,
bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain, bpf_cgrp_storage_get,
bpf_cgrp_storage_delete
Program type Available helpers
CHAPTER 7. AVAILABLE BPF FEATURES
95
sched_act bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id,
bpf_skb_store_bytes, bpf_l3_csum_replace, bpf_l4_csum_replace, bpf_tail_call,
bpf_clone_redirect, bpf_get_cgroup_classid, bpf_skb_vlan_push, bpf_skb_vlan_pop,
bpf_skb_get_tunnel_key, bpf_skb_set_tunnel_key, bpf_redirect, bpf_get_route_realm,
bpf_perf_event_output, bpf_skb_load_bytes, bpf_csum_diff, bpf_skb_get_tunnel_opt,
bpf_skb_set_tunnel_opt, bpf_skb_change_proto, bpf_skb_change_type,
bpf_skb_under_cgroup, bpf_get_hash_recalc, bpf_get_current_task,
bpf_skb_change_tail, bpf_skb_pull_data, bpf_csum_update, bpf_set_hash_invalid,
bpf_get_numa_node_id, bpf_skb_change_head, bpf_get_socket_cookie,
bpf_get_socket_uid, bpf_set_hash, bpf_skb_adjust_room, bpf_skb_get_xfrm_state,
bpf_skb_load_bytes_relative, bpf_fib_lookup, bpf_skb_cgroup_id,
bpf_skb_ancestor_cgroup_id, bpf_sk_lookup_tcp, bpf_sk_lookup_udp, bpf_sk_release,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_sk_fullsock, bpf_tcp_sock, bpf_skb_ecn_set_ce,
bpf_get_listener_sock, bpf_skc_lookup_tcp, bpf_tcp_check_syncookie, bpf_strtol,
bpf_strtoul, bpf_sk_storage_get, bpf_sk_storage_delete, bpf_tcp_gen_syncookie,
bpf_probe_read_user, bpf_probe_read_kernel, bpf_probe_read_user_str,
bpf_probe_read_kernel_str, bpf_jiffies64, bpf_sk_assign, bpf_ktime_get_boot_ns,
bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard,
bpf_ringbuf_query, bpf_csum_level, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_skb_cgroup_classid, bpf_redirect_neigh, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_redirect_peer, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_check_mtu, bpf_for_each_map_elem, bpf_snprintf,
bpf_timer_init, bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel,
bpf_task_pt_regs, bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_skb_set_tstamp,
bpf_kptr_xchg, bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock,
bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr,
bpf_ringbuf_discard_dynptr, bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data,
bpf_tcp_raw_gen_syncookie_ipv4, bpf_tcp_raw_gen_syncookie_ipv6,
bpf_tcp_raw_check_syncookie_ipv4, bpf_tcp_raw_check_syncookie_ipv6,
bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain, bpf_cgrp_storage_get,
bpf_cgrp_storage_delete
Program type Available helpers
Red Hat Enterprise Linux 9.3 9.3 Release Notes
96
tracepoint bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem, bpf_probe_read,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_perf_event_read, bpf_perf_event_output, bpf_get_stackid, bpf_get_current_task,
bpf_current_task_under_cgroup, bpf_get_numa_node_id, bpf_probe_read_str,
bpf_perf_event_read_value, bpf_get_stack, bpf_get_current_cgroup_id,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_send_signal, bpf_probe_read_user,
bpf_probe_read_kernel, bpf_probe_read_user_str, bpf_probe_read_kernel_str,
bpf_send_signal_thread, bpf_jiffies64, bpf_get_ns_current_pid_tgid,
bpf_get_current_ancestor_cgroup_id, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_get_task_stack, bpf_copy_from_user, bpf_snprintf_btf, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_task_storage_get, bpf_task_storage_delete,
bpf_get_current_task_btf, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_get_func_ip,
bpf_get_attach_cookie, bpf_task_pt_regs, bpf_get_branch_snapshot, bpf_find_vma,
bpf_loop, bpf_strncmp, bpf_copy_from_user_task, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr,
bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr, bpf_dynptr_read,
bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain,
bpf_cgrp_storage_get, bpf_cgrp_storage_delete
xdp bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_redirect, bpf_perf_event_output, bpf_csum_diff, bpf_get_current_task,
bpf_get_numa_node_id, bpf_xdp_adjust_head, bpf_redirect_map, bpf_xdp_adjust_meta,
bpf_xdp_adjust_tail, bpf_fib_lookup, bpf_sk_lookup_tcp, bpf_sk_lookup_udp,
bpf_sk_release, bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem,
bpf_spin_lock, bpf_spin_unlock, bpf_skc_lookup_tcp, bpf_tcp_check_syncookie,
bpf_strtol, bpf_strtoul, bpf_tcp_gen_syncookie, bpf_probe_read_user,
bpf_probe_read_kernel, bpf_probe_read_user_str, bpf_probe_read_kernel_str,
bpf_jiffies64, bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve,
bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query, bpf_skc_to_tcp6_sock,
bpf_skc_to_tcp_sock, bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock,
bpf_skc_to_udp6_sock, bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr,
bpf_get_current_task_btf, bpf_ktime_get_coarse_ns, bpf_check_mtu,
bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init, bpf_timer_set_callback,
bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs, bpf_skc_to_unix_sock, bpf_loop,
bpf_strncmp, bpf_xdp_get_buff_len, bpf_xdp_load_bytes, bpf_xdp_store_bytes,
bpf_kptr_xchg, bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock,
bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr,
bpf_ringbuf_discard_dynptr, bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data,
bpf_tcp_raw_gen_syncookie_ipv4, bpf_tcp_raw_gen_syncookie_ipv6,
bpf_tcp_raw_check_syncookie_ipv4, bpf_tcp_raw_check_syncookie_ipv6,
bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain, bpf_cgrp_storage_get,
bpf_cgrp_storage_delete
Program type Available helpers
CHAPTER 7. AVAILABLE BPF FEATURES
97
perf_event bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem, bpf_probe_read,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_perf_event_read, bpf_perf_event_output, bpf_get_stackid, bpf_get_current_task,
bpf_current_task_under_cgroup, bpf_get_numa_node_id, bpf_probe_read_str,
bpf_perf_event_read_value, bpf_perf_prog_read_value, bpf_get_stack,
bpf_get_current_cgroup_id, bpf_map_push_elem, bpf_map_pop_elem,
bpf_map_peek_elem, bpf_spin_lock, bpf_spin_unlock, bpf_strtol, bpf_strtoul,
bpf_send_signal, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_send_signal_thread,
bpf_jiffies64, bpf_read_branch_records, bpf_get_ns_current_pid_tgid,
bpf_get_current_ancestor_cgroup_id, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_get_task_stack, bpf_copy_from_user, bpf_snprintf_btf, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_task_storage_get, bpf_task_storage_delete,
bpf_get_current_task_btf, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_get_func_ip,
bpf_get_attach_cookie, bpf_task_pt_regs, bpf_get_branch_snapshot, bpf_find_vma,
bpf_loop, bpf_strncmp, bpf_copy_from_user_task, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr,
bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr, bpf_dynptr_read,
bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain,
bpf_cgrp_storage_get, bpf_cgrp_storage_delete
cgroup_skb bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_perf_event_output, bpf_skb_load_bytes, bpf_get_current_task,
bpf_get_numa_node_id, bpf_get_socket_cookie, bpf_get_socket_uid,
bpf_skb_load_bytes_relative, bpf_skb_cgroup_id, bpf_get_local_storage,
bpf_skb_ancestor_cgroup_id, bpf_sk_lookup_tcp, bpf_sk_lookup_udp, bpf_sk_release,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_sk_fullsock, bpf_tcp_sock, bpf_skb_ecn_set_ce,
bpf_get_listener_sock, bpf_skc_lookup_tcp, bpf_strtol, bpf_strtoul, bpf_sk_storage_get,
bpf_sk_storage_delete, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_ktime_get_boot_ns, bpf_sk_cgroup_id, bpf_sk_ancestor_cgroup_id,
bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard,
bpf_ringbuf_query, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
Red Hat Enterprise Linux 9.3 9.3 Release Notes
98
cgroup_sock bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_get_cgroup_classid, bpf_perf_event_output, bpf_get_current_task,
bpf_get_numa_node_id, bpf_get_socket_cookie, bpf_get_current_cgroup_id,
bpf_get_local_storage, bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem,
bpf_spin_lock, bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_sk_storage_get,
bpf_probe_read_user, bpf_probe_read_kernel, bpf_probe_read_user_str,
bpf_probe_read_kernel_str, bpf_jiffies64, bpf_get_netns_cookie,
bpf_get_current_ancestor_cgroup_id, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs, bpf_loop,
bpf_strncmp, bpf_get_retval, bpf_set_retval, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr,
bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr, bpf_dynptr_read,
bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain,
bpf_cgrp_storage_get, bpf_cgrp_storage_delete
lwt_in bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_cgroup_classid, bpf_get_route_realm, bpf_perf_event_output,
bpf_skb_load_bytes, bpf_csum_diff, bpf_skb_under_cgroup, bpf_get_hash_recalc,
bpf_get_current_task, bpf_skb_pull_data, bpf_get_numa_node_id, bpf_lwt_push_encap,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
CHAPTER 7. AVAILABLE BPF FEATURES
99
lwt_out bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_cgroup_classid, bpf_get_route_realm, bpf_perf_event_output,
bpf_skb_load_bytes, bpf_csum_diff, bpf_skb_under_cgroup, bpf_get_hash_recalc,
bpf_get_current_task, bpf_skb_pull_data, bpf_get_numa_node_id, bpf_map_push_elem,
bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock, bpf_spin_unlock, bpf_strtol,
bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel, bpf_probe_read_user_str,
bpf_probe_read_kernel_str, bpf_jiffies64, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock, bpf_skc_to_tcp_timewait_sock,
bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock, bpf_snprintf_btf,
bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
lwt_xmit bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id,
bpf_skb_store_bytes, bpf_l3_csum_replace, bpf_l4_csum_replace, bpf_tail_call,
bpf_clone_redirect, bpf_get_cgroup_classid, bpf_skb_get_tunnel_key,
bpf_skb_set_tunnel_key, bpf_redirect, bpf_get_route_realm, bpf_perf_event_output,
bpf_skb_load_bytes, bpf_csum_diff, bpf_skb_get_tunnel_opt, bpf_skb_set_tunnel_opt,
bpf_skb_under_cgroup, bpf_get_hash_recalc, bpf_get_current_task,
bpf_skb_change_tail, bpf_skb_pull_data, bpf_csum_update, bpf_set_hash_invalid,
bpf_get_numa_node_id, bpf_skb_change_head, bpf_lwt_push_encap,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_csum_level, bpf_skc_to_tcp6_sock,
bpf_skc_to_tcp_sock, bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock,
bpf_skc_to_udp6_sock, bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr,
bpf_get_current_task_btf, bpf_ktime_get_coarse_ns, bpf_for_each_map_elem,
bpf_snprintf, bpf_timer_init, bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel,
bpf_task_pt_regs, bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
Red Hat Enterprise Linux 9.3 9.3 Release Notes
100
sock_ops bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_perf_event_output, bpf_get_current_task, bpf_get_numa_node_id,
bpf_get_socket_cookie, bpf_setsockopt, bpf_sock_map_update, bpf_getsockopt,
bpf_sock_ops_cb_flags_set, bpf_sock_hash_update, bpf_get_local_storage,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_tcp_sock, bpf_strtol, bpf_strtoul, bpf_sk_storage_get,
bpf_sk_storage_delete, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_get_netns_cookie, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock, bpf_skc_to_tcp_timewait_sock,
bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock, bpf_load_hdr_opt,
bpf_store_hdr_opt, bpf_reserve_hdr_opt, bpf_snprintf_btf, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_get_current_task_btf, bpf_ktime_get_coarse_ns,
bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init, bpf_timer_set_callback,
bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs, bpf_skc_to_unix_sock, bpf_loop,
bpf_strncmp, bpf_kptr_xchg, bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock,
bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr,
bpf_ringbuf_discard_dynptr, bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data,
bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain, bpf_cgrp_storage_get,
bpf_cgrp_storage_delete
sk_skb bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id,
bpf_skb_store_bytes, bpf_tail_call, bpf_perf_event_output, bpf_skb_load_bytes,
bpf_get_current_task, bpf_skb_change_tail, bpf_skb_pull_data, bpf_get_numa_node_id,
bpf_skb_change_head, bpf_get_socket_cookie, bpf_get_socket_uid,
bpf_skb_adjust_room, bpf_sk_redirect_map, bpf_sk_redirect_hash, bpf_sk_lookup_tcp,
bpf_sk_lookup_udp, bpf_sk_release, bpf_map_push_elem, bpf_map_pop_elem,
bpf_map_peek_elem, bpf_spin_lock, bpf_spin_unlock, bpf_skc_lookup_tcp, bpf_strtol,
bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel, bpf_probe_read_user_str,
bpf_probe_read_kernel_str, bpf_jiffies64, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock, bpf_skc_to_tcp_timewait_sock,
bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock, bpf_snprintf_btf,
bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
CHAPTER 7. AVAILABLE BPF FEATURES
101
cgroup_device bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_get_cgroup_classid, bpf_perf_event_output, bpf_get_current_task,
bpf_get_numa_node_id, bpf_get_current_cgroup_id, bpf_get_local_storage,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_get_current_ancestor_cgroup_id, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init, bpf_timer_set_callback,
bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs, bpf_loop, bpf_strncmp,
bpf_kptr_xchg, bpf_map_lookup_percpu_elem, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
sk_msg bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_cgroup_classid,
bpf_perf_event_output, bpf_get_current_task, bpf_get_numa_node_id,
bpf_msg_redirect_map, bpf_msg_apply_bytes, bpf_msg_cork_bytes,
bpf_msg_pull_data, bpf_msg_redirect_hash, bpf_get_current_cgroup_id,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_msg_push_data,
bpf_msg_pop_data, bpf_spin_lock, bpf_spin_unlock, bpf_strtol, bpf_strtoul,
bpf_sk_storage_get, bpf_sk_storage_delete, bpf_probe_read_user,
bpf_probe_read_kernel, bpf_probe_read_user_str, bpf_probe_read_kernel_str,
bpf_jiffies64, bpf_get_netns_cookie, bpf_get_current_ancestor_cgroup_id,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
Red Hat Enterprise Linux 9.3 9.3 Release Notes
102
raw_tracepoint bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem, bpf_probe_read,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_perf_event_read, bpf_perf_event_output, bpf_get_stackid, bpf_get_current_task,
bpf_current_task_under_cgroup, bpf_get_numa_node_id, bpf_probe_read_str,
bpf_perf_event_read_value, bpf_get_stack, bpf_get_current_cgroup_id,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_send_signal, bpf_probe_read_user,
bpf_probe_read_kernel, bpf_probe_read_user_str, bpf_probe_read_kernel_str,
bpf_send_signal_thread, bpf_jiffies64, bpf_get_ns_current_pid_tgid,
bpf_get_current_ancestor_cgroup_id, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_get_task_stack, bpf_copy_from_user, bpf_snprintf_btf, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_task_storage_get, bpf_task_storage_delete,
bpf_get_current_task_btf, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_get_func_ip,
bpf_task_pt_regs, bpf_get_branch_snapshot, bpf_find_vma, bpf_loop, bpf_strncmp,
bpf_copy_from_user_task, bpf_kptr_xchg, bpf_map_lookup_percpu_elem,
bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr,
bpf_ringbuf_discard_dynptr, bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data,
bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain, bpf_cgrp_storage_get,
bpf_cgrp_storage_delete
cgroup_sock_addr bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_get_cgroup_classid, bpf_perf_event_output, bpf_get_current_task,
bpf_get_numa_node_id, bpf_get_socket_cookie, bpf_setsockopt, bpf_getsockopt,
bpf_bind, bpf_get_current_cgroup_id, bpf_get_local_storage, bpf_sk_lookup_tcp,
bpf_sk_lookup_udp, bpf_sk_release, bpf_map_push_elem, bpf_map_pop_elem,
bpf_map_peek_elem, bpf_spin_lock, bpf_spin_unlock, bpf_skc_lookup_tcp, bpf_strtol,
bpf_strtoul, bpf_sk_storage_get, bpf_sk_storage_delete, bpf_probe_read_user,
bpf_probe_read_kernel, bpf_probe_read_user_str, bpf_probe_read_kernel_str,
bpf_jiffies64, bpf_get_netns_cookie, bpf_get_current_ancestor_cgroup_id,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_get_retval, bpf_set_retval,
bpf_kptr_xchg, bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock,
bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr,
bpf_ringbuf_discard_dynptr, bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data,
bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain, bpf_cgrp_storage_get,
bpf_cgrp_storage_delete
Program type Available helpers
CHAPTER 7. AVAILABLE BPF FEATURES
103
lwt_seg6local bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_cgroup_classid, bpf_get_route_realm, bpf_perf_event_output,
bpf_skb_load_bytes, bpf_csum_diff, bpf_skb_under_cgroup, bpf_get_hash_recalc,
bpf_get_current_task, bpf_skb_pull_data, bpf_get_numa_node_id,
bpf_lwt_seg6_store_bytes, bpf_lwt_seg6_adjust_srh, bpf_lwt_seg6_action,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
lirc_mode2 not supported
sk_reuseport bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_skb_load_bytes, bpf_get_current_task, bpf_get_numa_node_id,
bpf_get_socket_cookie, bpf_skb_load_bytes_relative, bpf_sk_select_reuseport,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_snprintf_btf, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_get_current_task_btf, bpf_ktime_get_coarse_ns,
bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init, bpf_timer_set_callback,
bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs, bpf_loop, bpf_strncmp,
bpf_kptr_xchg, bpf_map_lookup_percpu_elem, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
Red Hat Enterprise Linux 9.3 9.3 Release Notes
104
flow_dissector bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_skb_load_bytes, bpf_get_current_task, bpf_get_numa_node_id,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
cgroup_sysctl bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_get_cgroup_classid, bpf_perf_event_output, bpf_get_current_task,
bpf_get_numa_node_id, bpf_get_current_cgroup_id, bpf_get_local_storage,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_sysctl_get_name, bpf_sysctl_get_current_value,
bpf_sysctl_get_new_value, bpf_sysctl_set_new_value, bpf_strtol, bpf_strtoul,
bpf_probe_read_user, bpf_probe_read_kernel, bpf_probe_read_user_str,
bpf_probe_read_kernel_str, bpf_jiffies64, bpf_get_current_ancestor_cgroup_id,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_snprintf_btf, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_get_current_task_btf, bpf_ktime_get_coarse_ns,
bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init, bpf_timer_set_callback,
bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs, bpf_loop, bpf_strncmp,
bpf_kptr_xchg, bpf_map_lookup_percpu_elem, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
CHAPTER 7. AVAILABLE BPF FEATURES
105
raw_tracepoint_wri
table
bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem, bpf_probe_read,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_perf_event_read, bpf_perf_event_output, bpf_get_stackid, bpf_get_current_task,
bpf_current_task_under_cgroup, bpf_get_numa_node_id, bpf_probe_read_str,
bpf_perf_event_read_value, bpf_get_stack, bpf_get_current_cgroup_id,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_send_signal, bpf_probe_read_user,
bpf_probe_read_kernel, bpf_probe_read_user_str, bpf_probe_read_kernel_str,
bpf_send_signal_thread, bpf_jiffies64, bpf_get_ns_current_pid_tgid,
bpf_get_current_ancestor_cgroup_id, bpf_ktime_get_boot_ns, bpf_ringbuf_output,
bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard, bpf_ringbuf_query,
bpf_get_task_stack, bpf_copy_from_user, bpf_snprintf_btf, bpf_per_cpu_ptr,
bpf_this_cpu_ptr, bpf_task_storage_get, bpf_task_storage_delete,
bpf_get_current_task_btf, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_get_func_ip,
bpf_task_pt_regs, bpf_get_branch_snapshot, bpf_find_vma, bpf_loop, bpf_strncmp,
bpf_copy_from_user_task, bpf_kptr_xchg, bpf_map_lookup_percpu_elem,
bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr,
bpf_ringbuf_discard_dynptr, bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data,
bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain, bpf_cgrp_storage_get,
bpf_cgrp_storage_delete
cgroup_sockopt bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_get_cgroup_classid, bpf_perf_event_output, bpf_get_current_task,
bpf_get_numa_node_id, bpf_get_current_cgroup_id, bpf_get_local_storage,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_tcp_sock, bpf_strtol, bpf_strtoul, bpf_sk_storage_get,
bpf_sk_storage_delete, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64,
bpf_get_netns_cookie, bpf_get_current_ancestor_cgroup_id, bpf_ktime_get_boot_ns,
bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit, bpf_ringbuf_discard,
bpf_ringbuf_query, bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr,
bpf_get_current_task_btf, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs, bpf_loop,
bpf_strncmp, bpf_get_retval, bpf_set_retval, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_dynptr_from_mem, bpf_ringbuf_reserve_dynptr,
bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr, bpf_dynptr_read,
bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns, bpf_user_ringbuf_drain,
bpf_cgrp_storage_get, bpf_cgrp_storage_delete
tracing not supported
struct_ops not supported
ext not supported
lsm not supported
Program type Available helpers
Red Hat Enterprise Linux 9.3 9.3 Release Notes
106
sk_lookup bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_perf_event_output, bpf_get_current_task, bpf_get_numa_node_id, bpf_sk_release,
bpf_map_push_elem, bpf_map_pop_elem, bpf_map_peek_elem, bpf_spin_lock,
bpf_spin_unlock, bpf_strtol, bpf_strtoul, bpf_probe_read_user, bpf_probe_read_kernel,
bpf_probe_read_user_str, bpf_probe_read_kernel_str, bpf_jiffies64, bpf_sk_assign,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_snprintf_btf, bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_get_current_task_btf,
bpf_ktime_get_coarse_ns, bpf_for_each_map_elem, bpf_snprintf, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_task_pt_regs,
bpf_skc_to_unix_sock, bpf_loop, bpf_strncmp, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
syscall bpf_map_lookup_elem, bpf_map_update_elem, bpf_map_delete_elem, bpf_probe_read,
bpf_ktime_get_ns, bpf_get_prandom_u32, bpf_get_smp_processor_id, bpf_tail_call,
bpf_get_current_pid_tgid, bpf_get_current_uid_gid, bpf_get_current_comm,
bpf_perf_event_read, bpf_perf_event_output, bpf_get_stackid, bpf_get_current_task,
bpf_current_task_under_cgroup, bpf_get_numa_node_id, bpf_probe_read_str,
bpf_get_socket_cookie, bpf_perf_event_read_value, bpf_get_stack,
bpf_get_current_cgroup_id, bpf_map_push_elem, bpf_map_pop_elem,
bpf_map_peek_elem, bpf_spin_lock, bpf_spin_unlock, bpf_strtol, bpf_strtoul,
bpf_sk_storage_get, bpf_sk_storage_delete, bpf_send_signal, bpf_skb_output,
bpf_probe_read_user, bpf_probe_read_kernel, bpf_probe_read_user_str,
bpf_probe_read_kernel_str, bpf_send_signal_thread, bpf_jiffies64,
bpf_get_ns_current_pid_tgid, bpf_xdp_output, bpf_get_current_ancestor_cgroup_id,
bpf_ktime_get_boot_ns, bpf_ringbuf_output, bpf_ringbuf_reserve, bpf_ringbuf_submit,
bpf_ringbuf_discard, bpf_ringbuf_query, bpf_skc_to_tcp6_sock, bpf_skc_to_tcp_sock,
bpf_skc_to_tcp_timewait_sock, bpf_skc_to_tcp_request_sock, bpf_skc_to_udp6_sock,
bpf_get_task_stack, bpf_d_path, bpf_copy_from_user, bpf_snprintf_btf,
bpf_per_cpu_ptr, bpf_this_cpu_ptr, bpf_task_storage_get, bpf_task_storage_delete,
bpf_get_current_task_btf, bpf_sock_from_file, bpf_for_each_map_elem, bpf_snprintf,
bpf_sys_bpf, bpf_btf_find_by_name_kind, bpf_sys_close, bpf_timer_init,
bpf_timer_set_callback, bpf_timer_start, bpf_timer_cancel, bpf_get_func_ip,
bpf_task_pt_regs, bpf_get_branch_snapshot, bpf_skc_to_unix_sock,
bpf_kallsyms_lookup_name, bpf_find_vma, bpf_loop, bpf_strncmp,
bpf_xdp_get_buff_len, bpf_copy_from_user_task, bpf_kptr_xchg,
bpf_map_lookup_percpu_elem, bpf_skc_to_mptcp_sock, bpf_dynptr_from_mem,
bpf_ringbuf_reserve_dynptr, bpf_ringbuf_submit_dynptr, bpf_ringbuf_discard_dynptr,
bpf_dynptr_read, bpf_dynptr_write, bpf_dynptr_data, bpf_ktime_get_tai_ns,
bpf_user_ringbuf_drain, bpf_cgrp_storage_get, bpf_cgrp_storage_delete
Program type Available helpers
Table 7.3. Available map types
CHAPTER 7. AVAILABLE BPF FEATURES
107
Map type Available
hash yes
array yes
prog_array yes
perf_event_array yes
percpu_hash yes
percpu_array yes
stack_trace yes
cgroup_array yes
lru_hash yes
lru_percpu_hash yes
lpm_trie yes
array_of_maps yes
hash_of_maps yes
devmap yes
sockmap yes
cpumap yes
xskmap yes
sockhash yes
cgroup_storage yes
reuseport_sockarray yes
percpu_cgroup_storage yes
queue yes
stack yes
Red Hat Enterprise Linux 9.3 9.3 Release Notes
108
sk_storage yes
devmap_hash yes
struct_ops yes
ringbuf yes
inode_storage yes
task_storage yes
bloom_filter yes
user_ringbuf yes
cgrp_storage yes
Map type Available
CHAPTER 7. AVAILABLE BPF FEATURES
109
CHAPTER 8. BUG FIXES
This part describes bugs fixed in Red Hat Enterprise Linux 9.3 that have a significant impact on users.
8.1. INSTALLER AND IMAGE CREATION
The installation program now correctly processes the --proxy option of the url Kickstart
command
Previously, the installation program did not correctly process the --proxy option of the url Kickstart
command. As a consequence, you could not use the specified proxy to fetch the installation image. With
this update, the issue is fixed and the --proxy option now works as expected.
Bugzilla:2177219
The --noverifyssl option for liveimg no longer checks the server’s certificate for images
downloaded using HTTPS
Previously, the installation program ignored the --noverifyssl option from the liveimg Kickstart
command. Consequently, if the server’s certificate could not be validated for images downloaded using
the HTTPS protocol, the installation process failed. With this update, this issue has been fixed, and the --
noverifyssl option of the liveimg Kickstart command works correctly.
Bugzilla:2157921
Anaconda now validates LUKS passphrases for the FIPS requirements
Previously, Anaconda did not check whether the length of LUKS passphrases satisfied the FIPS
requirements, even though the underlying tools performed this check. As a consequence, installing in
FIPS mode with a passphrase shorter than 8 characters caused the installer to stop prematurely.
With this update, the installation program has been improved to validate and enforce the minimum
length for passphrase. As a result, the installation program informs if the LUKS passphrase is too short
for use in the FIPS mode and prevents the unexpected stop.
Bugzilla:2163497
The new version of xfsprogs no longer shrinks the size of /boot
Previously, the xfsprogs package with the 5.19 version in the RHEL 9.3 caused the size of /boot to
shrink. As a consequence, it caused a difference in the available space on the /boot partition, if compared
to the RHEL 9.2 version. This fix increases the /boot partition to 600 MiB for all images, instead of 500
MiB, and the /boot partition is no longer affected by space issues.
Jira:RHEL-7999
8.2. SECURITY
OpenSSL commands cms and smime can encrypt files in FIPS mode
Previously, the default configuration of the cms and smime OpenSSL commands used legacy
encryption algorithms, such as 3DES or PKCS #1 v1.5. These algorithms are disabled in FIPS mode. As a
result, encrypting files by using the smime command with the default settings did not work on systems
in FIPS mode. This update introduces the following changes:
In FIPS mode, OpenSSL APIs create CMS data by using OAEP with RSA keys by default.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
110
In FIPS mode, the cms OpenSSL command creates CMS files encrypted with aes-128-cbc and
OAEP when provided RSA keys.
The use of ECDSA keys is unaffected. In non-FIPS mode, OpenSSL APIs and the cms command
continue to use PKCS#1 v1.5 padding and 3DES encryption by default.
As a consequence, you can use the cms and smime OpenSSL commands in FIPS mode to encrypt files.
Bugzilla:2160797
SELinux allows mail replication in Dovecot
You can configure the Dovecot high-performance mail delivery agent for high availability with two-way
replication set, but the SELinux policy previously did not contain rules for the dovecot-deliver utility to
communicate over a pipe in the runtime filesystem. As a consequence, mail replication in Dovecot did
not work. With this update, permissions have been added to the SELinux policy, and as a result, mail
replication in Dovecot works.
Bugzilla:2170495
[1]
Booting from an NFS filesystem now works with SELinux set to enforcing mode
Previously, when using NFS as the root filesystem, SELinux labels were not forwarded from the server,
causing boot failures when SELinux was set to enforcing mode.
With this fix, SELinux has been fixed to correctly flag NFS mounts created before the initial SELinux
policy load as supporting security labels. As a result, the NFS mount now forwards SELinux labels
between the server and the client and the boot can succeed with SELinux set to enforcing mode.
Bugzilla:2218207
[1]
rabbitmq no longer fails with IPv6
Previously, when you deployed rabbitmq server with IPv6 enabled, the inet_gethost command tried to
access the /proc/sys/net/ipv6/conf/all/disable_ipv6 file. Consequently, the system denied access to
/proc/sys/net/ipv6/conf/all/disable_ipv6. With this update, system can now read
/proc/sys/net/ipv6/conf/all/disable_ipv6, and rabbitmq now works with IPv6.
Bugzilla:2184999
Registration to Insights through cloud-init is no longer blocked by SELinux
Previously, the SELinux policy did not contain a rule that allows the cloud-init script to run the insights-
client service. Consequently, an attempt to run the insights-client --register command by the cloud-
init script failed. With this update, the missing rule has been added to the policy, and you can register to
Insights through cloud-init with SELinux in enforcing mode.
Bugzilla:2162663
Users in the staff_r SELinux role can now run scap_workbench probes
Previously, the selinux-policy packages did not contain rules for users in the staff_r SELinux role
required to run the scap-workbench utility. Consequently, scap-workbench probes failed when run by
user in the staff_r SELinux role. With this update, the missing rules have been added to selinux-policy,
and SELinux users can now run scap_workbench probes.
Bugzilla:2112729
CHAPTER 8. BUG FIXES
111
Permissions for insights-client added to the SELinux policy
The insights-client service requires permissions that were not in the previous versions of the selinux-
policy. As a consequence, some components of insights-client did not work correctly and reported
access vector cache (AVC) error messages. This update adds new permissions to the SELinux policy. As
a result, insights-client runs correctly without reporting AVC errors.
Jira:RHELPLAN-163014
[1]
, Bugzilla:2190178, Bugzilla:2224737, Bugzilla:2207894, Bugzilla:2214581
Keylime allowlist generation script updated
The Keylime script create_allowlist.sh generates an allowlist for the Keylime policy. In RHEL 9.3, it was
replaced with the create_runtime_policy.sh script, which failed when trying to convert the allowlist to
the JSON runtime policy.
With this update, the script was reverted to create_allowlist.sh. Now, you can combine the allowlist and
excludelist into the JSON runtime policy by using the keylime_create_policy script.
Jira:RHEL-11866
[1]
Keylime no longer requires a specific file for tls_dir = default
Previously, when the tls_dir variable was set to default in Keylime verifier or registrar configuration,
Keylime rejected custom certificate authority (CA) certificates that had a different file name than
cacert.crt. With this update, the problem no longer occurs, and you can use custom CA certificate files
even with the tls_dir = default setting.
Jira:RHELPLAN-157337
[1]
Environment variables can override Keylime agent options with underscores
Previously, when a Keylime agent configuration option name contained an underscore (_), overriding this
option through environment variables did not work. With this update, the override through environment
variables works correctly even when an option name contains an underscore.
Jira:RHEL-395
[1]
Keylime registrar correctly identifies IPv6 addresses
Previously, the Keylime registrar did not correctly recognize IPv6 addresses, and therefore failed to bind
its listening port. With this update, the registrar properly identifies IPv6 addresses and, consequently,
binds to its port correctly.
Jira:RHEL-392
[1]
Keylime agent correctly handles IPv6 addresses
Previously, when registering a Keylime agent by using an IPv6 address not enclosed in brackets, [ ], the
keylime_tenant utility failed with an error. With this update, keylime_tenant handles IPv6 addresses
correctly even when they are not enclosed in brackets.
Jira:RHEL-393
[1]
Keylime no longer fails measured boot attestation due to new events in QEMU VMs
An update of the edk2-ovmf package introduced a new type of events in the measured boot log for
virtual systems operated by QEMU. These events caused failures in Keylime measured boot attestation.
With this update, Keylime handles these events correctly.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
112
Jira:RHEL-947
[1]
Keylime webhook notifier correctly closes TLS sessions
Previously, the keylime webhook notifier did not correctly close TLS sessions. This caused warnings
being reported on the listener side. This update fixed this issue, and the webhook notifier now correctly
closes TLS sessions.
Jira:RHEL-1252
[1]
gpg-agent now works as an SSH agent in FIPS mode
Previously, the gpg-agent tool created MD5 fingerprints when adding keys to the ssh-agent program
even though FIPS mode disabled the MD5 digest. As a consequence, the ssh-add utility failed to add
the keys to the authentication agent.
With this release, gpg-agent no longer use MD5 checksums. As a result, gpg-agent now works as an
SSH authentication agent also on systems running in FIPS mode.
Bugzilla:2073567
tangd-keygen now handles non-default umask correctly
Previously, the tangd-keygen script did not change file permissions for generated key files.
Consequently, on systems with a default user file-creation mode mask (umask) that prevents reading
keys to other users, the tang-show-keys command returned the error message Internal Error 500
instead of displaying the keys. With this update, tangd-keygen sets file permissions for generated key
files, and therefore the script now works correctly on systems with non-default umask.
Bugzilla:2188743
fapolicyd service no longer runs programs that are removed from the trusted database
Previously, the fapolicyd service incorrectly handled a program as trusted even after it was removed
from the trusted database. As a result, entering the fapolicyd-cli --update command had no effect, and
the program could be executed even after being removed. With this update, the fapolicyd-cli --update
command correctly updates the trusted programs database, and removed programs can no longer be
executed.
Jira:RHEL-622
fapolicyd no longer causes the system to hang after mount and umount
Previously, when the mount or umount actions were run twice followed by the fapolicyd-cli --update
command, the fapolicyd service might enter an endless loop. As a result, the system stopped
responding. With this update, the service runs the fapolicyd-cli --update command correctly, and the
service handles any number of mount or umount actions.
Jira:RHEL-817
Keylime now accepts concatenated PEM certificates
Previously, when Keylime received a certificate chain as multiple certificates in the PEM format
concatenated in a single file, the keylime-agent-rust Keylime component produced a TLS handshake
failure. As a consequence, the client components (keylime_verifier and keylime_tenant) could not
connect to the Keylime agent. With this update, keylime-agent-rust correctly handles multiple
certificates including intermediary CA certificates. As a result, you can now use concatenated PEM
certificates with Keylime.
CHAPTER 8. BUG FIXES
113
Jira:RHEL-396
[1]
Rsyslog can start even without capabilities
When Rsyslog is executed as a normal user or in a containerized environment, the rsyslog process has
no capabilities. Consequently, Rsyslog in this scenario could not drop capabilities and exited at startup.
With this update, the process no longer attempts to drop capabilities if it has no capabilities. As a result,
Rsyslog can start even when it has no capabilities.
Jira:RHELPLAN-160541
[1]
io_uring now works without SELinux denials
Previously, the io_uring kernel interface missed the map permission in the SELinux policy.
Consequently, the mmap system call failed and the io_uring interface did not work properly. With this
update, the map permissions have been allowed in SELinux policy and the interface now works without
SELinux denials.
Bugzilla:2187745
oscap-anaconda-addon can now harden Network Servers for CIS
Previously, installing RHEL Network Servers with a CIS security profile (cis, cis_server_l1,
cis_workstation_l1, or cis_workstation_l2) was not possible with the Network Servers package group
selected. This problem is fixed by excluding the tftp package in oscap-anaconda-addon-2.0.0-17.el9
provided with RHEL 9.3. As a consequence, you can install CIS-hardened RHEL Network Servers with
the Network Servers package group.
Bugzilla:2172264
Rules checking home directories apply only to local users
Multiple compliance profiles provided by the scap-security-guide package contain the following rules
that check the correct configuration of user home directories:
accounts_umask_interactive_users
accounts_user_dot_group_ownership
accounts_user_dot_user_ownership
accounts_user_interactive_home_directory_exists
accounts_users_home_files_groupownership
accounts_users_home_files_ownership
accounts_users_home_files_permissions
file_groupownership_home_directories
file_ownership_home_directories
file_permissions_home_directories
These rules correctly check the configuration of local users. Previously, the scanner also incorrectly
checked the configuration of remote users provided by network sources such as NSS even though the
remediation scripts could not change remote users’ configuration. This was because the OpenSCAP
Red Hat Enterprise Linux 9.3 9.3 Release Notes
114
scanner previously used the getpwent() system call. This update changes the internal implementation of
these rules to depend only on the data from the /etc/passwd file. As a result, the rules now apply only to
the local users’ configuration.
Bugzilla:2203791
Password age rules apply only to local users
Some compliance profiles, for example CIS and DISA STIG, contain the following rules checking
password age and password expiration of user account passwords:
accounts_password_set_max_life_existing
accounts_password_set_min_life_existing
accounts_password_set_warn_age_existing
accounts_set_post_pw_existing
These rules correctly check the configuration of local users. Previously, the scanner also incorrectly
checked the configuration of remote users provided by network sources such as NSS even though the
remediation scripts could not change remote users’ configuration. This was because the OpenSCAP
scanner previously used the getpwent() system call.
This update changes the internal implementation of these rules to depend only on the data from the
/etc/shadow file. As a result, the rules now apply only to the local users’ configuration.
Bugzilla:2213958
Red Hat CVE feeds have been updated
The version 1 of Red Hat Common Vulnerabilities and Exposures (CVE) feeds at
https://access.redhat.com/security/data/oval/ has been discontinued and replaced by the version 2 of
the CVE feeds located at https://access.redhat.com/security/data/oval/v2/.
Consequently, the links in SCAP source data streams provided by the scap-security-guide package
have been updated to link to the new version of the Red Hat CVE feeds.
Bugzilla:2223178
Rules related to journald configuration no longer add extra quotes
Previously, the SCAP Security Guide rules journald_compress, journald_forward_to_syslog, and
journald_storage previously contained a bug in the remediation script which caused adding extra
quotes to the configuration options in the /etc/systemd/journald.conf configuration file. Consequently,
the journald system service failed to parse the configuration options and ignored them. Therefore, the
configuration options were not effective. This caused false pass results in OpenSCAP scans. With this
update, the rules and remediations scripts no longer add the extra quotes. As a result, these rules now
produce a valid configuration for journald.
Bugzilla:2193169
Files under /var/lib/fdo now get the correct SElinux label
Previously, there was a security issue that allowed the FDO process to access the entire host. With this
update, by using the service-info-api server with SElinux, you can add any file to send to the device
under the /var/lib/fdo directory, and, as a consequence, the files under /var/lib/fdo will now get the
correct SElinux label.
CHAPTER 8. BUG FIXES
115
Bugzilla:2229722
8.3. SUBSCRIPTION MANAGEMENT
subscription-manager no longer retains nonessential text in the terminal
Starting with RHEL 9.1, subscription-manager displays progress information while processing any
operation. Previously, for some languages, typically non-Latin, progress messages did not clean up after
the operation finished. With this update, all the messages are cleaned up properly when the operation
finishes.
If you have disabled the progress messages before, you can re-enable them by entering the following
command:
# subscription-manager config --rhsm.progress_messages=1
Bugzilla:2136694
[1]
8.4. SOFTWARE MANAGEMENT
The dnf needs-restarting -s command now correctly displays the list of systemd services
Previously, when you used the needs-restarting command with the -s or --services option, an error
occurred when a non-systemd or malfunctioning process was detected. With this update, the dnf
needs-restarting -s command ignores such processes and displays a warning instead with the list of
affected systemd services.
Bugzilla:2203100
The dnf-automatic command now correctly reports the exit status of transactions
Previously, the dnf-automatic command returned a successful exit code of a transaction even if some
actions during this transaction were not successfully completed. This could cause a security risk on
machines that use dnf-automatic for automatic deployment of errata. With this update, the issue has
been fixed and dnf-automatic now reports every problem with packages during the transaction.
Bugzilla:2212262
Installing packages with IMA signatures on file systems without extended file attributes no
longer fails
Previously, RPM tried to apply IMA signatures to files even if they did not support these signatures. As a
consequence, package installation failed. With this update, RPM skips applying IMA signatures. As a
result, package installation no longer fails.
Bugzilla:2157836
8.5. SHELLS AND COMMAND-LINE TOOLS
The rsyslog logging service now starts at boot of the rescue system
Previously, the rsyslog service for message logging did not automatically start in the rescue system.
The /dev/log socket kept receiving messages during the recovery process with no service listening at
this socket. Consequently, the /dev/log socket was filled with messages and caused the recovery
process to be stuck. For example, the grub2-mkconfig command to regenerate the GRUB
Red Hat Enterprise Linux 9.3 9.3 Release Notes
116
configuration produces a high amount of log messages depending on the number of mounted file
systems. If you used ReaR to recover systems with many mounted file systems, numerous log messages
would fill the /dev/log socket, and the recovery process froze.
With this fix, the systemd units in the rescue system now include the sockets target in the boot
procedure to start the logging socket at boot. As a result, the rsyslog service starts in the rescue
environment when required, and the processes that need to log messages during recovery are no longer
stuck. The recovery process completes successfully and you can find the log messages in the
/var/log/messages file in the rescue RAM disk.
Bugzilla:2172912
The which command no longer fails for a long path
Previously, when you executed the which command in a directory with a path longer than 256
characters, the command failed with the Can’t get current working directory error message. With this
fix, the which command now uses the PATH_MAX value for the path length limit. As a result, the
command no longer fails.
Bugzilla:2181974
ReaR now supports UEFI Secure Boot with OUTPUT=USB
Previously, the OUTPUT=USB ReaR output method, which stores the rescue image on a bootable disk
drive, did not respect the SECURE_BOOT_BOOTLOADER setting. Consequently, on systems with
UEFI Secure Boot enabled, the disk with the rescue image would not boot because the boot loader was
not signed.
With this fix, the OUTPUT=USB ReaR output method now uses the boot loader that you specify in the
SECURE_BOOT_BOOTLOADER setting when creating the rescue disk. To use the signed UEFI shim
boot loader, change the following setting in the /etc/rear/local.conf file:
SECURE_BOOT_BOOTLOADER=/boot/efi/EFI/redhat/shimx64.efi
As a result, the rescue disk is bootable when UEFI Secure Boot is enabled. It is safe to set the variable to
this value on all systems with UEFI, even when Secure Boot is not enabled. It is even recommended for
consistency. For details about the UEFI boot procedure and the shim boot loader, see UEFI: what
happens when booting the system.
Bugzilla:2196445
System recovered by ReaR no longer fails to mount all VG logical volumes
The /etc/lvm/devices/system.devices file represents the Logical Volume Manager (LVM) system
devices and controls device visibility and usability to LVM. By default, the system.devices feature is
enabled in RHEL 9 and when active, it replaces the LVM device filter.
Previously, when you used ReaR to recover the systems to disks with hardware IDs different from those
the original system used, the recovered system did not find all LVM volumes and failed to boot. With this
fix, if ReaR finds the system.devices file, ReaR moves this file to
/etc/lvm/devices/system.devices.rearbak at the end of recovery. As a result, the recovered system
does not use the LVM devices file to restrict device visibility and the system finds the restored volumes
at boot.
Optional: If you want to restore the default behavior and regenerate the LVM devices file, use the
vgimportdevices -a command after booting the recovered system and connecting all disk devices
needed for a normal operation, in case you disconnected any disks before the recovery process.
CHAPTER 8. BUG FIXES
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Bugzilla:2145014
8.6. NETWORKING
Intel Corporation I350 Gigabit Fiber Network Connection now provides a link after kernel
update
Previously, hardware configurations with Small Formfactor Pluggable (SFP) transceiver modules
without External Thermal Sensor (ETS) caused the igb driver to erroneously initialize the Inter-
Integrated Circuit (I2C) to read ETS. As a consequence, connections did not obtain links. With this bug
fix, the igb driver only initializes I2C when SFP with ETS is available. As a result, connections obtain links.
Bugzilla:2173594
[1]
The nm-cloud-setup service no longer removes manually-configured secondary IP
addresses from interfaces
Based on the information received from the cloud environment, the nm-cloud-setup service configured
network interfaces. While you had the option to disable nm-cloud-setup for manual interface
configuration, certain scenarios led to conflicts. In some cases, other services on the host would
independently configure interfaces, including the addition of secondary IP addresses. nm-cloud-setup
incorrectly removed these secondary IP addresses when triggered again by the systemd timer unit. This
update for the NetworkManager package fixes the problem. You only need to wait for the systemd
timer unit to trigger nm-cloud-setup. If you do not want to wait for the timer, you can enable nm-cloud-
setup manually with the following command:
# systemctl enable nm-cloud-setup.service
As a result, nm-cloud-setup no longer removes manually-configured secondary IP addresses from
interfaces.
Bugzilla:2151040
8.7. KERNEL
RHEL previously failed to recognize NVMe disks when VMD was enabled
When you reset or reattached a driver, the Volume Management Device (VMD) domain previously did
not soft-reset. Consequently, the hardware could not properly detect and enumerate its devices. With
this update, the operating system with VMD enabled now correctly recognizes NVMe disks, especially
when resetting a server or working with a VM machine.
Bugzilla:2128610
[1]
8.8. BOOT LOADER
GRUB now correctly handles non-debug kernel variants
Previously, in systems with multiple kernel RPMs installed, entering the dnf install kernel-$VERSION or
dnf update commands set the last-installed kernel as the default kernel. This occurred, for example, in
systems with the standard kernel and real-time kernel on AMD and Intel 64-bit architectures, or kernel
(4k) and kernel-64k on 64-bit ARM architecture. As a consequence, the system could boot into the
unneeded kernel on future reboots. With this update, GRUB uses the DEFAULTKERNEL variable in the
/etc/sysconfig/kernel configuration file, and the default kernel remains the proper variant and latest
version.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
118
For more information, see the Changing the default kernel in Red Hat Enterprise Linux 8 & 9 solution.
Bugzilla:2184069
[1]
8.9. FILE SYSTEMS AND STORAGE
The lpfc driver is in a valid state during the D_ID port swap
Previously, the SAN Boot host, after issuing the NetApp giveback operation, resulted in LVM hung task
warnings and stalled I/O. This problem occurred even when alternate paths were available in a DM-
Multipath environment due to the fiber channel D_ID port swap. As a consequence of the race
condition, the D_ID port swap resulted in an inconsistent state in the lpfc driver, which prevented I/O
from being issued.
With this fix, the lpfc driver now ensures a valid state when the D_ID port swap occurs. As a result, a fiber
channel D_ID port swap does not cause hung I/O.
Bugzilla:2173947
[1]
multipathd adds the persistent reservation registration key to all paths
Previously, when the multipathd daemon started and it recognized a registration key for the persistent
reservations on one path of an existing multipath device, not all paths of that device had the registration
key. As a consequence, if new paths appeared to a multipath device with persistent reservations while
multipathd was stopped, persistent reservations were not set up on those. This allowed IO processing
on the paths, even if they were supposed to be forbidden by the reservation key.
With this fix, if multipathd finds a persistent reservation registration key on any device path, it adds the
key to all active paths. As a result, multipath devices now have persistent reservations set up correctly
on all the paths, even if path devices first appear while multipathd is not running.
Bugzilla:2164869
LUNs are now visible during the operating system installation
Previously, the system was not using the authentication information from firmware sources, specifically
in cases involving iSCSI hardware offload with CHAP (Challenge-Handshake Authentication Protocol)
authentication stored in the iSCSI iBFT (Boot Firmware Table). As a consequence, the iSCSI login failed
during installation.
With the fix in the udisks2-2.9.4-9.el9 firmware authentication, this issue is now resolved and LUNs are
visible during the installation and initial boot.
Bugzilla:2213769
[1]
System boots correctly when adding a NVMe-FC device as a mount point in /etc/fstab
Previously, due to a known issue in the nvme-cli nvmf-autoconnect systemd services, systems failed
to boot while adding the Non-volatile Memory Express over Fibre Channel (NVMe-FC) devices as a
mount point in the /etc/fstab file. Consequently, the system entered into an emergency mode. With this
update, a system boots without any issue when mounting an NVMe-FC device.
Jira:RHEL-8171
[1]
8.10. HIGH AVAILABILITY AND CLUSTERS
CHAPTER 8. BUG FIXES
119
The pcs config checkpoint diff command now works correctly for all configuration sections
As of the RHEL 9.0 release, the pcs config checkpoint diff command had stopped showing the
differences for the following configuration sections: Fencing Levels, Ordering Constraints, Colocation
Constraints, Ticket Constraints, Resources Defaults, and Operations Defaults. As of the RHEL 9.1
release, the pcs config checkpoint diff command had stopped showing the differences for the
Resources and Stonith devices configuration sections. This is because as the code responsible for
displaying each of the different configuration sections switched to a new mechanism for loading CIB
files, the loaded content was cached. The second file used for the difference comparison was not loaded
and the cached content of the first file was used instead. As a result, the diff command yielded no
output. With this fix, the CIB file content is no longer cached and the pcs config checkpoint diff
command shows differences for all configuration sections.
Bugzilla:2175881
pcsd Web UI now displays cluster status when fence levels are configured
Previously, the pcsd Web UI did not display cluster status when fence levels were configured. With this
fix, you can now view the cluster status and change the cluster settings with the Web UI when fence
levels are configured.
Bugzilla:2182810
A fence watchdog configured as a second fencing device now fences a node when the first
device times out
Previously, when a watchdog fencing device was configured as the second device in a fencing topology,
the watchdog timeout would not be considered when calculating the timeout for the fencing operation.
As a result, if the first device timed out the fencing operation would time out even though the watchdog
would fence the node. With this fix, the watchdog timeout is included in the fencing operation timeout
and the fencing operation succeeds if the first device times out.
Bugzilla:2182482
Location constraints with rules no longer displayed when listing is grouped by nodes
Location constraints with rules cannot have a node assigned. Previously, when you grouped the listing by
nodes, location constraints with rules were displayed under an empty node. With this fix, the location
constraints with rules are no longer displayed and a warning is given indicating that constraints with rules
are not displayed.
Bugzilla:1423473
pcs command to update multipath SCSI devices now works correctly
Due to changes in the Pacemaker CIB file, the pcs stonith update-scsi-devices command stopped
working as designed, causing an unwanted restart of some cluster resources. With this fix, this command
works correctly and updates SCSI devices without requiring a restart of other cluster resources running
on the same node.
Bugzilla:2177996
Memory footprint of pcsd-ruby daemon now reduced when pscd Web UI is open
Previously, when the pcsd Web UI was open, memory usage of the pcsd-ruby daemon increased
steadily over the course of several hours. With this fix, the web server that runs in the pcsd-ruby
daemon now periodically performs a graceful restart. This frees the allocated memory and reduces the
memory footprint.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
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Bugzilla:1860626
[1]
The azure-events-az resource agent no longer produces an error with Pacemaker 2.1 and
later
The azure-events-az resource agent executes the crm_simulate -Ls command and parses the output.
With Pacemaker 2.1 and later, the output of the crm_simulate command no longer contains the text
Transition Summary:, which resulted in an error. With this fix, the agent no longer yields an error when
this text is missing.
Bugzilla:2182415
The mysql resource agent now works correctly with promotable clone resources
Previously, the mysql resource agent moved cloned resources that were operating in a Promoted role
between nodes, due to promotion scores changing between promoted and non-promoted values. With
this fix, a node in a Promoted role remains in a Promoted role.
Bugzilla:2179003
[1]
The fence_scsi agent is now able to auto-detect shared lvmlockd devices
Previously, the fence_scsi agent did not auto-detect shared lvmlockd devices. With this update,
fence_scsi is able to auto-detect lvmlockd devices when the devices attribute is not set.
Bugzilla:2187327
8.11. COMPILERS AND DEVELOPMENT TOOLS
The glibc system() function now restores the previous signal mask unconditionally
Previously, if the glibc system() function was called concurrently from multiple threads, the signal mask
for the SIGCHLD signal might not be restored correctly. As a consequence, the SIGCHLD signal
remained blocked after the return from the glibc system() function on some threads.
With this update, the glibc system() function now restores the previous signal mask unconditionally,
even when parallel system() function calls are running. As a result, the SIGCHLD signal is no longer
incorrectly blocked if the glibc system() function is called concurrently from multiple threads.
Bugzilla:2177235
eu-addr2line -C now correctly recognizes other arguments
Previously, when you used the -C argument in eu-addr2line command from elfutils, the following single
character argument disappeared. Consequently, the eu-addr2line -Ci command behaved the same way
as eu-addr2line -C while eu-addr2line -iC worked as expected. This bug has been fixed, and eu-
addr2line -Ci now recognizes both arguments.
Bugzilla:2182059
eu-addr2line -i now correctly handles code compiled with GCC link-time optimization
Previously, the dwarf_getscopes function from the libdw library included in elfutils was unable to find
an abstract origin definition of a function that was compiled with GCC link-time optimization.
Consequently, when you used the -i argument in the eu-addr2line command, eu-addr2line was unable
to show inline functions for code compiled with gcc -flto. With this update, the libdw dwarf_getscopes
function looks in the correct compile unit for the inlined scope, and eu-addr2line -i works as expected.
CHAPTER 8. BUG FIXES
121
Bugzilla:2236182
Programs using papi no longer stop when shutting down
Previously, papi initialized threads before papi initialized some components. Because of this, entries for
certain components describing the number of elements in arrays were not set to correct values and
zero-sized memory allocations were attempted. As a consequence, later accesses and frees of those
zero-sized memory allocations caused the programs to stop.
The bug has been fixed and programs using papi no longer stop when shutting down.
Bugzilla:2215582
The OpenJDK XML signature provider is now functional in FIPS mode
Previously, the OpenJDK XML signature provider was unable to operate in FIPS mode. As a result of
enhancements to FIPS mode support the OpenJDK XML signature provider is now enabled in FIPS
mode.
Bugzilla:2186647
8.12. IDENTITY MANAGEMENT
Paged searches from a regular user now do not impact performance
Previously, when Directory Server was under the search load, paged searches from a regular user could
impact the server performance because a lock conflicted with the thread that polls for network events.
In addition, if a network issue occurred while sending the page search, the whole server was unresponsive
until the nsslapd-iotimeout parameter expired. With this update, the lock was split into several parts to
avoid the contention with the network events. As a result, no performance impact during paged
searches from a regular user.
Bugzilla:1974242
Schema replication now works correctly in Directory Server
Previously, when Directory Server replicated a schema to a new server, it added all the schema to the
99user.ldif file on the remote replica. It seemed it was all custom schema because X-ORIGIN keyword
was set to user defined for all definitions. As a result, it could cause issues with the web console and
possibly for customers who monitor the schema and expect the X-ORIGIN keyword to have specific
values. With this update, schema replication works as expected.
Bugzilla:1759941
Referral mode is now working correctly in Directory Server
Previously, CLI set nsslapd-referral configuration attribute to the backend and not to the mapping tree.
As a result, referral mode did not work. With this update, the nsslapd-referral attribute is set correctly
and the referral mode works as expected.
Bugzilla:2053204
The LMDB import now works faster
Previously, to build the entryrdn index, LMDB import worker threads waited for other worker threads to
ensure that the parent entry was processed. This generated lock contention that drastically slowed
import. With this update, the LDIF import over LMDB database was redesigned and the provider thread
Red Hat Enterprise Linux 9.3 9.3 Release Notes
122
stores the data about the entry RDN and its parents in a temporary database that the worker thread
uses to build the entryrdn index. As a result, worker threads synchronization is no longer needed and the
average import rate is better.
Note that the LMDB import still has an import rate three times slower than the BDB import because
LMDB does not support concurrent write transactions.
Bugzilla:2116948
The dirsrv service now starts correctly after reboot
Previously, dirsrv service could fail to start after reboot because dirsrv service did not explicitly wait for
systemd-tmpfiles-setup.service to finish. This led to a race condition. With this update, dirsrv service
waits for the systemd-tmpfiles-setup.service to finish and no longer fail to start after reboot.
Bugzilla:2179278
Changing a security parameter now works correctly
Previously, when you changed a security parameter by using the dsconf instance_name security set
command, the operation failed with the error:
Name 'log' is not defined
With this update, the security parameter change works as expected.
Bugzilla:2189717
SSSD now uses sAMAccountName when evaluating GPO-based access control
Previously, if ldap_user_name was set to a value other than sAMAccountName on an AD client, GPO-
based access control failed. With this update, SSSD now always uses sAMAccountName when
evaluating GPO-based access control. Even if ldap_user_name is set to a value different from
sAMAccountName on an AD client, GPO-based access control now works correctly.
Jira:SSSD-6107
SSSD now handles duplicate attributes in the user_attributes option when retrieving users
Previously, if sssd.conf contained duplicate attributes in the user_attributes option, SSSD did not
handle these duplicates correctly. As a consequence, users with those attributes could not be retrieved.
With this update, SSSD now handles duplicates correctly. As a result, users with duplicate attributes can
now be retrieved.
Jira:SSSD-6177
The dynamic Kerberos PAC ticket signature enforcement mechanism now fixes cross-
version incompatibility in IdM
Previously, if your Identity Management (IdM) deployment featured servers running on both RHEL 9
and RHEL 8, the incompatibility caused by the upstream implementation of the Privilege Attribute
Certificate (PAC) ticket signature support caused certain operations to fail. With this update, the
implementation of the dynamic ticket signature enforcement mechanism feature in RHEL 9 fixes this
cross-version incompatibility. For this feature to actually take effect, you must:
1. Update all the servers in the domain.
2. Restart all the IdM Kerberos Distribution Center (KDC) services.
CHAPTER 8. BUG FIXES
123
The order of these two actions is important. When starting, the KDCs query the metadata of all the
other servers in the domain to check if they all support the PAC ticket signature. If this is not the case,
the signature will not be enforced.
For more information about the dynamic Kerberos PAC ticket signature enforcement mechanism,
including an example of a constrained delegation request, see this Knowledgebase article.
Jira:RHELDOCS-17011
[1]
, Bugzilla:2182683, Bugzilla:2178298
SHA-1 signature verification can now be allowed in FIPS mode
Previously, it was not possible to allow the use of SHA-1 signature verification when Identity
Management (IdM) was in FIPS mode. This is because IdM uses the FIPS-140-3 standard, which does
not allow SHA-1 signatures. This situation caused problems with Active Directory (AD) interoperability,
because AD only complies with the older FIPS-140-2 standard and therefore requires SHA-1 signatures.
This update introduces a FIPS exception for PKINIT signature verification. When FIPS mode is enabled
in IdM, its restrictions are ignored. Only default mode restrictions are applied, allowing the use of the
SHA1 crypto module even when in FIPS mode. As a result, AD interoperability in FIPS mode works as
intended.
In the scenario of an IdM/AD trust, or using a RHEL 9.2 or later host as an AD client, you need to set the
crypto policy to FIPS:AD-SUPPORT:SHA1 to support PKINIT while in FIPS mode.
Bugzilla:2155607
Deleting the IdM admin user is now no longer permitted
Previously, nothing prevented you from deleting the Identity Management (IdM) admin user if you were
a member of the admins group. The absence of the admin user causes the trust between IdM and
Active Directory (AD) to stop functioning correctly. With this update, you can no longer delete the
admin user. As a result, the IdM-AD trust works correctly.
Bugzilla:2229712
ipa-kdb no longer causes krb5kdc to fail
Previously, the ipa-kdb driver did not differentiate between the absence of a server host object and a
connection failure. Consequently, the krb5kdc server sometimes stopped unexpectedly because of a
NULL LDAP context produced by a connection issue with the LDAP server.
With this update, the ipa-kdb driver correctly identifies connection failures and differentiates between
them and the absence of a server host object. As a result, the krb5kdc server does not fail anymore.
Bugzilla:2227831
The IdM client installer no longer specifies the TLS CA configuration in the ldap.conf file
Previously, the IdM client installer specified the TLS CA configuration in the ldap.conf file. With this
update, OpenLDAP uses the default truststore and the IdM client installer does not set up the TLS CA
configuration in the ldap.conf file.
Bugzilla:2094673
IdM clients correctly retrieve information for trusted AD users when their names contain
mixed case characters
Previously, if you attempted a user lookup or authentication of a user, and that trusted Active Directory
Red Hat Enterprise Linux 9.3 9.3 Release Notes
124
Previously, if you attempted a user lookup or authentication of a user, and that trusted Active Directory
(AD) user contained mixed case characters in their names and they were configured with overrides in
IdM, an error was returned preventing users from accessing IdM resources.
With the release of RHBA-2023:4359, a case-sensitive comparison is replaced with a case-insensitive
comparison that ignores the case of a character. As a result, IdM clients can now lookup users of an AD
trusted domain, even if their usernames contain mixed case characters and they are configured with
overrides in IdM.
Jira:SSSD-6096
8.13. THE WEB CONSOLE
The web console NBDE binding steps now work also on volume groups with a root file
system
In RHEL 9.2, due to a bug in the code for determining whether or not the user was adding a Tang key to
the root file system, the binding process in the web console crashed when there was no file system on
the LUKS container at all. Because the web console displayed the error message TypeError: Qe(…) is
undefined after you had clicked the Trust key button in the Verify key dialog, you had to perform all
the required steps in the command-line interface in the described scenario.
With this update, the web console correctly handles additions of Tang keys to root file systems. As a
result, the web console finishes all binding steps required for the automated unlocking of LUKS-
encrypted volumes using Network-Bound Disk Encryption (NBDE) in various scenarios.
Bugzilla:2203361
VNC console now works at most resolutions
Previously, when using the Virtual Network Computing (VNC) console under certain display resolutions,
a mouse offset problem was present or only a part of the interface was visible. Consequently, using the
VNC console was not possible.
With this update, the problem has been fixed and the VNC console works correctly at most resolutions,
with the exception of ultra high resolutions, such as 3840x2160.
Note that a small offset between the recorded and displayed positions of the cursor might still be
present. However, this does not significantly impact the usability of the VNC console.
Bugzilla:2030836
8.14. RED HAT ENTERPRISE LINUX SYSTEM ROLES
The storage role can now resize the mounted file systems without unmounting
Previously, the storage role was unable to resize mounted devices, even if the file system supported
online resizing. As a consequence, the storage role unmounted all file systems before resizing, which
failed for file systems that were in use, for example, while resizing the / directory of the running system.
With this update, the storage role now supports resizing mounted file systems that support online
resizing such as XFS and Ext4. As a result, the mounted file systems can now be resized without
unmounting them.
Bugzilla:2168692
The podman_registries_conf variable now configures unqualified-search-registries field
CHAPTER 8. BUG FIXES
125
The podman_registries_conf variable now configures unqualified-search-registries field
correctly
Previously, after configuring the podman_registries_conf variable, the podman RHEL system role
failed. Consequently, unqualified-search-registries = ["registry.access.redhat.com"] setting was not
generated in the /etc/containers/registries.conf.d/50-systemroles.conf file. With this update, this
problem has been fixed.
Bugzilla:2211984
The kdump role adds authorized_keys idempotently
Previously, the task to add authorized_key added an extra newline character every time. Consequently
the role was not acting idempotent. With this fix, adding a new authorized_key works correctly and adds
only a single key value idempotently.
Bugzilla:2232241
The kdump system role does not fail if kdump_authorized_keys is missing
Previously, the kdump system role failed to add SSH authorized keys if the user defined in the
kdump_ssh_user variable did not have access to the .ssh directory in the home directory or an empty
.ssh/authorized_keys file. With this fix, the kdump system role now correctly adds authorized keys to
the SSH configuration. As a result, the key based authentication works reliably in the described
scenario.
Bugzilla:2232231
Failure to remove data from member disks before creation no longer persists
Previously, when creating RAID volumes, the system did not effectively eliminate existing data from
member disks before forming the RAID volume. With this update, RAID volumes remove any per-
existing data from member disks as needed.
Bugzilla:2224090
Running the firewall RHEL system role in check mode with non-existent services no longer
fails
Previously, running the firewall role in check mode with non-existent services would fail. This fix
implements better compliance with Ansible best practices for check mode. As a result, non-existent
services being enabled or disabled no longer fails the role in check mode. Instead, a warning prompts you
to confirm that the service is defined in a previous playbook.
Bugzilla:2222428
The firewall RHEL system role on RHEL 7 no longer attempts to install non-existent Python
packages
Previously, when the firewall role on RHEL 7 was called from another role, and that role was using
python3, the firewall role attempted to install the python3-firewall library for that version of Python.
However, that library is not available in RHEL 7. Consequently, the python3-firewall library was not
found, and you received the following error message:
No package matching 'python3-firewall' found available, installed or updated
With this update, the firewall role does not attempt to install the python-firewall or python3-firewall
Red Hat Enterprise Linux 9.3 9.3 Release Notes
126
With this update, the firewall role does not attempt to install the python-firewall or python3-firewall
library. As a result, the firewall role does not fail on RHEL 7 when python3 is installed on the managed
node.
Bugzilla:2216520
kdump RHEL system role updates
The kdump RHEL system role has been updated to a newer version, which brings the following notable
enhancements:
After installing kexec-tools, the utility suite no longer generates the /etc/sysconfig/kdump file
because you do not need to manage this file anymore.
The role supports the auto_reset_crashkernel and dracut_args variables.
For more details, see resources in the /usr/share/doc/rhel-system-roles/kdump/ directory.
Bugzilla:2211187
Insights tags created by using the rhc role are now applied correctly
Previously, when you created Insights tags by using the rhc role, tags were not stored in the correct file.
Consequently, tags were not sent to Insights and as a result they were not applied to the systems in the
Insights inventory.
With this fix, tags are stored correctly and applied to the systems present in the Insights inventory.
Bugzilla:2209200
raid_chunk_size parameter no longer returns an error message
Previously, raid_chunk_size attribute was not allowed for RAID pools and volumes. With this update,
you can now configure the raid_chunk_size attribute for RAID pools and volumes without
encountering any restrictions.
Bugzilla:2193058
The certificate RHEL system role now checks for the certificate key size when determining
whether to perform a new certificate request
Previously, the certificate RHEL system role did not check the key size of a certificate when evaluating
whether to request a new certificate. As a consequence, the role sometimes did not issue new certificate
requests in cases where it should. With this update, certificate now checks the key_size parameter to
determine if a new certificate request should be performed.
Bugzilla:2186057
The kdump role adds multiple keys to authorized_keys idempotently
Previously, adding multiple SSH keys to the authorized_keys file at the same time replaced the key
value of one host by another. This update fixes the problem by using the lineinfile module to manage
the authorized_keys file. lineinfile iterates the tasks in sequence, checking for an existing key and
writing the new key in one atomic operation on a single host at one time. As a result, adding SSH keys on
multiple hosts works correctly, and does not replace the key value from another host.
Note: Use the serial: 1 play serial keyword at play level to control the number of hosts executing at one
time.
CHAPTER 8. BUG FIXES
127
Jira:RHEL-1499
[1]
The kdump role successfully updates .ssh/authorized_keys for kdump_ssh_server
authentication
Previously, the .ssh directory was not accessible by the kdump role to securely authenticate users to
log into kdump_ssh_server. As a consequence, the kdump role did not update the
.ssh/authorized_keys file and the SSH mechanism to verify the kdump_ssh_server failed. This update
fixes the problem. As a result the kdump_ssh_user authentication on kdump_ssh_server works
reliably.
Jira:RHEL-1397
[1]
Enabling kdump for system role requires using the failure_action configuration parameter on
RHEL 9 and later versions
Previously, using the default option during kdump configuration was not successful and printed the
following warning in logs:
kdump: warning: option 'default' was renamed 'failure_action' and will be removed in the future.
please update /etc/kdump.conf to use option 'failure_action' instead.
Consequently, the role did not enable kdump successfully if default option was used. This update fixes
the problem and you can configure kernel dump parameters on multiple systems by using the
failure_action parameter. As a result, enabling kdump works successfully in the described scenario.
Jira:RHEL-906
[1]
The previous: replaced parameter of the firewall system role now overrides the previous
configuration without deleting it
Previously, if you added the previous: replaced parameter to the variable list, the firewall system role
removed all existing user-defined settings and reset firewalld to the default settings. This fix uses the
fallback configuration in firewalld, which was introduced in the EL7 release, to retain the previous
configuration. As a result, when you use the previous: replaced parameter in the variable list, the
firewall.conf configuration file is not deleted on reset, but the file and comments in the file are retained.
Jira:RHEL-1495
[1]
The firewall RHEL system role correctly reports changes when using previous: replaced in
check mode
Previously, the firewall role was not checking whether any files would be changed when using the
previous: replaced parameter in check mode. As a consequence, the role gave an error about undefined
variables. This fix adds new check variables to the check mode to assess whether any files would be
changed by the previous: replaced parameter. The check for the firewalld.conf file assesses the rpm
database to determine whether the file has been changed from the version shipped in the package. As a
result, the firewall role now correctly reports changes when using the previous: replaced parameter.
Jira:RHEL-898
[1]
The firewall RHEL system role correctly reports changes when assigning zones to Network
Manager interfaces
Previously, the Network Manager interface assignment reported changes when no changes were
present. With this fix, the try_set_zone_of_interface module in the file library/firewall_lib.py returns a
Red Hat Enterprise Linux 9.3 9.3 Release Notes
128
second value, which denotes whether the interface’s zone was changed. As a result, the module now
correctly reports changes when assigning zones to interfaces handled by Network Manager.
Jira:RHEL-885
[1]
The rhc system role no longer fails on the registered systems when rhc_auth contains
activation keys
Previously, a failure occurred when you executed playbook files on the registered systems with the
activation key specified in the rhc_auth parameter. This issue has been resolved. It is now possible to
execute playbook files on the already registered systems, even when activation keys are provided in the
rhc_auth parameter.
Bugzilla:2186218
8.15. VIRTUALIZATION
The NVIDIA graphics device continues working after VM shutdown
Previously, in the RHEL kernel, device power transition delays were more closely aligned to those
required by the PCIe specification. As a consequence, some NVIDIA GPUs could become unresponsive
when used for device assignment after a shutdown of the attached VM. This update extends the device
power transition delay for NVIDIA audio device functions. As a result, NVIDIA GPUs continue to work
correctly in this scenario.
Bugzilla:2178956
[1]
Failover virtio NICs are now correctly assigned an IP address on Windows virtual machines
Previously, when starting a Windows virtual machine (VM) with only a failover virtio NIC, the VM failed to
assign an IP address to the NIC. Consequently, the NIC was unable to set up a network connection. This
problem has been fixed and VM NICs now set up network connections as expected in the described
scenario.
Bugzilla:1969724
The installer shows the expected system disk to install RHEL on VM
Previously, when installing RHEL on a VM using virtio-scsi devices, it was possible that these devices did
not appear in the installer because of a device-mapper-multipath bug. Consequently, during
installation, if some devices had a serial set and some did not, the multipath command was claiming all
the devices that had a serial. Due to this, the installer was unable to find the expected system disk to
install RHEL in the VM.
With this update, multipath correctly sets the devices with no serial as having no World Wide Identifier
(WWID) and ignores them. On installation, multipath only claims devices that multipathd uses to bind a
multipath device, and the installer shows the expected system disk to install RHEL in the VM.
Bugzilla:1926147
[1]
Broadcom network adapters now work correctly on Windows VMs after a live migration
Previously, network adapters from the Broadcom family of devices, such as Broadcom, Qlogic, or
Marvell, could not be hot-unplugged during live migration of Windows virtual machines (VMs). As a
consequence, the adapters worked incorrectly after the migration was complete. This problem affected
only adapters that were attached to Windows VMs using Single-root I/O virtualization (SR-IOV). With
this update, the underlying code has been fixed and the problem no longer occurs.
CHAPTER 8. BUG FIXES
129
Jira:RHEL-910, Bugzilla:2091528, Bugzilla:2111319
nodedev-dumpxml lists attributes correctly for certain mediated devices
Before this update, the nodedev-dumpxml utility did not list attributes correctly for mediated devices
that were created using the nodedev-create command. This has been fixed, and nodedev-dumpxml
now displays the attributes of the affected mediated devices properly.
Bugzilla:2143158
virtiofs devices could not be attached after restarting virtqemud or libvirtd
Previously, restarting the virtqemud or libvirtd services prevented virtiofs storage devices from being
attached to virtual machines (VMs) on your host. This bug has been fixed, and you can now attach
virtiofs devices in the described scenario as expected.
Bugzilla:2078693
Hot plugging a Watchdog card to a virtual machine no longer fails
Previously, if no PCI slots were available, adding a Watchdog card to a running virtual machine (VM)
failed with the following error:
Failed to configure watchdog
ERROR Error attempting device hotplug: internal error: No more available PCI slots
With this update, the problem has been fixed and adding a Watchdog card to a running VM now works as
expected.
Bugzilla:2173584
blob resources do not work correctly for virtio-gpu on IBM Z
The virtio-gpu device is currently not compatible with blob memory resources on IBM Z systems. As a
consequence, if you configure a virtual machine (VM) with virtio-gpu on an IBM Z host to use blob
resources, the VM does not have any graphical output.
Jira:RHEL-7135
Red Hat Enterprise Linux 9.3 9.3 Release Notes
130
CHAPTER 9. TECHNOLOGY PREVIEWS
This part provides a list of all Technology Previews available in Red Hat Enterprise Linux 9.
For information on Red Hat scope of support for Technology Preview features, see Technology Preview
Features Support Scope.
9.1. INSTALLER AND IMAGE CREATION
NVMe over Fibre Channel devices are now available in RHEL installation program as a
Technology Preview
You can now add NVMe over Fibre Channel devices to your RHEL installation as a Technology Preview.
In RHEL installation program, you can select these devices under the NVMe Fabrics Devices section
while adding disks on the Installation Destination screen.
Bugzilla:2107346
9.2. SECURITY
gnutls now uses kTLS as a Technology Preview
The updated gnutls packages can use kernel TLS (kTLS) for accelerating data transfer on encrypted
channels as a Technology Preview. To enable kTLS, add the tls.ko kernel module using the modprobe
command, and create a new configuration file /etc/crypto-policies/local.d/gnutls-ktls.txt for the
system-wide cryptographic policies with the following content:
[global]
ktls = true
Note that the current version does not support updating traffic keys through TLS KeyUpdate
messages, which impacts the security of AES-GCM ciphersuites. See the RFC 7841 - TLS 1.3 document
for more information.
Bugzilla:2108532
[1]
9.3. SHELLS AND COMMAND-LINE TOOLS
GIMP available as a Technology Preview in RHEL 9
GNU Image Manipulation Program (GIMP) 2.99.8 is now available in RHEL 9 as a Technology Preview.
The gimp package version 2.99.8 is a pre-release version with a set of improvements, but a limited set
of features and no guarantee for stability. As soon as the official GIMP 3 is released, it will be introduced
into RHEL 9 as an update of this pre-release version.
In RHEL 9, you can install gimp easily as an RPM package.
Bugzilla:2047161
[1]
9.4. INFRASTRUCTURE SERVICES
Socket API for TuneD available as a Technology Preview
The socket API for controlling TuneD through a UNIX domain socket is now available as a Technology
CHAPTER 9. TECHNOLOGY PREVIEWS
131
Preview. The socket API maps one-to-one with the D-Bus API and provides an alternative
communication method for cases where D-Bus is not available. By using the socket API, you can control
the TuneD daemon to optimize the performance, and change the values of various tuning parameters.
The socket API is disabled by default, you can enable it in the tuned-main.conf file.
Bugzilla:2113900
9.5. NETWORKING
WireGuard VPN is available as a Technology Preview
WireGuard, which Red Hat provides as an unsupported Technology Preview, is a high-performance VPN
solution that runs in the Linux kernel. It uses modern cryptography and is easier to configure than other
VPN solutions. Additionally, the small code-basis of WireGuard reduces the surface for attacks and,
therefore, improves the security.
For further details, see Setting up a WireGuard VPN .
Bugzilla:1613522
[1]
kTLS available as a Technology Preview
RHEL provides kernel Transport Layer Security (KTLS) as a Technology Preview. kTLS handles TLS
records using the symmetric encryption or decryption algorithms in the kernel for the AES-GCM cipher.
kTLS also includes the interface for offloading TLS record encryption to Network Interface Controllers
(NICs) that provides this functionality.
Bugzilla:1570255
[1]
The systemd-resolved service is available as a Technology Preview
The systemd-resolved service provides name resolution to local applications. The service implements a
caching and validating DNS stub resolver, a Link-Local Multicast Name Resolution (LLMNR), and
Multicast DNS resolver and responder.
Note that systemd-resolved is an unsupported Technology Preview.
Bugzilla:2020529
The PRP and HSR protocols are now available as a Technology Preview
This update adds the hsr kernel module that provides the following protocols:
Parallel Redundancy Protocol (PRP)
High-availability Seamless Redundancy (HSR)
The IEC 62439-3 standard defines these protocols, and you can use this feature to configure zero-loss
redundancy in Ethernet networks.
Bugzilla:2177256
[1]
Offloading IPsec encapsulation to a NIC is now available as a Technology Preview
This update adds the IPsec packet offloading capabilities to the kernel. Previously, it was possible to only
offload the encryption to a network interface controller (NIC). With this enhancement, the kernel can
now offload the entire IPsec encapsulation process to a NIC to reduce the workload.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
132
Note that offloading the IPsec encapsulation process to a NIC also reduces the ability of the kernel to
monitor and filter such packets.
Bugzilla:2178699
[1]
Network drivers for modems in RHEL are available as Technology Preview
Device manufacturers support Federal Communications Commission (FCC) locking as the default
setting. FCC provides a lock to bind WWAN drivers to a specific system where WWAN drivers provide a
channel to communicate with modems. Based on the modem PCI ID, manufacturers integrate unlocking
tools on Red Hat Enterprise Linux for ModemManager. However, a modem remains unusable if not
unlocked previously even if the WWAN driver is compatible and functional. Red Hat Enterprise Linux
provides the drivers for the following modems with limited functionality as a Technology Preview:
Qualcomm MHI WWAM MBIM - Telit FN990Axx
Intel IPC over Shared Memory (IOSM) - Intel XMM 7360 LTE Advanced
Mediatek t7xx (WWAN) - Fibocom FM350GL
Intel IPC over Shared Memory (IOSM) - Fibocom L860GL modem
Jira:RHELDOCS-16760
[1]
, Bugzilla:2123542, Jira:RHEL-6564, Bugzilla:2110561, Bugzilla:2222914
Segment Routing over IPv6 (SRv6) is available as a Technology Preview
The RHEL kernel provides Segment Routing over IPv6 (SRv6) as a Technology Preview. You can use
this functionality to optimize traffic flows in edge computing or to improve network programmability in
data centers. However, the most significant use case is the end-to-end (E2E) network slicing in 5G
deployment scenarios. In that area, the SRv6 protocol provides you with the programmable custom
network slices and resource reservations to address network requirements for specific applications or
services. At the same time, the solution can be deployed on a single-purpose appliance, and it satisfies
the need for a smaller computational footprint.
Bugzilla:2186375
[1]
kTLS rebased to version 6.3
The kernel Transport Layer Security (KTLS) functionality is a Technology Preview. With this RHEL
release, kTLS has been rebased to the 6.3 upstream version, and notable changes include:
Added the support for 256-bit keys with TX device offload
Delivered various bugfixes
Bugzilla:2183538
[1]
9.6. KERNEL
The kdump mechanism with a unified kernel image is available as a Technology Preview
The kdump mechanism with a kernel image contained in a unified kernel image (UKI) is available as a
Technology Preview. UKI is a single executable, combining the initramfs, vmlinuz,and the kernel
command line in a single file. The UKI key benefit being extending the cryptographic signature for
SecureBoot to all components at once.
For the feature to work, with the kernel command line contained in the UKI, set the crashkernel=
CHAPTER 9. TECHNOLOGY PREVIEWS
133
For the feature to work, with the kernel command line contained in the UKI, set the crashkernel=
parameter with an appropriate value. This reserves the required memory for kdump.
Note: Currently the kexec_file_load system call from the Linux kernel cannot load UKI. Therefore, only
the kernel image contained in the UKI is used when loading the crash kernel with the kexec_file_load
system call.
Bugzilla:2169720
[1]
SGX available as a Technology Preview
Software Guard Extensions (SGX) is an Intel® technology for protecting software code and data from
disclosure and modification. The RHEL kernel partially provides the SGX v1 and v1.5 functionality.
Version 1 enables platforms using the Flexible Launch Control mechanism to use the SGX technology.
Version 2 adds Enclave Dynamic Memory Management (EDMM). Notable features include:
Modifying EPCM permissions of regular enclave pages that belong to an initialized enclave.
Dynamic addition of regular enclave pages to an initialized enclave.
Expanding an initialized enclave to accommodate more threads.
Removing regular and TCS pages from an initialized enclave.
Bugzilla:1874182
[1]
The Intel data streaming accelerator driver for kernel is available as a Technology Preview
The Intel data streaming accelerator driver (IDXD) for the kernel is currently available as a Technology
Preview. It is an Intel CPU integrated accelerator and includes the shared work queue with process
address space ID (pasid) submission and shared virtual memory (SVM).
Bugzilla:2030412
The Soft-iWARP driver is available as a Technology Preview
Soft-iWARP (siw) is a software, Internet Wide-area RDMA Protocol (iWARP), kernel driver for Linux.
Soft-iWARP implements the iWARP protocol suite over the TCP/IP network stack. This protocol suite is
fully implemented in software and does not require a specific Remote Direct Memory Access (RDMA)
hardware. Soft-iWARP enables a system with a standard Ethernet adapter to connect to an iWARP
adapter or to another system with already installed Soft-iWARP.
Bugzilla:2023416
[1]
SGX available as a Technology Preview
Software Guard Extensions (SGX) is an Intel® technology for protecting software code and data from
disclosure and modification. The RHEL kernel partially provides the SGX v1 and v1.5 functionality.
Version 1 enables platforms using the Flexible Launch Control mechanism to use the SGX technology.
Version 2 adds Enclave Dynamic Memory Management (EDMM). Notable features include:
Modifying EPCM permissions of regular enclave pages that belong to an initialized enclave.
Dynamic addition of regular enclave pages to an initialized enclave.
Expanding an initialized enclave to accommodate more threads.
Removing regular and TCS pages from an initialized enclave.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
134
Bugzilla:1660337
[1]
rvu_af, rvu_nicpf, and rvu_nicvf available as Technology Preview
The following kernel modules are available as Technology Preview for Marvell OCTEON TX2
Infrastructure Processor family:
rvu_nicpf - Marvell OcteonTX2 NIC Physical Function driver
rvu_nicvf - Marvell OcteonTX2 NIC Virtual Function driver
rvu_nicvf - Marvell OcteonTX2 RVU Admin Function driver
Bugzilla:2040643
[1]
9.7. FILE SYSTEMS AND STORAGE
DAX is now available for ext4 and XFS as a Technology Preview
In RHEL 9, the DAX file system is available as a Technology Preview. DAX provides means for an
application to directly map persistent memory into its address space. To use DAX, a system must have
some form of persistent memory available, usually in the form of one or more Non-Volatile Dual In-line
Memory Modules (NVDIMMs), and a DAX compatible file system must be created on the NVDIMM(s).
Also, the file system must be mounted with the dax mount option. Then, an mmap of a file on the dax-
mounted file system results in a direct mapping of storage into the application’s address space.
Bugzilla:1995338
[1]
NVMe-oF Discovery Service features available as a Technology Preview
The NVMe-oF Discovery Service features, defined in the NVMexpress.org Technical Proposals (TP)
8013 and 8014, are available as a Technology Preview. To preview these features, use the nvme-cli 2.0
package and attach the host to an NVMe-oF target device that implements TP-8013 or TP-8014. For
more information about TP-8013 and TP-8014, see the NVM Express 2.0 Ratified TPs from the
https://nvmexpress.org/specifications/ website.
Bugzilla:2021672
[1]
nvme-stas package available as a Technology Preview
The nvme-stas package, which is a Central Discovery Controller (CDC) client for Linux, is now available
as a Technology Preview. It handles Asynchronous Event Notifications (AEN), Automated NVMe
subsystem connection controls, Error handling and reporting, and Automatic (zeroconf) and Manual
configuration.
This package consists of two daemons, Storage Appliance Finder (stafd) and Storage Appliance
Connector (stacd).
Bugzilla:1893841
[1]
NVMe TP 8006 in-band authentication available as a Technology Preview
Implementing Non-Volatile Memory Express (NVMe) TP 8006, which is an in-band authentication for
NVMe over Fabrics (NVMe-oF) is now available as an unsupported Technology Preview. The NVMe
Technical Proposal 8006 defines the DH-HMAC-CHAP in-band authentication protocol for NVMe-oF,
which is provided with this enhancement.
For more information, see the dhchap-secret and dhchap-ctrl-secret option descriptions in the nvme-
CHAPTER 9. TECHNOLOGY PREVIEWS
135
For more information, see the dhchap-secret and dhchap-ctrl-secret option descriptions in the nvme-
connect(1) man page.
Bugzilla:2027304
[1]
The io_uring interface is available as a Technology Preview
io_uring is a new and effective asynchronous I/O interface, which is now available as a Technology
Preview. By default, this feature is disabled. You can enable this interface by setting the
kernel.io_uring_disabled sysctl variable to any one of the following values:
0
All processes can create io_uring instances as usual.
1
io_uring creation is disabled for unprivileged processes. The io_uring_setup fails with the -EPERM
error unless the calling process is privileged by the CAP_SYS_ADMIN capability. Existing io_uring
instances can still be used.
2
io_uring creation is disabled for all processes. The io_uring_setup always fails with -EPERM.
Existing io_uring instances can still be used. This is the default setting.
An updated version of the SELinux policy to enable the mmap system call on anonymous inodes is also
required to use this feature.
By using the io_uring command pass-through, an application can issue commands directly to the
underlying hardware, such as nvme. Use of io_uring command pass-through currently requires a custom
SELinux policy module. Create a custom SELinux policy module:
1. Save the following lines as io_uring_cmd_passthrough.cil file:
---cut here---
( allow unconfined_domain_type device_node ( io_uring ( cmd )))
( allow unconfined_domain_type file_type ( io_uring ( cmd )))
---cut here---
2. Load the policy module:
# semodule -i io_uring_cmd_passthrough.cil
Bugzilla:2068237
[1]
9.8. COMPILERS AND DEVELOPMENT TOOLS
jmc-core and owasp-java-encoder available as a Technology Preview
RHEL 9 is distributed with the jmc-core and owasp-java-encoder packages as Technology Preview
features for the AMD and Intel 64-bit architectures.
jmc-core is a library providing core APIs for Java Development Kit (JDK) Mission Control, including
libraries for parsing and writing JDK Flight Recording files, and libraries for Java Virtual Machine (JVM)
discovery through Java Discovery Protocol (JDP).
The owasp-java-encoder package provides a collection of high-performance low-overhead contextual
encoders for Java.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
136
Note that since RHEL 9.2, jmc-core and owasp-java-encoder are available in the CodeReady Linux
Builder (CRB) repository, which you must explicitly enable. See How to enable and make use of content
within CodeReady Linux Builder for more information.
Bugzilla:1980981
9.9. IDENTITY MANAGEMENT
DNSSEC available as Technology Preview in IdM
Identity Management (IdM) servers with integrated DNS now implement DNS Security Extensions
(DNSSEC), a set of extensions to DNS that enhance security of the DNS protocol. DNS zones hosted
on IdM servers can be automatically signed using DNSSEC. The cryptographic keys are automatically
generated and rotated.
Users who decide to secure their DNS zones with DNSSEC are advised to read and follow these
documents:
DNSSEC Operational Practices, Version 2
Secure Domain Name System (DNS) Deployment Guide
DNSSEC Key Rollover Timing Considerations
Note that IdM servers with integrated DNS use DNSSEC to validate DNS answers obtained from other
DNS servers. This might affect the availability of DNS zones that are not configured in accordance with
recommended naming practices.
Bugzilla:2084180
Identity Management JSON-RPC API available as Technology Preview
An API is available for Identity Management (IdM). To view the API, IdM also provides an API browser as
a Technology Preview.
Previously, the IdM API was enhanced to enable multiple versions of API commands. These
enhancements could change the behavior of a command in an incompatible way. Users are now able to
continue using existing tools and scripts even if the IdM API changes. This enables:
Administrators to use previous or later versions of IdM on the server than on the managing
client.
Developers can use a specific version of an IdM call, even if the IdM version changes on the
server.
In all cases, the communication with the server is possible, regardless if one side uses, for example, a
newer version that introduces new options for a feature.
For details on using the API, see Using the Identity Management API to Communicate with the IdM
Server (TECHNOLOGY PREVIEW).
Bugzilla:2084166
sssd-idp sub-package available as a Technology Preview
The sssd-idp sub-package for SSSD contains the oidc_child and krb5 idp plugins, which are client-side
components that perform OAuth2 authentication against Identity Management (IdM) servers. This
feature is available only with IdM servers on RHEL 9.1 and later.
CHAPTER 9. TECHNOLOGY PREVIEWS
137
Bugzilla:2065693
SSSD internal krb5 idp plugin available as a Technology Preview
The SSSD krb5 idp plugin allows you to authenticate against an external identity provider (IdP) using the
OAuth2 protocol. This feature is available only with IdM servers on RHEL 9.1 and later.
Bugzilla:2056482
RHEL IdM allows delegating user authentication to external identity providers as a
Technology Preview
In RHEL IdM, you can now associate users with external identity providers (IdP) that support the OAuth
2 device authorization flow. When these users authenticate with the SSSD version available in RHEL 9.1
or later, they receive RHEL IdM single sign-on capabilities with Kerberos tickets after performing
authentication and authorization at the external IdP.
Notable features include:
Adding, modifying, and deleting references to external IdPs with ipa idp-* commands
Enabling IdP authentication for users with the ipa user-mod --user-auth-type=idp command
For additional information, see Using external identity providers to authenticate to IdM .
Bugzilla:2069202
ACME available as a Technology Preview
The Automated Certificate Management Environment (ACME) service is now available in Identity
Management (IdM) as a Technology Preview. ACME is a protocol for automated identifier validation and
certificate issuance. Its goal is to improve security by reducing certificate lifetimes and avoiding manual
processes from certificate lifecycle management.
In RHEL, the ACME service uses the Red Hat Certificate System (RHCS) PKI ACME responder. The
RHCS ACME subsystem is automatically deployed on every certificate authority (CA) server in the IdM
deployment, but it does not service requests until the administrator enables it. RHCS uses the
acmeIPAServerCert profile when issuing ACME certificates. The validity period of issued certificates is
90 days. Enabling or disabling the ACME service affects the entire IdM deployment.
IMPORTANT
It is recommended to enable ACME only in an IdM deployment where all servers are
running RHEL 8.4 or later. Earlier RHEL versions do not include the ACME service, which
can cause problems in mixed-version deployments. For example, a CA server without
ACME can cause client connections to fail, because it uses a different DNS Subject
Alternative Name (SAN).
WARNING
Currently, RHCS does not remove expired certificates. Because ACME certificates
expire after 90 days, the expired certificates can accumulate and this can affect
performance.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
138
To enable ACME across the whole IdM deployment, use the ipa-acme-manage enable
command:
# ipa-acme-manage enable
The ipa-acme-manage command was successful
To disable ACME across the whole IdM deployment, use the ipa-acme-manage disable
command:
# ipa-acme-manage disable
The ipa-acme-manage command was successful
To check whether the ACME service is installed and if it is enabled or disabled, use the ipa-
acme-manage status command:
# ipa-acme-manage status
ACME is enabled
The ipa-acme-manage command was successful
Bugzilla:2084181
[1]
9.10. DESKTOP
GNOME for the 64-bit ARM architecture available as a Technology Preview
The GNOME desktop environment is available for the 64-bit ARM architecture as a Technology Preview.
You can now connect to the desktop session on a 64-bit ARM server using VNC. As a result, you can
manage the server using graphical applications.
A limited set of graphical applications is available on 64-bit ARM. For example:
The Firefox web browser
Red Hat Subscription Manager (subscription-manager-cockpit)
Firewall Configuration (firewall-config)
Disk Usage Analyzer (baobab)
Using Firefox, you can connect to the Cockpit service on the server.
Certain applications, such as LibreOffice, only provide a command-line interface, and their graphical
interface is disabled.
Jira:RHELPLAN-27394
[1]
GNOME for the IBM Z architecture available as a Technology Preview
The GNOME desktop environment is available for the IBM Z architecture as a Technology Preview.
You can now connect to the desktop session on an IBM Z server using VNC. As a result, you can manage
the server using graphical applications.
A limited set of graphical applications is available on IBM Z. For example:
CHAPTER 9. TECHNOLOGY PREVIEWS
139
The Firefox web browser
Red Hat Subscription Manager (subscription-manager-cockpit)
Firewall Configuration (firewall-config)
Disk Usage Analyzer (baobab)
Using Firefox, you can connect to the Cockpit service on the server.
Certain applications, such as LibreOffice, only provide a command-line interface, and their graphical
interface is disabled.
Jira:RHELPLAN-27737
[1]
9.11. VIRTUALIZATION
Creating nested virtual machines
Nested KVM virtualization is provided as a Technology Preview for KVM virtual machines (VMs) running
on Intel, AMD64, and IBM Z hosts with RHEL 9. With this feature, a RHEL 7, RHEL 8, or RHEL 9 VM that
runs on a physical RHEL 9 host can act as a hypervisor, and host its own VMs.
Jira:RHELDOCS-17040
[1]
AMD SEV and SEV-ES for KVM virtual machines
As a Technology Preview, RHEL 9 provides the Secure Encrypted Virtualization (SEV) feature for AMD
EPYC host machines that use the KVM hypervisor. If enabled on a virtual machine (VM), SEV encrypts
the VM’s memory to protect the VM from access by the host. This increases the security of the VM.
In addition, the enhanced Encrypted State version of SEV (SEV-ES) is also provided as Technology
Preview. SEV-ES encrypts all CPU register contents when a VM stops running. This prevents the host
from modifying the VM’s CPU registers or reading any information from them.
Note that SEV and SEV-ES work only on the 2nd generation of AMD EPYC CPUs (codenamed Rome)
or later. Also note that RHEL 9 includes SEV and SEV-ES encryption, but not the SEV and SEV-ES
security attestation.
Jira:RHELPLAN-65217
[1]
Virtualization is now available on ARM 64
As a Technology Preview, it is now possible to create KVM virtual machines on systems using ARM 64
CPUs.
Jira:RHELPLAN-103993
[1]
virtio-mem is now available on AMD64, Intel 64, and ARM 64
As a Technology Preview, RHEL 9 introduces the virtio-mem feature on AMD64, Intel 64, and ARM 64
systems. Using virtio-mem makes it possible to dynamically add or remove host memory in virtual
machines (VMs).
To use virtio-mem, define virtio-mem memory devices in the XML configuration of a VM and use the
virsh update-memory-device command to request memory device size changes while the VM is
running. To see the current memory size exposed by such memory devices to a running VM, view the
Red Hat Enterprise Linux 9.3 9.3 Release Notes
140
XML configuration of the VM.
Note, however, that virtio-mem currently does not work on VMs that use a Windows operating system.
Bugzilla:2014487, Bugzilla:2044162, Bugzilla:2044172
Intel TDX in RHEL guests
As a Technology Preview, the Intel Trust Domain Extension (TDX) feature can now be used in RHEL 9.2
and later guest operating systems. If the host system supports TDX, you can deploy hardware-isolated
RHEL 9 virtual machines (VMs), called trust domains (TDs). Note, however, that TDX currently does not
work with kdump, and enabling TDX will cause kdump to fail on the VM.
Bugzilla:1955275
[1]
A unified kernel image of RHEL is now available as a Technology Preview
As a Technology Preview, you can now obtain the RHEL kernel as a unified kernel image (UKI) for virtual
machines (VMs). A unified kernel image combines the kernel, initramfs, and kernel command line into a
single signed binary file.
UKIs can be used in virtualized and cloud environments, especially in confidential VMs where strong
SecureBoot capabilities are required. The UKI is available as a kernel-uki-virt package in RHEL 9
repositories.
Currently, the RHEL UKI can only be used in a UEFI boot configuration.
Bugzilla:2142102
[1]
Intel vGPU available as a Technology Preview
As a Technology Preview, it is possible to divide a physical Intel GPU device into multiple virtual devices
referred to as mediated devices. These mediated devices can then be assigned to multiple virtual
machines (VMs) as virtual GPUs. As a result, these VMs share the performance of a single physical Intel
GPU.
Note that this feature is deprecated and was removed entirely with the RHEL 9.3 release.
Jira:RHELDOCS-17050
[1]
9.12. RHEL IN CLOUD ENVIRONMENTS
RHEL is now available on Azure confidential VMs as a Technology Preview
With the updated RHEL kernel, you can now create and run RHEL confidential virtual machines (VMs)
on Microsoft Azure as a Technology Preview. The newly added unified kernel image (UKI) now enables
booting encrypted confidential VM images on Azure. The UKI is available as a kernel-uki-virt package in
RHEL 9 repositories.
Currently, the RHEL UKI can only be used in a UEFI boot configuration.
Jira:RHELPLAN-139800
[1]
9.13. CONTAINERS
SQLite database backend for Podman is available as a Technology Preview
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141
Beginning with Podman v4.6, the SQLite database backend for Podman is available as a Technology
Preview. To set the database backend to SQLite, add the database_backend = "sqlite" option in the
/etc/containers/containers.conf configuration file. Run the podman system reset command to reset
storage back to the initial state before you switch to the SQLite database backend. Note that you have
to re-create all containers and pods. The SQLite database guarantees good stability and consistency.
Other databases in the containers stack will be moved to SQLite as well. The BoltDB remains the default
database backend.
Jira:RHELPLAN-154429
[1]
The podman-machine command is unsupported
The podman-machine command for managing virtual machines, is available only as a Technology
Preview. Instead, run Podman directly from the command line.
Jira:RHELDOCS-16861
[1]
Red Hat Enterprise Linux 9.3 9.3 Release Notes
142
CHAPTER 10. DEPRECATED FUNCTIONALITY
Deprecated devices are fully supported, which means that they are tested and maintained, and their
support status remains unchanged within Red Hat Enterprise Linux 9. However, these devices will likely
not be supported in the next major version release, and are not recommended for new deployments on
the current or future major versions of RHEL.
For the most recent list of deprecated functionality within a particular major release, see the latest
version of release documentation. For information about the length of support, see Red Hat Enterprise
Linux Life Cycle and Red Hat Enterprise Linux Application Streams Life Cycle .
A package can be deprecated and not recommended for further use. Under certain circumstances, a
package can be removed from the product. Product documentation then identifies more recent
packages that offer functionality similar, identical, or more advanced to the one deprecated, and
provides further recommendations.
For information regarding functionality that is present in RHEL 8 but has been removed in RHEL 9, see
Considerations in adopting RHEL 9 .
10.1. INSTALLER AND IMAGE CREATION
Deprecated Kickstart commands
The following Kickstart commands have been deprecated:
timezone --ntpservers
timezone --nontp
logging --level
%packages --excludeWeakdeps
%packages --instLangs
%anaconda
pwpolicy
Note that where only specific options are listed, the base command and its other options are still
available and not deprecated. Using the deprecated commands in Kickstart files prints a warning in the
logs. You can turn the deprecated command warnings into errors with the inst.ksstrict boot option.
Bugzilla:1899167
[1]
User and Group customizations in the edge-commit and edge-container blueprints have been
deprecated
Specifying a user or group customization in the blueprints is deprecated for the edge-commit and
edge-container image types, because the user customization disappears when you upgrade the image
and do not specify the user in the blueprint again.
Note that specifying a user or group customization in blueprints that are used to deploy an existing
OSTree commit, such as edge-raw-image, edge-installer, and edge-simplified-installer image types
remains supported.
CHAPTER 10. DEPRECATED FUNCTIONALITY
143
Bugzilla:2173928
The initial-setup package now has been deprecated
The initial-setup package has been deprecated in Red Hat Enterprise Linux 9.3 and will be removed in
the next major RHEL release. As a replacement, use gnome-initial-setup for the graphical user
interface.
Jira:RHELDOCS-16393
[1]
The provider_hostip and provider_fedora_geoip values of the inst.geoloc boot option are
deprecated
The provider_hostip and provider_fedora_geoip values that specified the GeoIP API for the
inst.geoloc= boot option are deprecated. As a replacement, you can use the
geolocation_provider=URL option to set the required geolocation in the installation program
configuration file. You can still use the inst.geoloc=0 option to disable the geolocation.
Bugzilla:2127473
10.2. SECURITY
SHA-1 is deprecated for cryptographic purposes
The usage of the SHA-1 message digest for cryptographic purposes has been deprecated in RHEL 9.
The digest produced by SHA-1 is not considered secure because of many documented successful
attacks based on finding hash collisions. The RHEL core crypto components no longer create signatures
using SHA-1 by default. Applications in RHEL 9 have been updated to avoid using SHA-1 in security-
relevant use cases.
Among the exceptions, the HMAC-SHA1 message authentication code and the Universal Unique
Identifier (UUID) values can still be created using SHA-1 because these use cases do not currently pose
security risks. SHA-1 also can be used in limited cases connected with important interoperability and
compatibility concerns, such as Kerberos and WPA-2. See the List of RHEL applications using
cryptography that is not compliant with FIPS 140-3 section in the RHEL 9 Security hardening document
for more details.
If your scenario requires the use of SHA-1 for verifying existing or third-party cryptographic signatures,
you can enable it by entering the following command:
# update-crypto-policies --set DEFAULT:SHA1
Alternatively, you can switch the system-wide crypto policies to the LEGACY policy. Note that LEGACY
also enables many other algorithms that are not secure.
Jira:RHELPLAN-110763
[1]
fapolicyd.rules is deprecated
The /etc/fapolicyd/rules.d/ directory for files containing allow and deny execution rules replaces the
/etc/fapolicyd/fapolicyd.rules file. The fagenrules script now merges all component rule files in this
directory to the /etc/fapolicyd/compiled.rules file. Rules in /etc/fapolicyd/fapolicyd.trust are still
processed by the fapolicyd framework but only for ensuring backward compatibility.
Bugzilla:2054740
Red Hat Enterprise Linux 9.3 9.3 Release Notes
144
SCP is deprecated in RHEL 9
The secure copy protocol (SCP) is deprecated because it has known security vulnerabilities. The SCP
API remains available for the RHEL 9 lifecycle but using it reduces system security.
In the scp utility, SCP is replaced by the SSH File Transfer Protocol (SFTP) by default.
The OpenSSH suite does not use SCP in RHEL 9.
SCP is deprecated in the libssh library.
Jira:RHELPLAN-99136
[1]
OpenSSL requires padding for RSA encryption in FIPS mode
OpenSSL no longer supports RSA encryption without padding in FIPS mode. RSA encryption without
padding is uncommon and is rarely used. Note that key encapsulation with RSA (RSASVE) does not use
padding but is still supported.
Bugzilla:2168665
NTLM and Krb4 are deprecated in Cyrus SASL
The NTLM and Kerberos 4 authentication protocols have been deprecated and might be removed in a
future major version of RHEL. These protocols are no longer considered secure and have already been
removed from upstream implementations.
Jira:RHELDOCS-17380
[1]
Digest-MD5 in SASL is deprecated
The Digest-MD5 authentication mechanism in the Simple Authentication Security Layer (SASL)
framework is deprecated, and it might be removed from the cyrus-sasl packages in a future major
release.
Bugzilla:1995600
[1]
OpenSSL deprecates MD2, MD4, MDC2, Whirlpool, Blowfish, CAST, DES, IDEA, RC2, RC4,
RC5, SEED, and PBKDF1
The OpenSSL project has deprecated a set of cryptographic algorithms because they are insecure,
uncommonly used, or both. Red Hat also discourages the use of those algorithms, and RHEL 9 provides
them for migrating encrypted data to use new algorithms. Users must not depend on those algorithms
for the security of their systems.
The implementations of the following algorithms have been moved to the legacy provider in OpenSSL:
MD2, MD4, MDC2, Whirlpool, Blowfish, CAST, DES, IDEA, RC2, RC4, RC5, SEED, and PBKDF1.
See the /etc/pki/tls/openssl.cnf configuration file for instructions on how to load the legacy provider
and enable support for the deprecated algorithms.
Bugzilla:1975836
/etc/system-fips is now deprecated
Support for indicating FIPS mode through the /etc/system-fips file has been removed, and the file will
not be included in future versions of RHEL. To install RHEL in FIPS mode, add the fips=1 parameter to
the kernel command line during the system installation. You can check whether RHEL operates in FIPS
mode by using the fips-mode-setup --check command.
CHAPTER 10. DEPRECATED FUNCTIONALITY
145
Jira:RHELPLAN-103232
[1]
libcrypt.so.1 is now deprecated
The libcrypt.so.1 library is now deprecated, and it might be removed in a future version of RHEL.
Bugzilla:2034569
10.3. SUBSCRIPTION MANAGEMENT
The --token option of the subscription-manager command is deprecated
The --token=<TOKEN> option of the subscription-manager register command is an authentication
method that helps register your system to Red Hat. This option depends on capabilities offered by the
entitlement server. The default entitlement server, subscription.rhsm.redhat.com, is planning to turn
off this capability. As a consequence, attempting to use subscription-manager register --token=
<TOKEN> might fail with the following error message:
Token authentication not supported by the entitlement server
You can continue registering your system using other authorization methods, such as including paired
options --username / --password and --org / --activationkey of the subscription-manager register
command.
Bugzilla:2163716
10.4. SHELLS AND COMMAND-LINE TOOLS
Setting the TMPDIR variable in the ReaR configuration file is deprecated
Setting the TMPDIR environment variable in the /etc/rear/local.conf or /etc/rear/site.conf ReaR
configuration file), by using a statement such as export TMPDIR=…, does not work and is deprecated.
To specify a custom directory for ReaR temporary files, export the variable in the shell environment
before executing ReaR. For example, execute the export TMPDIR=… statement and then execute the
rear command in the same shell session or script.
Jira:RHELDOCS-18049
The dump utility from the dump package has been deprecated
The dump utility used for backup of file systems has been deprecated and will not be available in RHEL
9.
In RHEL 9, Red Hat recommends using the tar, dd, or bacula, backup utility, based on type of usage,
which provides full and safe backups on ext2, ext3, and ext4 file systems.
Note that the restore utility from the dump package remains available and supported in RHEL 9 and is
available as the restore package.
Bugzilla:1997366
[1]
The SQLite database backend in Bacula has been deprecated
The Bacula backup system supported multiple database backends: PostgreSQL, MySQL, and SQLite.
The SQLite backend has been deprecated and will become unsupported in a later release of RHEL. As a
Red Hat Enterprise Linux 9.3 9.3 Release Notes
146
replacement, migrate to one of the other backends (PostgreSQL or MySQL) and do not use the SQLite
backend in new deployments.
Jira:RHEL-6856
10.5. NETWORKING
Network teams are deprecated in RHEL 9
The teamd service and the libteam library are deprecated in Red Hat Enterprise Linux 9 and will be
removed in the next major release. As a replacement, configure a bond instead of a network team.
Red Hat focuses its efforts on kernel-based bonding to avoid maintaining two features, bonds and
teams, that have similar functions. The bonding code has a high customer adoption, is robust, and has an
active community development. As a result, the bonding code receives enhancements and updates.
For details about how to migrate a team to a bond, see Migrating a network team configuration to
network bond.
Bugzilla:1935544
[1]
NetworkManager connection profiles in ifcfg format are deprecated
In RHEL 9.0 and later, connection profiles in ifcfg format are deprecated. The next major RHEL release
will remove the support for this format. However, in RHEL 9, NetworkManager still processes and
updates existing profiles in this format if you modify them.
By default, NetworkManager now stores connection profiles in keyfile format in the
/etc/NetworkManager/system-connections/ directory. Unlike the ifcfg format, the keyfile format
supports all connection settings that NetworkManager provides. For further details about the keyfile
format and how to migrate profiles, see NetworkManager connection profiles in keyfile format .
Bugzilla:1894877
[1]
The iptables back end in firewalld is deprecated
In RHEL 9, the iptables framework is deprecated. As a consequence, the iptables backend and the
direct interface in firewalld are also deprecated. Instead of the direct interface you can use the native
features in firewalld to configure the required rules.
Bugzilla:2089200
The PF_KEYv2 kernel API is deprecated
Applications can configure the kernel’s IPsec implementation by using the PV_KEYv2 and the newer
netlink API. PV_KEYv2 is not actively maintained upstream and misses important security features,
such as modern ciphers, offload, and extended sequence number support. As a result, starting with
RHEL 9.3, the PV_KEYv2 API is deprecated and will be removed in the next major RHEL release. If you
use this kernel API in your application, migrate it to use the modern netlink API as an alternative.
Jira:RHEL-1015
[1]
10.6. KERNEL
ATM encapsulation is deprecated in RHEL 9
CHAPTER 10. DEPRECATED FUNCTIONALITY
147
Asynchronous Transfer Mode (ATM) encapsulation enables Layer-2 (Point-to-Point Protocol, Ethernet)
or Layer-3 (IP) connectivity for the ATM Adaptation Layer 5 (AAL-5). Red Hat has not been providing
support for ATM NIC drivers since RHEL 7. The support for ATM implementation is being dropped in
RHEL 9. These protocols are currently used only in chipsets, which support the ADSL technology and
are being phased out by manufacturers. Therefore, ATM encapsulation is deprecated in Red Hat
Enterprise Linux 9.
For more information, see PPP Over AAL5, Multiprotocol Encapsulation over ATM Adaptation Layer 5 ,
and Classical IP and ARP over ATM .
Bugzilla:2058153
The kexec_load system call for kexec-tools has been deprecated
The kexec_load system call, which loads the second kernel, will not be supported in future RHEL
releases. The kexec_file_load system call replaces kexec_load and is now the default system call on all
architectures.
For more information, see Is kexec_load supported in RHEL9? .
Bugzilla:2113873
[1]
Network teams are deprecated in RHEL 9
The teamd service and the libteam library are deprecated in Red Hat Enterprise Linux 9 and will be
removed in the next major release. As a replacement, configure a bond instead of a network team.
Red Hat focuses its efforts on kernel-based bonding to avoid maintaining two features, bonds and
teams, that have similar functions. The bonding code has a high customer adoption, is robust, and has an
active community development. As a result, the bonding code receives enhancements and updates.
For details about how to migrate a team to a bond, see Migrating a network team configuration to
network bond.
Bugzilla:2013884
[1]
10.7. FILE SYSTEMS AND STORAGE
lvm2-activation-generator and its generated services removed in RHEL 9.0
The lvm2-activation-generator program and its generated services lvm2-activation, lvm2-activation-
early, and lvm2-activation-net are removed in RHEL 9.0. The lvm.conf event_activation setting, used
to activate the services, is no longer functional. The only method for auto activating volume groups is
event based activation.
Bugzilla:2038183
Persistent Memory Development Kit (pmdk) and support library have been deprecated in
RHEL 9
pmdk is a collection of libraries and tools for System Administrators and Application Developers to
simplify managing and accessing persistent memory devices. pmdk and support library have been
deprecated in RHEL 9. This also includes the -debuginfo packages.
The following list of binary packages produced by pmdk, including the nvml source package have been
deprecated:
Red Hat Enterprise Linux 9.3 9.3 Release Notes
148
libpmem
libpmem-devel
libpmem-debug
libpmem2
libpmem2-devel
libpmem2-debug
libpmemblk
libpmemblk-devel
libpmemblk-debug
libpmemlog
libpmemlog-devel
libpmemlog-debug
libpmemobj
libpmemobj-devel
libpmemobj-debug
libpmempool
libpmempool-devel
libpmempool-debug
pmempool
daxio
pmreorder
pmdk-convert
libpmemobj++
libpmemobj++-devel
libpmemobj++-doc
Jira:RHELDOCS-16432
[1]
10.8. DYNAMIC PROGRAMMING LANGUAGES, WEB AND DATABASE
SERVERS
libdb has been deprecated
RHEL 8 and RHEL 9 currently provide Berkeley DB (libdb) version 5.3.28, which is distributed under the
CHAPTER 10. DEPRECATED FUNCTIONALITY
149
RHEL 8 and RHEL 9 currently provide Berkeley DB (libdb) version 5.3.28, which is distributed under the
LGPLv2 license. The upstream Berkeley DB version 6 is available under the AGPLv3 license, which is
more restrictive.
The libdb package is deprecated as of RHEL 9 and might not be available in future major RHEL releases.
In addition, cryptographic algorithms have been removed from libdb in RHEL 9 and multiple libdb
dependencies have been removed from RHEL 9.
Users of libdb are advised to migrate to a different key-value database. For more information, see the
Knowledgebase article Available replacements for the deprecated Berkeley DB (libdb) in RHEL .
Bugzilla:1927780
[1]
, Jira:RHELPLAN-80695, Bugzilla:1974657
10.9. COMPILERS AND DEVELOPMENT TOOLS
Smaller size of keys than 2048 are deprecated by openssl 3.0 in Go’s FIPS mode
Key sizes smaller than 2048 bits are deprecated by openssl 3.0 and no longer work in Go’s FIPS mode.
Bugzilla:2111072
Some PKCS1 v1.5 modes are now deprecated in Go’s FIPS mode
Some PKCS1 v1.5 modes are not approved in FIPS-140-3 for encryption and are disabled. They will no
longer work in Go’s FIPS mode.
Bugzilla:2092016
[1]
10.10. IDENTITY MANAGEMENT
SHA-1 in OpenDNSSec is now deprecated
OpenDNSSec supports exporting Digital Signatures and authentication records using the SHA-1
algorithm. The use of the SHA-1 algorithm is no longer supported. With the RHEL 9 release, SHA-1 in
OpenDNSSec is deprecated and it might be removed in a future minor release. Additionally,
OpenDNSSec support is limited to its integration with Red Hat Identity Management. OpenDNSSec is
not supported standalone.
Bugzilla:1979521
The SSSD implicit files provider domain is disabled by default
The SSSD implicit files provider domain, which retrieves user information from local files such as
/etc/shadow and group information from /etc/groups, is now disabled by default.
To retrieve user and group information from local files with SSSD:
1. Configure SSSD. Choose one of the following options:
a. Explicitly configure a local domain with the id_provider=files option in the sssd.conf
configuration file.
[domain/local]
id_provider=files
...
Red Hat Enterprise Linux 9.3 9.3 Release Notes
150
b. Enable the files provider by setting enable_files_domain=true in the sssd.conf
configuration file.
[sssd]
enable_files_domain = true
2. Configure the name services switch.
# authselect enable-feature with-files-provider
Jira:RHELPLAN-100639
[1]
The SSSD files provider has been deprecated
The SSSD files provider has been deprecated in Red Hat Enterprise Linux (RHEL) 9. The files provider
might be removed from a future release of RHEL.
Jira:RHELPLAN-139805
[1]
The nsslapd-ldapimaprootdn parameter is deprecated
In Directory Server, the nsslapd-ldapimaprootdn configuration parameter is used to map a system root
entry to a root DN entry. Usually, the nsslapd-ldapimaprootdn parameter has the same value as the
nsslapd-rootdn parameter. In addition, changing one attribute but not changing the other leads to a
non-functional autobind configuration that breaks dsconf utility and access to the web console.
With this update, Directory Server uses only the nsslapd-rootdn parameter to map a system root entry
to a root DN entry. As a result, the nsslapd-ldapimaprootdn parameter is deprecated and the root DN
change does not break dsconf utility and access to the web console.
Bugzilla:2170494
The nsslapd-conntablesize configuration parameter has been removed from 389-ds-base
The nsslapd-conntablesize configuration parameter has been removed from the 389-ds-base package
in RHEL 9.3. Previously, the nsslapd-conntablesize configuration attribute specified the size of the
connection table that managed established connections. With the introduction of the multi-listener
feature, which improves the management of established connections, Directory Server now calculates
the size of the connection table dynamically. This also resolves issues, when the connection table size
was set too low and it affected the number of connections the server was able to support. Starting with
RHEL 9.3, use only nsslapd-maxdescriptors and nsslapd-reservedescriptors attributes to manage
the number of TCP/IP connections Directory Server can support.
Bugzilla:2098236
The SMB1 protocol is deprecated in Samba
Starting with Samba 4.11, the insecure Server Message Block version 1 (SMB1) protocol is deprecated
and will be removed in a future release.
To improve the security, by default, SMB1 is disabled in the Samba server and client utilities.
Jira:RHELDOCS-16612
[1]
10.11. DESKTOP
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151
GTK 2 is now deprecated
The legacy GTK 2 toolkit and the following, related packages have been deprecated:
adwaita-gtk2-theme
gnome-common
gtk2
gtk2-immodules
hexchat
Several other packages currently depend on GTK 2. These have been modified so that they no longer
depend on the deprecated packages in a future major RHEL release.
If you maintain an application that uses GTK 2, Red Hat recommends that you port the application to
GTK 4.
Jira:RHELPLAN-131882
[1]
LibreOffice is deprecated
The LibreOffice RPM packages are now deprecated and will be removed in a future major RHEL release.
LibreOffice continues to be fully supported through the entire life cycle of RHEL 7, 8, and 9.
As a replacement for the RPM packages, Red Hat recommends that you install LibreOffice from either
of the following sources provided by The Document Foundation:
The official Flatpak package in the Flathub repository:
https://flathub.org/apps/org.libreoffice.LibreOffice.
The official RPM packages: https://www.libreoffice.org/download/download-libreoffice/.
Jira:RHELDOCS-16300
[1]
10.12. GRAPHICS INFRASTRUCTURES
Motif has been deprecated
The Motif widget toolkit has been deprecated in RHEL, because development in the upstream Motif
community is inactive.
The following Motif packages have been deprecated, including their development and debugging
variants:
motif
openmotif
openmotif21
openmotif22
Additionally, the motif-static package has been removed.
Red Hat recommends using the GTK toolkit as a replacement. GTK is more maintainable and provides
Red Hat Enterprise Linux 9.3 9.3 Release Notes
152
Red Hat recommends using the GTK toolkit as a replacement. GTK is more maintainable and provides
new features compared to Motif.
Jira:RHELPLAN-98983
[1]
10.13. RED HAT ENTERPRISE LINUX SYSTEM ROLES
The network system role displays a deprecation warning when configuring teams on RHEL 9
nodes
The network teaming capabilities have been deprecated in RHEL 9. As a result, using the network RHEL
system role on a RHEL 8 control node to configure a network team on RHEL 9 nodes, shows a warning
about the deprecation.
Bugzilla:1999770
10.14. VIRTUALIZATION
SecureBoot image verification using SHA1-based signatures is deprecated
Performing SecureBoot image verification using SHA1-based signatures on UEFI (PE/COFF)
executables has become deprecated. Instead, Red Hat recommends using signatures based on the
SHA2 algorithm, or later.
Bugzilla:1935497
[1]
Limited support for virtual machine snapshots
Creating snapshots of virtual machines (VMs) is currently only supported for VMs not using the UEFI
firmware. In addition, during the snapshot operation, the QEMU monitor might become blocked, which
negatively impacts the hypervisor performance for certain workloads.
Also note that the current mechanism of creating VM snapshots has been deprecated, and Red Hat does
not recommend using VM snapshots in a production environment. However, a new VM snapshot
mechanism is under development and is planned to be fully implemented in a future minor release of
RHEL 9.
Jira:RHELDOCS-16948
[1]
, Bugzilla:1621944
The virtual floppy driver has become deprecated
The isa-fdc driver, which controls virtual floppy disk devices, is now deprecated, and will become
unsupported in a future release of RHEL. Therefore, to ensure forward compatibility with migrated
virtual machines (VMs), Red Hat discourages using floppy disk devices in VMs hosted on RHEL 9.
Bugzilla:1965079
qcow2-v2 image format is deprecated
With RHEL 9, the qcow2-v2 format for virtual disk images has become deprecated, and will become
unsupported in a future major release of RHEL. In addition, the RHEL 9 Image Builder cannot create disk
images in the qcow2-v2 format.
Instead of qcow2-v2, Red Hat strongly recommends using qcow2-v3. To convert a qcow2-v2 image to a
later format version, use the qemu-img amend command.
Bugzilla:1951814
CHAPTER 10. DEPRECATED FUNCTIONALITY
153
virt-manager has been deprecated
The Virtual Machine Manager application, also known as virt-manager, has been deprecated. The RHEL
web console, also known as Cockpit, is intended to become its replacement in a subsequent release. It is,
therefore, recommended that you use the web console for managing virtualization in a GUI. Note,
however, that some features available in virt-manager might not be yet available in the RHEL web
console.
Jira:RHELPLAN-10304
[1]
libvirtd has become deprecated
The monolithic libvirt daemon, libvirtd, has been deprecated in RHEL 9, and will be removed in a future
major release of RHEL. Note that you can still use libvirtd for managing virtualization on your
hypervisor, but Red Hat recommends switching to the newly introduced modular libvirt daemons. For
instructions and details, see the RHEL 9 Configuring and Managing Virtualization document.
Jira:RHELPLAN-113995
[1]
Legacy CPU models are now deprecated
A significant number of CPU models have become deprecated and will become unsupported for use in
virtual machines (VMs) in a future major release of RHEL. The deprecated models are as follows:
For Intel: models before Intel Xeon 55xx and 75xx Processor families (also known as Nehalem)
For AMD: models before AMD Opteron G4
For IBM Z: models before IBM z14
To check whether your VM is using a deprecated CPU model, use the virsh dominfo utility, and look for
a line similar to the following in the Messages section:
tainted: use of deprecated configuration settings
deprecated configuration: CPU model 'i486'
Bugzilla:2060839
RDMA-based live migration is deprecated
With this update, migrating running virtual machines using Remote Direct Memory Access (RDMA) has
become deprecated. As a result, it is still possible to use the rdma:// migration URI to request migration
over RDMA, but this feature will become unsupported in a future major release of RHEL.
Jira:RHELPLAN-153267
[1]
The Intel vGPU feature has been removed
Previously, as a Technology Preview, it was possible to divide a physical Intel GPU device into multiple
virtual devices referred to as mediated devices. These mediated devices could then be assigned to
multiple virtual machines (VMs) as virtual GPUs. As a result, these VMs shared the performance of a
single physical Intel GPU, however only selected Intel GPUs were compatible with this feature.
Since RHEL 9.3, the Intel vGPU feature has been removed entirely.
Bugzilla:2206599
[1]
Red Hat Enterprise Linux 9.3 9.3 Release Notes
154
10.15. CONTAINERS
Running RHEL 9 containers on a RHEL 7 host is not supported
Running RHEL 9 containers on a RHEL 7 host is not supported. It might work, but it is not guaranteed.
For more information, see Red Hat Enterprise Linux Container Compatibility Matrix .
Jira:RHELPLAN-100087
[1]
SHA1 hash algorithm within Podman has been deprecated
The SHA1 algorithm used to generate the filename of the rootless network namespace is no longer
supported in Podman. Therefore, rootless containers started before updating to Podman 4.1.1 or later
have to be restarted if they are joined to a network (and not just using slirp4netns) to ensure they can
connect to containers started after the upgrade.
Bugzilla:2069279
[1]
rhel9/pause has been deprecated
The rhel9/pause container image has been deprecated.
Bugzilla:2106816
The CNI network stack has been deprecated
The Container Network Interface (CNI) network stack is deprecated and will be removed from Podman
in a future minor release of RHEL. Previously, containers connected to the single Container Network
Interface (CNI) plugin only via DNS. Podman v.4.0 introduced a new Netavark network stack. You can
use the Netavark network stack with Podman and other Open Container Initiative (OCI) container
management applications. The Netavark network stack for Podman is also compatible with advanced
Docker functionalities. Containers in multiple networks can access containers on any of those networks.
For more information, see Switching the network stack from CNI to Netavark .
Jira:RHELDOCS-16756
[1]
The Inkscape and LibreOffice Flatpak images are deprecated
The rhel9/inkscape-flatpak and rhel9/libreoffice-flatpak Flatpak images, which are available as
Technology Previews, have been deprecated.
Red Hat recommends the following alternatives to these images:
To replace rhel9/inkscape-flatpak, use the inkscape RPM package.
To replace rhel9/libreoffice-flatpak, see the LibreOffice deprecation release note.
Jira:RHELDOCS-17102
[1]
10.16. DEPRECATED PACKAGES
This section lists packages that have been deprecated and will probably not be included in a future
major release of Red Hat Enterprise Linux.
For changes to packages between RHEL 8 and RHEL 9, see Changes to packages in the Considerations
CHAPTER 10. DEPRECATED FUNCTIONALITY
155
For changes to packages between RHEL 8 and RHEL 9, see Changes to packages in the Considerations
in adopting RHEL 9 document.
IMPORTANT
The support status of deprecated packages remains unchanged within RHEL 9. For more
information about the length of support, see Red Hat Enterprise Linux Life Cycle and
Red Hat Enterprise Linux Application Streams Life Cycle .
The following packages have been deprecated in RHEL 9:
adwaita-gtk2-theme
autocorr-af
autocorr-bg
autocorr-ca
autocorr-cs
autocorr-da
autocorr-de
autocorr-dsb
autocorr-el
autocorr-en
autocorr-es
autocorr-fa
autocorr-fi
autocorr-fr
autocorr-ga
autocorr-hr
autocorr-hsb
autocorr-hu
autocorr-is
autocorr-it
autocorr-ja
autocorr-ko
autocorr-lb
Red Hat Enterprise Linux 9.3 9.3 Release Notes
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autocorr-lt
autocorr-mn
autocorr-nl
autocorr-pl
autocorr-pt
autocorr-ro
autocorr-ru
autocorr-sk
autocorr-sl
autocorr-sr
autocorr-sv
autocorr-tr
autocorr-vi
autocorr-vro
autocorr-zh
cheese
cheese-libs
clutter
clutter-gst3
clutter-gtk
cogl
daxio
dbus-glib
dbus-glib-devel
enchant
enchant-devel
eog
evolution
evolution-bogofilter
CHAPTER 10. DEPRECATED FUNCTIONALITY
157
evolution-devel
evolution-help
evolution-langpacks
evolution-mapi
evolution-mapi-langpacks
evolution-pst
evolution-spamassassin
festival
festival-data
festvox-slt-arctic-hts
flite
flite-devel
gedit
gedit-plugin-bookmarks
gedit-plugin-bracketcompletion
gedit-plugin-codecomment
gedit-plugin-colorpicker
gedit-plugin-colorschemer
gedit-plugin-commander
gedit-plugin-drawspaces
gedit-plugin-findinfiles
gedit-plugin-joinlines
gedit-plugin-multiedit
gedit-plugin-sessionsaver
gedit-plugin-smartspaces
gedit-plugin-synctex
gedit-plugin-terminal
gedit-plugin-textsize
gedit-plugin-translate
Red Hat Enterprise Linux 9.3 9.3 Release Notes
158
gedit-plugin-wordcompletion
gedit-plugins
gedit-plugins-data
gnome-common
gnome-photos
gnome-photos-tests
gnome-screenshot
gnome-themes-extra
gtk2
gtk2-devel
gtk2-devel-docs
gtk2-immodule-xim
gtk2-immodules
highcontrast-icon-theme
inkscape
inkscape-docs
inkscape-view
iptables-devel
iptables-libs
iptables-nft
iptables-nft-services
iptables-utils
libdb
libgdata
libgdata-devel
libpmem
libpmem-debug
libpmem-devel
libpmem2
CHAPTER 10. DEPRECATED FUNCTIONALITY
159
libpmem2-debug
libpmem2-devel
libpmemblk
libpmemblk-debug
libpmemblk-devel
libpmemlog
libpmemlog-debug
libpmemlog-devel
libpmemobj
libpmemobj-debug
libpmemobj-devel
libpmempool
libpmempool-debug
libpmempool-devel
libreoffice
libreoffice-base
libreoffice-calc
libreoffice-core
libreoffice-data
libreoffice-draw
libreoffice-emailmerge
libreoffice-filters
libreoffice-gdb-debug-support
libreoffice-graphicfilter
libreoffice-gtk3
libreoffice-help-ar
libreoffice-help-bg
libreoffice-help-bn
libreoffice-help-ca
Red Hat Enterprise Linux 9.3 9.3 Release Notes
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libreoffice-help-cs
libreoffice-help-da
libreoffice-help-de
libreoffice-help-dz
libreoffice-help-el
libreoffice-help-en
libreoffice-help-eo
libreoffice-help-es
libreoffice-help-et
libreoffice-help-eu
libreoffice-help-fi
libreoffice-help-fr
libreoffice-help-gl
libreoffice-help-gu
libreoffice-help-he
libreoffice-help-hi
libreoffice-help-hr
libreoffice-help-hu
libreoffice-help-id
libreoffice-help-it
libreoffice-help-ja
libreoffice-help-ko
libreoffice-help-lt
libreoffice-help-lv
libreoffice-help-nb
libreoffice-help-nl
libreoffice-help-nn
libreoffice-help-pl
libreoffice-help-pt-BR
CHAPTER 10. DEPRECATED FUNCTIONALITY
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libreoffice-help-pt-PT
libreoffice-help-ro
libreoffice-help-ru
libreoffice-help-si
libreoffice-help-sk
libreoffice-help-sl
libreoffice-help-sv
libreoffice-help-ta
libreoffice-help-tr
libreoffice-help-uk
libreoffice-help-zh-Hans
libreoffice-help-zh-Hant
libreoffice-impress
libreoffice-langpack-af
libreoffice-langpack-ar
libreoffice-langpack-as
libreoffice-langpack-bg
libreoffice-langpack-bn
libreoffice-langpack-br
libreoffice-langpack-ca
libreoffice-langpack-cs
libreoffice-langpack-cy
libreoffice-langpack-da
libreoffice-langpack-de
libreoffice-langpack-dz
libreoffice-langpack-el
libreoffice-langpack-en
libreoffice-langpack-eo
libreoffice-langpack-es
Red Hat Enterprise Linux 9.3 9.3 Release Notes
162
libreoffice-langpack-et
libreoffice-langpack-eu
libreoffice-langpack-fa
libreoffice-langpack-fi
libreoffice-langpack-fr
libreoffice-langpack-fy
libreoffice-langpack-ga
libreoffice-langpack-gl
libreoffice-langpack-gu
libreoffice-langpack-he
libreoffice-langpack-hi
libreoffice-langpack-hr
libreoffice-langpack-hu
libreoffice-langpack-id
libreoffice-langpack-it
libreoffice-langpack-ja
libreoffice-langpack-kk
libreoffice-langpack-kn
libreoffice-langpack-ko
libreoffice-langpack-lt
libreoffice-langpack-lv
libreoffice-langpack-mai
libreoffice-langpack-ml
libreoffice-langpack-mr
libreoffice-langpack-nb
libreoffice-langpack-nl
libreoffice-langpack-nn
libreoffice-langpack-nr
libreoffice-langpack-nso
CHAPTER 10. DEPRECATED FUNCTIONALITY
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libreoffice-langpack-or
libreoffice-langpack-pa
libreoffice-langpack-pl
libreoffice-langpack-pt-BR
libreoffice-langpack-pt-PT
libreoffice-langpack-ro
libreoffice-langpack-ru
libreoffice-langpack-si
libreoffice-langpack-sk
libreoffice-langpack-sl
libreoffice-langpack-sr
libreoffice-langpack-ss
libreoffice-langpack-st
libreoffice-langpack-sv
libreoffice-langpack-ta
libreoffice-langpack-te
libreoffice-langpack-th
libreoffice-langpack-tn
libreoffice-langpack-tr
libreoffice-langpack-ts
libreoffice-langpack-uk
libreoffice-langpack-ve
libreoffice-langpack-xh
libreoffice-langpack-zh-Hans
libreoffice-langpack-zh-Hant
libreoffice-langpack-zu
libreoffice-math
libreoffice-ogltrans
libreoffice-opensymbol-fonts
Red Hat Enterprise Linux 9.3 9.3 Release Notes
164
libreoffice-pdfimport
libreoffice-pyuno
libreoffice-sdk
libreoffice-sdk-doc
libreoffice-ure
libreoffice-ure-common
libreoffice-wiki-publisher
libreoffice-writer
libreoffice-x11
libreoffice-xsltfilter
libreofficekit
libsoup
libsoup-devel
libuser
libuser-devel
libwpe
libwpe-devel
mcpp
mod_auth_mellon
motif
motif-devel
pmdk-convert
pmempool
python3-pytz
qt5
qt5-assistant
qt5-designer
qt5-devel
qt5-doctools
CHAPTER 10. DEPRECATED FUNCTIONALITY
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qt5-linguist
qt5-qdbusviewer
qt5-qt3d
qt5-qt3d-devel
qt5-qt3d-doc
qt5-qt3d-examples
qt5-qtbase
qt5-qtbase-common
qt5-qtbase-devel
qt5-qtbase-doc
qt5-qtbase-examples
qt5-qtbase-gui
qt5-qtbase-mysql
qt5-qtbase-odbc
qt5-qtbase-postgresql
qt5-qtbase-private-devel
qt5-qtbase-static
qt5-qtconnectivity
qt5-qtconnectivity-devel
qt5-qtconnectivity-doc
qt5-qtconnectivity-examples
qt5-qtdeclarative
qt5-qtdeclarative-devel
qt5-qtdeclarative-doc
qt5-qtdeclarative-examples
qt5-qtdeclarative-static
qt5-qtdoc
qt5-qtgraphicaleffects
qt5-qtgraphicaleffects-doc
Red Hat Enterprise Linux 9.3 9.3 Release Notes
166
qt5-qtimageformats
qt5-qtimageformats-doc
qt5-qtlocation
qt5-qtlocation-devel
qt5-qtlocation-doc
qt5-qtlocation-examples
qt5-qtmultimedia
qt5-qtmultimedia-devel
qt5-qtmultimedia-doc
qt5-qtmultimedia-examples
qt5-qtquickcontrols
qt5-qtquickcontrols-doc
qt5-qtquickcontrols-examples
qt5-qtquickcontrols2
qt5-qtquickcontrols2-devel
qt5-qtquickcontrols2-doc
qt5-qtquickcontrols2-examples
qt5-qtscript
qt5-qtscript-devel
qt5-qtscript-doc
qt5-qtscript-examples
qt5-qtsensors
qt5-qtsensors-devel
qt5-qtsensors-doc
qt5-qtsensors-examples
qt5-qtserialbus
qt5-qtserialbus-devel
qt5-qtserialbus-doc
qt5-qtserialbus-examples
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qt5-qtserialport
qt5-qtserialport-devel
qt5-qtserialport-doc
qt5-qtserialport-examples
qt5-qtsvg
qt5-qtsvg-devel
qt5-qtsvg-doc
qt5-qtsvg-examples
qt5-qttools
qt5-qttools-common
qt5-qttools-devel
qt5-qttools-doc
qt5-qttools-examples
qt5-qttools-libs-designer
qt5-qttools-libs-designercomponents
qt5-qttools-libs-help
qt5-qttools-static
qt5-qttranslations
qt5-qtwayland
qt5-qtwayland-devel
qt5-qtwayland-doc
qt5-qtwayland-examples
qt5-qtwebchannel
qt5-qtwebchannel-devel
qt5-qtwebchannel-doc
qt5-qtwebchannel-examples
qt5-qtwebsockets
qt5-qtwebsockets-devel
qt5-qtwebsockets-doc
Red Hat Enterprise Linux 9.3 9.3 Release Notes
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qt5-qtwebsockets-examples
qt5-qtx11extras
qt5-qtx11extras-devel
qt5-qtx11extras-doc
qt5-qtxmlpatterns
qt5-qtxmlpatterns-devel
qt5-qtxmlpatterns-doc
qt5-qtxmlpatterns-examples
qt5-rpm-macros
qt5-srpm-macros
webkit2gtk3
webkit2gtk3-devel
webkit2gtk3-jsc
webkit2gtk3-jsc-devel
wpebackend-fdo
wpebackend-fdo-devel
xorg-x11-server-Xorg
CHAPTER 10. DEPRECATED FUNCTIONALITY
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CHAPTER 11. KNOWN ISSUES
This part describes known issues in Red Hat Enterprise Linux 9.3.
11.1. INSTALLER AND IMAGE CREATION
The auth and authconfig Kickstart commands require the AppStream repository
The authselect-compat package is required by the auth and authconfig Kickstart commands during
installation. Without this package, the installation fails if auth or authconfig are used. However, by
design, the authselect-compat package is only available in the AppStream repository.
To work around this problem, verify that the BaseOS and AppStream repositories are available to the
installation program or use the authselect Kickstart command during installation.
Bugzilla:1640697
[1]
The reboot --kexec and inst.kexec commands do not provide a predictable system state
Performing a RHEL installation with the reboot --kexec Kickstart command or the inst.kexec kernel
boot parameters do not provide the same predictable system state as a full reboot. As a consequence,
switching to the installed system without rebooting can produce unpredictable results.
Note that the kexec feature is deprecated and will be removed in a future release of Red Hat Enterprise
Linux.
Bugzilla:1697896
[1]
Unexpected SELinux policies on systems where Anaconda is running as an application
When Anaconda is running as an application on an already installed system (for example to perform
another installation to an image file using the –image anaconda option), the system is not prohibited to
modify the SELinux types and attributes during installation. As a consequence, certain elements of
SELinux policy might change on the system where Anaconda is running.
To work around this problem, do not run Anaconda on the production system. Instead, run Anaconda in a
temporary virtual machine to keep the SELinux policy unchanged on a production system. Running
anaconda as part of the system installation process such as installing from boot.iso or dvd.iso is not
affected by this issue.
Bugzilla:2050140
Local Media installation source is not detected when booting the installation from a USB
that is created using a third party tool
When booting the RHEL installation from a USB that is created using a third party tool, the installer fails
to detect the Local Media installation source (only Red Hat CDN is detected).
This issue occurs because the default boot option int.stage2= attempts to search for iso9660 image
format. However, a third party tool might create an ISO image with a different format.
As a workaround, use either of the following solution:
When booting the installation, click the Tab key to edit the kernel command line, and change
the boot option inst.stage2= to inst.repo=.
To create a bootable USB device on Windows, use Fedora Media Writer.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
170
When using a third party tool such as Rufus to create a bootable USB device, first regenerate
the RHEL ISO image on a Linux system, and then use the third party tool to create a bootable
USB device.
For more information on the steps involved in performing any of the specified workaround, see,
Installation media is not auto-detected during the installation of RHEL 8.3 .
Bugzilla:1877697
[1]
The USB CD-ROM drive is not available as an installation source in Anaconda
Installation fails when the USB CD-ROM drive is the source for it and the Kickstart ignoredisk --only-
use= command is specified. In this case, Anaconda cannot find and use this source disk.
To work around this problem, use the harddrive --partition=sdX --dir=/ command to install from USB
CD-ROM drive. As a result, the installation does not fail.
Jira:RHEL-4707
Hard drive partitioned installations with iso9660 filesystem fails
You cannot install RHEL on systems where the hard drive is partitioned with the iso9660 filesystem.
This is due to the updated installation code that is set to ignore any hard disk containing a iso9660 file
system partition. This happens even when RHEL is installed without using a DVD.
To workaround this problem, add the following script in the Kickstart file to format the disc before the
installation starts.
Note: Before performing the workaround, backup the data available on the disk. The wipefs command
formats all the existing data from the disk.
%pre
wipefs -a /dev/sda
%end
As a result, installations work as expected without any errors.
Jira:RHEL-4711
Anaconda fails to verify existence of an administrator user account
While installing RHEL using a graphical user interface, Anaconda fails to verify if the administrator
account has been created. As a consequence, users might install a system without any administrator
user account.
To work around this problem, ensure you configure an administrator user account or the root password
is set and the root account is unlocked. As a result, users can perform administrative tasks on the
installed system.
Bugzilla:2047713
New XFS features prevent booting of PowerNV IBM POWER systems with firmware older
than version 5.10
PowerNV IBM POWER systems use a Linux kernel for firmware, and use Petitboot as a replacement for
GRUB. This results in the firmware kernel mounting /boot and Petitboot reading the GRUB config and
booting RHEL.
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171
The RHEL 9 kernel introduces bigtime=1 and inobtcount=1 features to the XFS filesystem, which
kernels with firmware older than version 5.10 do not understand.
To work around this problem, you can use another filesystem for /boot, for example ext4.
Bugzilla:1997832
[1]
RHEL for Edge installer image fails to create mount points when installing an rpm-ostree
payload
When deploying rpm-ostree payloads, used for example in a RHEL for Edge installer image, the installer
does not properly create some mount points for custom partitions. As a consequence, the installation is
aborted with the following error:
The command 'mount --bind /mnt/sysimage/data /mnt/sysroot/data' exited with the code 32.
To work around this issue:
Use an automatic partitioning scheme and do not add any mount points manually.
Manually assign mount points only inside /var directory. For example, /var/my-mount-point),
and the following standard directories: /, /boot, /var.
As a result, the installation process finishes successfully.
Jira:RHEL-4741
NetworkManager fails to start after the installation when connected to a network but
without DHCP or a static IP address configured
Starting with RHEL 9.0, Anaconda activates network devices automatically when there is no specific ip=
or Kickstart network configuration set. Anaconda creates a default persistent configuration file for each
Ethernet device. The connection profile has the ONBOOT and autoconnect value set to true. As a
consequence, during the start of the installed system, RHEL activates the network devices, and the
networkManager-wait-online service fails.
As a workaround, do one of the following:
Delete all connections using the nmcli utility except one connection you want to use. For
example:
a. List all connection profiles:
# nmcli connection show
b. Delete the connection profiles that you do not require:
# nmcli connection delete <connection_name>
Replace <connection_name> with the name of the connection you want to delete.
Disable the auto connect network feature in Anaconda if no specific ip= or Kickstart network
configuration is set.
a. In the Anaconda GUI, navigate to Network & Host Name.
b. Select a network device to disable.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
172
c. Click Configure.
d. On the General tab, clear the Connect automatically with priority checkbox.
e. Click Save.
Bugzilla:2115783
[1]
Unable to load an updated driver from the driver update disc in the installation
environment
A new version of a driver from the driver update disc might not load if the same driver from the
installation initial RM disk has already been loaded. As a consequence, an updated version of the driver
cannot be applied to the installation environment.
As a workaround, use the modprobe.blacklist= kernel command line option together with the inst.dd
option. For example, to ensure that an updated version of the virtio_blk driver from a driver update disc
is loaded, use modprobe.blacklist=virtio_blk and then continue with the usual procedure to apply
drivers from the driver update disk. As a result, the system can load an updated version of the driver and
use it in the installation environment.
Jira:RHEL-4762
Kickstart installations fail to configure the network connection
Anaconda performs the Kickstart network configuration only through the NetworkManager API.
Anaconda processes the network configuration after the %pre Kickstart section. As a consequence,
some tasks from the Kickstart %pre section are blocked. For example, downloading packages from the
%pre section fails due to unavailability of the network configuration.
To work around this problem:
Configure the network, for example using the nmcli tool, as a part of the %pre script.
Use the installer boot options to configure the network for the %pre script.
As a result, it is possible to use the network for tasks in the %pre section and the Kickstart installation
process completes.
Bugzilla:2173992
Enabling the FIPS mode is not supported when building rpm-ostree images with RHEL image
builder
Currently, there is no support to enable the FIPS mode when building rpm-ostree images with RHEL
image builder.
Jira:RHEL-4655
Images built with the stig profile remediation fails to boot with FIPS error
FIPS mode is not supported by RHEL image builder. When using RHEL image builder customized with
the xccdf_org.ssgproject.content_profile_stig profile remediation, the system fails to boot with the
following error:
Warning: /boot//.vmlinuz-<kernel version>.x86_64.hmac does not exist
FATAL: FIPS integrity test failed
Refusing to continue
CHAPTER 11. KNOWN ISSUES
173
Enabling the FIPS policy manually after the system image installation with the fips-mode-setup --
enable command does not work, because the /boot directory is on a different partition. System boots
successfully if FIPS is disabled. Currently, there is no workaround available.
NOTE
You can manually enable FIPS after installing the image by using the fips-mode-setup --
enable command.
Jira:RHEL-4649
Driver disk menu fails to display user inputs on the console
When you start RHEL installation using the inst.dd option on the kernel command line with a driver disk,
the console fails to display the user input. Consequently, it appears that the application does not
respond to the user input and stops responding, but displays the output which is confusing for users.
However, this behavior does not affect the functionality, and user input gets registered after pressing
Enter.
As a workaround, to see the expected results, ignore the absence of user inputs in the console and
press Enter when you finish adding inputs.
Jira:RHEL-4737
11.2. SECURITY
OpenSSL does not detect if a PKCS #11 token supports the creation of raw RSA or RSA-
PSS signatures
The TLS 1.3 protocol requires support for RSA-PSS signatures. If a PKCS #11 token does not support raw
RSA or RSA-PSS signatures, server applications that use the OpenSSL library fail to work with an RSA
key if the key is held by the PKCS #11 token. As a result, TLS communication fails in the described
scenario.
To work around this problem, configure servers and clients to use TLS version 1.2 as the highest TLS
protocol version available.
Bugzilla:1681178
[1]
OpenSSL incorrectly handles PKCS #11 tokens that does not support raw RSA or RSA-PSS
signatures
The OpenSSL library does not detect key-related capabilities of PKCS #11 tokens. Consequently,
establishing a TLS connection fails when a signature is created with a token that does not support raw
RSA or RSA-PSS signatures.
To work around the problem, add the following lines after the .include line at the end of the
crypto_policy section in the /etc/pki/tls/openssl.cnf file:
SignatureAlgorithms =
RSA+SHA256:RSA+SHA512:RSA+SHA384:ECDSA+SHA256:ECDSA+SHA512:ECDSA+SHA384
MaxProtocol = TLSv1.2
As a result, a TLS connection can be established in the described scenario.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
174
Bugzilla:1685470
[1]
With a specific syntax, scp empties files copied to themselves
The scp utility changed from the Secure copy protocol (SCP) to the more secure SSH file transfer
protocol (SFTP). Consequently, copying a file from a location to the same location erases the file
content. The problem affects the following syntax:
scp localhost:/myfile localhost:/myfile
To work around this problem, do not copy files to a destination that is the same as the source location
using this syntax.
The problem has been fixed for the following syntaxes:
scp /myfile localhost:/myfile
scp localhost:~/myfile ~/myfile
Bugzilla:2056884
The OSCAP Anaconda add-on does not fetch tailored profiles in the graphical installation
The OSCAP Anaconda add-on does not provide an option to select or deselect tailoring of security
profiles in the RHEL graphical installation. Starting from RHEL 8.8, the add-on does not take tailoring
into account by default when installing from archives or RPM packages. Consequently, the installation
displays the following error message instead of fetching an OSCAP tailored profile:
There was an unexpected problem with the supplied content.
To work around this problem, you must specify paths in the %addon org_fedora_oscap section of your
Kickstart file, for example:
xccdf-path = /usr/share/xml/scap/sc_tailoring/ds-combined.xml
tailoring-path = /usr/share/xml/scap/sc_tailoring/tailoring-xccdf.xml
As a result, you can use the graphical installation for OSCAP tailored profiles only with the
corresponding Kickstart specifications.
Jira:RHEL-1824
Ansible remediations require additional collections
With the replacement of Ansible Engine by the ansible-core package, the list of Ansible modules
provided with the RHEL subscription is reduced. As a consequence, running remediations that use
Ansible content included within the scap-security-guide package requires collections from the rhc-
worker-playbook package.
For an Ansible remediation, perform the following steps:
1. Install the required packages:
# dnf install -y ansible-core scap-security-guide rhc-worker-playbook
2. Navigate to the /usr/share/scap-security-guide/ansible directory:
CHAPTER 11. KNOWN ISSUES
175
# cd /usr/share/scap-security-guide/ansible
3. Run the relevant Ansible playbook using environment variables that define the path to the
additional Ansible collections:
# ANSIBLE_COLLECTIONS_PATH=/usr/share/rhc-worker-
playbook/ansible/collections/ansible_collections/ ansible-playbook -c local -i localhost, rhel9-
playbook-cis_server_l1.yml
Replace cis_server_l1 with the ID of the profile against which you want to remediate the
system.
As a result, the Ansible content is processed correctly.
NOTE
Support of the collections provided in rhc-worker-playbook is limited to enabling the
Ansible content sourced in scap-security-guide.
Jira:RHEL-1800
Keylime does not accept concatenated PEM certificates
When Keylime receives a certificate chain as multiple certificates in the PEM format concatenated in a
single file, the keylime-agent-rust Keylime component does not correctly use all the provided
certificates during signature verification, resulting in a TLS handshake failure. As a consequence, the
client components (keylime_verifier and keylime_tenant) cannot connect to the Keylime agent. To
work around this problem, use just one certificate instead of multiple certificates.
Jira:RHELPLAN-157225
[1]
Keylime refuses runtime policies whose digests start with a backslash
The current script for generating runtime policies, create_runtime_policy.sh, uses SHA checksum
functions, for example, sha256sum, to compute the file digest. However, when the input file name
contains a backslash or \n, the checksum function adds a backslash before the digest in its output. In
such cases, the generated policy file is malformed. When provided with the malformed policy file, the
Keylime tenant produces the following or similar error message: me.tenant - ERROR - Response code
400: Runtime policy is malformatted. To work around the problem, remove the backslash from the
malformed policy file manually by entering the following command: sed -i 's/^\\//g'
<malformed_file_name>.
Jira:RHEL-11867
[1]
Keylime agent rejects requests from the verifier after update
When the API version number of the Keylime agent (keylime-agent-rust) has been updated, the agent
rejects requests that use a different version. As a consequence, if a Keylime agent is added to a verifier
and then updated, the verifier tries to contact the agent using the old API version. The agent rejects this
request and fails the attestation. To work around this problem, update the verifier (keylime-verifier)
before updating the agent (keylime-agent-rust). As a result, when the agents are updated, the verifier
detects the API change and updates its stored data accordingly.
Jira:RHEL-1518
[1]
Red Hat Enterprise Linux 9.3 9.3 Release Notes
176
The fapolicyd utility incorrectly allows executing changed files
Correctly, the IMA hash of a file should update after any change to the file, and fapolicyd should
prevent execution of the changed file. However, this does not happen due to differences in IMA policy
setup and in file hashing by the evctml utility. As a result, the IMA hash is not updated in the extended
attribute of a changed file. Consequently, fapolicyd incorrectly allows the execution of the changed file.
Jira:RHEL-520
[1]
Default SELinux policy allows unconfined executables to make their stack executable
The default state of the selinuxuser_execstack boolean in the SELinux policy is on, which means that
unconfined executables can make their stack executable. Executables should not use this option, and it
might indicate poorly coded executables or a possible attack. However, due to compatibility with other
tools, packages, and third-party products, Red Hat cannot change the value of the boolean in the
default policy. If your scenario does not depend on such compatibility aspects, you can turn the boolean
off in your local policy by entering the command setsebool -P selinuxuser_execstack off.
Bugzilla:2064274
SSH timeout rules in STIG profiles configure incorrect options
An update of OpenSSH affected the rules in the following Defense Information Systems Agency
Security Technical Implementation Guide (DISA STIG) profiles:
DISA STIG for RHEL 9 (xccdf_org.ssgproject.content_profile_stig)
DISA STIG with GUI for RHEL 9 (xccdf_org.ssgproject.content_profile_stig_gui)
In each of these profiles, the following two rules are affected:
Title: Set SSH Client Alive Count Max to zero
CCE Identifier: CCE-90271-8
Rule ID: xccdf_org.ssgproject.content_rule_sshd_set_keepalive_0
Title: Set SSH Idle Timeout Interval
CCE Identifier: CCE-90811-1
Rule ID: xccdf_org.ssgproject.content_rule_sshd_set_idle_timeout
When applied to SSH servers, each of these rules configures an option (ClientAliveCountMax and
ClientAliveInterval) that no longer behaves as previously. As a consequence, OpenSSH no longer
disconnects idle SSH users when it reaches the timeout configured by these rules. As a workaround,
these rules have been temporarily removed from the DISA STIG for RHEL 9 and DISA STIG with GUI for
RHEL 9 profiles until a solution is developed.
Bugzilla:2038978
GnuPG incorrectly allows using SHA-1 signatures even if disallowed by crypto-policies
The GNU Privacy Guard (GnuPG) cryptographic software can create and verify signatures that use the
SHA-1 algorithm regardless of the settings defined by the system-wide cryptographic policies.
Consequently, you can use SHA-1 for cryptographic purposes in the DEFAULT cryptographic policy,
which is not consistent with the system-wide deprecation of this insecure algorithm for signatures.
To work around this problem, do not use GnuPG options that involve SHA-1. As a result, you will prevent
GnuPG from lowering the default system security by using the insecure SHA-1 signatures.
Bugzilla:2070722
CHAPTER 11. KNOWN ISSUES
177
OpenSCAP memory-consumption problems
On systems with limited memory, the OpenSCAP scanner might stop prematurely or it might not
generate the results files. To work around this problem, you can customize the scanning profile to
deselect rules that involve recursion over the entire / file system:
rpm_verify_hashes
rpm_verify_permissions
rpm_verify_ownership
file_permissions_unauthorized_world_writable
no_files_unowned_by_user
dir_perms_world_writable_system_owned
file_permissions_unauthorized_suid
file_permissions_unauthorized_sgid
file_permissions_ungroupowned
dir_perms_world_writable_sticky_bits
For more details and more workarounds, see the related Knowledgebase article.
Bugzilla:2161499
Remediating service-related rules during kickstart installations might fail
During a kickstart installation, the OpenSCAP utility sometimes incorrectly shows that a service enable
or disable state remediation is not needed. Consequently, OpenSCAP might set the services on the
installed system to a non-compliant state. As a workaround, you can scan and remediate the system
after the kickstart installation. This will fix the service-related issues.
BZ#1834716
11.3. RHEL FOR EDGE
The open-vm-tools package is not available in the edge-vsphere image
Currently, the open-vm-tools package is not installed by default in the edge-vsphere image. To
workaround this issue, include the package in the blueprint customization. When using the edge-
vsphere image type, add the open-vm-tools in the blueprint for the RHEL for Edge Container image or
the RHEL for Edge Commit image.
Jira:RHELDOCS-16574
[1]
11.4. SOFTWARE MANAGEMENT
The Installation process sometimes becomes unresponsive
When you install RHEL, the installation process sometimes becomes unresponsive. The
/tmp/packaging.log file displays the following message at the end:
Red Hat Enterprise Linux 9.3 9.3 Release Notes
178
10:20:56,416 DDEBUG dnf: RPM transaction over.
To workaround this problem, restart the installation process.
Bugzilla:2073510
Running createrepo_c on local repositories generates duplicate repodata files
When you run the createrepo_c command on local repositories, it generates duplicate copies of
repodata files, one of the copies is compressed and one is not. There is no workaround available,
however, you can safely ignore the duplicate files. The createrepo_c command generates duplicate
copies because of requirements and differences in other tools relying on repositories created by using
createrepo_c.
Bugzilla:2056318
11.5. SHELLS AND COMMAND-LINE TOOLS
ReaR fails during recovery if the TMPDIR variable is set in the configuration file
Setting and exporting TMPDIR in the /etc/rear/local.conf or /etc/rear/site.conf ReaR configuration file
does not work and is deprecated.
The ReaR default configuration file /usr/share/rear/conf/default.conf contains the following
instructions:
# To have a specific working area directory prefix for Relax-and-Recover
# specify in /etc/rear/local.conf something like
#
# export TMPDIR="/prefix/for/rear/working/directory"
#
# where /prefix/for/rear/working/directory must already exist.
# This is useful for example when there is not sufficient free space
# in /tmp or $TMPDIR for the ISO image or even the backup archive.
The instructions mentioned above do not work correctly because the TMPDIR variable has the same
value in the rescue environment, which is not correct if the directory specified in the TMPDIR variable
does not exist in the rescue image.
As a consequence, setting and exporting TMPDIR in the /etc/rear/local.conf file leads to the following
error when the rescue image is booted :
mktemp: failed to create file via template '/prefix/for/rear/working/directory/tmp.XXXXXXXXXX': No
such file or directory
cp: missing destination file operand after '/etc/rear/mappings/mac'
Try 'cp --help' for more information.
No network interface mapping is specified in /etc/rear/mappings/mac
or the following error and abort later, when running rear recover:
ERROR: Could not create build area
To work around this problem, if you want to have a custom temporary directory, specify a custom
directory for ReaR temporary files by exporting the variable in the shell environment before executing
ReaR. For example, execute the export TMPDIR=… statement and then execute the rear command in
CHAPTER 11. KNOWN ISSUES
179
the same shell session or script. As a result, the recovery is successful in the described configuration.
Jira:RHEL-24847
Renaming network interfaces using ifcfg files fails
On RHEL 9, the initscripts package is not installed by default. Consequently, renaming network
interfaces using ifcfg files fails. To solve this problem, Red Hat recommends that you use udev rules or
link files to rename interfaces. For further details, see Consistent network interface device naming and
the systemd.link(5) man page.
If you cannot use one of the recommended solutions, install the initscripts package.
Bugzilla:2018112
[1]
The chkconfig package is not installed by default in RHEL 9
The chkconfig package, which updates and queries runlevel information for system services, is not
installed by default in RHEL 9.
To manage services, use the systemctl commands or install the chkconfig package manually.
For more information about systemd, see Introduction to systemd. For instructions on how to use the
systemctl utility, see Managing system services with systemctl.
Bugzilla:2053598
[1]
Setting the console keymap requires the libxkbcommon library on your minimal install
In RHEL 9, certain systemd library dependencies have been converted from dynamic linking to dynamic
loading, so that your system opens and uses the libraries at runtime when they are available. With this
change, a functionality that depends on such libraries is not available unless you install the necessary
library. This also affects setting the keyboard layout on systems with a minimal install. As a result, the
localectl --no-convert set-x11-keymap gb command fails.
To work around this problem, install the libxkbcommon library:
# dnf install libxkbcommon
Jira:RHEL-6105
The %vmeff metric from the sysstat package displays incorrect values
The sysstat package provides the %vmeff metric to measure the page reclaim efficiency. The values of
the %vmeff column returned by the sar -B command are incorrect because sysstat does not parse all
relevant /proc/vmstat values provided by later kernel versions. To work around this problem, you can
calculate the %vmeff value manually from the /proc/vmstat file. For details, see Why the sar(1) tool
reports %vmeff values beyond 100 % in RHEL 8 and RHEL 9?
Jira:RHEL-12009
The Service Location Protocol (SLP) is vulnerable to an attack through UDP
The OpenSLP provides a dynamic configuration mechanism for applications in local area networks, such
as printers and file servers. However, SLP is vulnerable to a reflective denial of service amplification
attack through UDP on systems connected to the internet. SLP allows an unauthenticated attacker to
Red Hat Enterprise Linux 9.3 9.3 Release Notes
180
register new services without limits set by the SLP implementation. By using UDP and spoofing the
source address, an attacker can request the service list, creating a Denial of Service on the spoofed
address.
To prevent external attackers from accessing the SLP service, disable SLP on all systems running on
untrusted networks, such as those directly connected to the internet. Alternatively, to work around this
problem, configure firewalls to block or filter traffic on UDP and TCP port 427.
Jira:RHEL-6995
[1]
11.6. INFRASTRUCTURE SERVICES
Both bind and unbound disable validation of SHA-1-based signatures
The bind and unbound components disable validation support of all RSA/SHA1 (algorithm number 5)
and RSASHA1-NSEC3-SHA1 (algorithm number 7) signatures, and the SHA-1 usage for signatures is
restricted in the DEFAULT system-wide cryptographic policy.
As a result, certain DNSSEC records signed with the SHA-1, RSA/SHA1, and RSASHA1-NSEC3-SHA1
digest algorithms fail to verify in Red Hat Enterprise Linux 9 and the affected domain names become
vulnerable.
To work around this problem, upgrade to a different signature algorithm, such as RSA/SHA-256 or
elliptic curve keys.
For more information and a list of top-level domains that are affected and vulnerable, see the DNSSEC
records signed with RSASHA1 fail to verify solution.
Bugzilla:2070495
named fails to start if the same writable zone file is used in multiple zones
BIND does not allow the same writable zone file in multiple zones. Consequently, if a configuration
includes multiple zones which share a path to a file that can be modified by the named service, named
fails to start. To work around this problem, use the in-view clause to share one zone between multiple
views and make sure to use different paths for different zones. For example, include the view names in
the path.
Note that writable zone files are typically used in zones with allowed dynamic updates, secondary zones,
or zones maintained by DNSSEC.
Bugzilla:1984982
libotr is not compliant with FIPS
The libotr library and toolkit for off-the-record (OTR) messaging provides end-to-end encryption for
instant messaging conversations. However, the libotr library does not conform to the Federal
Information Processing Standards (FIPS) due to its use of the gcry_pk_sign() and gcry_pk_verify()
functions. As a result, you cannot use the libotr library in FIPS mode.
Bugzilla:2086562
11.7. NETWORKING
Using the XDP multi buffer mode with the mlx5 driver and a MTU greater than 3498 bytes
requires disabling RX Striding RQ
CHAPTER 11. KNOWN ISSUES
181
Running an eXpress Data Path (XDP) script with multi buffer mode on a host that matches all of the
following conditions fails:
The host uses the mlx5 driver.
The Maximum Transmission Unit (MTU) value is greater than 3498 bytes.
The receive striding receive queue (RX Striding RQ) feature is enabled on the Mellanox
interface.
If all conditions apply, the script fails with a link set xdp fd failed error. To run the XDP script on a host
with a higher MTU, disable RX Striding RQ on the Mellanox interface:
# ethtool --set-priv-flags <interface_name> rx_striding_rq off
As a result, you can use the XDP multi buffer mode on interfaces that use the mlx5 driver and have an
MTU value greater than 3498 bytes.
Jira:RHEL-6496
[1]
kTLS does not support offloading of TLS 1.3 to NICs
Kernel Transport Layer Security (kTLS) does not support offloading of TLS 1.3 to NICs. Consequently,
software encryption is used with TLS 1.3 even when the NICs support TLS offload. To work around this
problem, disable TLS 1.3 if offload is required. As a result, you can offload only TLS 1.2. When TLS 1.3 is in
use, there is lower performance, since TLS 1.3 cannot be offloaded.
Bugzilla:2000616
[1]
Failure to update the session key causes the connection to break
Kernel Transport Layer Security (kTLS) protocol does not support updating the session key, which is
used by the symmetric cipher. Consequently, the user cannot update the key, which causes a connection
break. To work around this problem, disable kTLS. As a result, with the workaround, it is possible to
successfully update the session key.
Bugzilla:2013650
[1]
The initscripts package is not installed by default
By default, the initscripts package is not installed. As a consequence, the ifup and ifdown utilities are
not available. As an alternative, use the nmcli connection up and nmcli connection down commands
to enable and disable connections. If the suggested alternative does not work for you, report the
problem and install the NetworkManager-initscripts-updown package, which provides a
NetworkManager solution for the ifup and ifdown utilities.
Bugzilla:2082303
The mlx5 driver fails while using the Mellanox ConnectX-5 adapter
In Ethernet switch device driver model (switchdev) mode, the mlx5 driver fails when configured with
the device managed flow steering (DMFS) parameter and ConnectX-5 adapter supported hardware. As
a consequence, you can see the following error message:
BUG: Bad page cache in process umount pfn:142b4b
To work around this problem, use the software managed flow steering (SMFS) parameter instead of
Red Hat Enterprise Linux 9.3 9.3 Release Notes
182
To work around this problem, use the software managed flow steering (SMFS) parameter instead of
DMFS.
Jira:RHEL-9897
[1]
The Intel® i40e adapter permanently fails on IBM Power10
When the i40e adapter encounters an I/O error on IBM Power10 systems, the Enhanced I/O Error
Handling (EEH) kernel services trigger the network driver’s reset and recovery. However, EEH
repeatedly reports I/O errors until the i40e driver reaches the predefined maximum of EEH freezes. As a
consequence, EEH causes the device to fail permanently.
Jira:RHEL-15404
[1]
The xdp-loader features command fails
The xdp-loader utility was compiled against a previous version of libbpf. As a consequence, the xdp-
loader features command fails with an error:
Cannot display features, because xdp-loader was compiled against an old version of libbpf without
support for querying features.
No workaround is available. As a result, you cannot use the xdp-loader features command to display
interface features.
Jira:RHEL-3382
[1]
11.8. KERNEL
The kdump mechanism in kernel causes OOM errors on the 64K kernel
The 64K kernel page size on the 64-bit ARM architecture uses more memory than the 4KB kernel.
Consequently, kdump causes a kernel panic and memory allocation fails with out of memory (OOM)
errors. As a work around, manually configure the crashkernel value to 640 MB. For example, set the
crashkernel= parameter as crashkernel=2G- :640M.
As a result, the kdump mechanism does not fail on the 64K kernel in the described scenario.
Bugzilla:2160676
[1]
Customer applications with dependencies on kernel page size might need updating when
moving from 4k to 64k page size kernel
RHEL is compatible with both 4k and 64k page size kernels. Customer applications with dependencies
on a 4k kernel page size might require updating when moving from 4k to 64k page size kernels. Known
instances of this include jemalloc and dependent applications.
The jemalloc memory allocator library is sensitive to the page size used in the system’s runtime
environment. The library can be built to be compatible with 4k and 64k page size kernels, for example,
when configured with --with-lg-page=16 or env JEMALLOC_SYS_WITH_LG_PAGE=16 (for
jemallocator Rust crate). Consequently, a mismatch can occur between the page size of the runtime
environment and the page size that was present when compiling binaries that depend on jemalloc. As a
result, using a jemalloc-based application triggers the following error:
<jemalloc>: Unsupported system page size
CHAPTER 11. KNOWN ISSUES
183
To avoid this problem, use one of the following approaches:
Use the appropriate build configuration or environment options to create 4k and 64k page size
compatible binaries.
Build any user space packages that use jemalloc after booting into the final 64k kernel and
runtime environment.
For example, you can build the fd-find tool, which also uses jemalloc, with the cargo Rust package
manager. In the final 64k environment, trigger a new build of all dependencies to resolve the mismatch in
the page size by entering the cargo command:
# cargo install fd-find --force
Bugzilla:2167783
[1]
Upgrading to the latest real-time kernel with dnf does not install multiple kernel versions in
parallel
Installing the latest real-time kernel with the dnf package manager requires resolving package
dependencies to retain the new and current kernel versions simultaneously. By default, dnf removes the
older kernel-rt package during the upgrade.
As a workaround, add the current kernel-rt package to the installonlypkgs option in the /etc/yum.conf
configuration file, for example, installonlypkgs=kernel-rt.
The installonlypkgs option appends kernel-rt to the default list used by dnf. Packages listed in
installonlypkgs directive are not removed automatically and therefore support multiple kernel versions
to install simultaneously.
Note that having multiple kernels installed is a way to have a fallback option when working with a new
kernel version.
Bugzilla:2181571
[1]
The Delay Accounting functionality does not display the SWAPIN and IO% statistics columns
by default
The Delayed Accounting functionality, unlike early versions, is disabled by default. Consequently, the
iotop application does not show the SWAPIN and IO% statistics columns and displays the following
warning:
CONFIG_TASK_DELAY_ACCT not enabled in kernel, cannot determine SWAPIN and IO%
The Delay Accounting functionality, using the taskstats interface, provides the delay statistics for all
tasks or threads that belong to a thread group. Delays in task execution occur when they wait for a
kernel resource to become available, for example, a task waiting for a free CPU to run on. The statistics
help in setting a task’s CPU priority, I/O priority, and rss limit values appropriately.
As a workaround, you can enable the delayacct boot option either at run time or boot.
To enable delayacct at run time, enter:
echo 1 > /proc/sys/kernel/task_delayacct
Note that this command enables the feature system wide, but only for the tasks that you start
Red Hat Enterprise Linux 9.3 9.3 Release Notes
184
Note that this command enables the feature system wide, but only for the tasks that you start
after running this command.
To enable delayacct permanently at boot, use one of the following procedures:
Edit the /etc/sysctl.conf file to override the default parameters:
a. Add the following entry to the /etc/sysctl.conf file:
kernel.task_delayacct = 1
For more information, see How to set sysctl variables on Red Hat Enterprise Linux .
b. Reboot the system for changes to take effect.
Add the delayacct option to the kernel command line.
For more information, see Configuring kernel command-line parameters.
As a result, the iotop application displays the SWAPIN and IO% statistics columns.
Bugzilla:2132480
[1]
Hardware certification of the real-time kernel on systems with large core-counts might
require passing the skew-tick=1 boot parameter
Large or moderate sized systems with numerous sockets and large core-counts can experience latency
spikes due to lock contentions on xtime_lock, which is used in the timekeeping system. As a
consequence, latency spikes and delays in hardware certifications might occur on multiprocessing
systems. As a workaround, you can offset the timer tick per CPU to start at a different time by adding
the skew_tick=1 boot parameter.
To avoid lock conflicts, enable skew_tick=1:
1. Enable the skew_tick=1 parameter with grubby.
# grubby --update-kernel=ALL --args="skew_tick=1"
2. Reboot for changes to take effect.
3. Verify the new settings by displaying the kernel parameters you pass during boot.
cat /proc/cmdline
Note that enabling skew_tick=1 causes a significant increase in power consumption and, therefore, it
must be enabled only if you are running latency sensitive real-time workloads.
Jira:RHEL-9318
[1]
The kdump mechanism fails to capture the vmcore file on LUKS-encrypted targets
When running kdump on systems with Linux Unified Key Setup (LUKS) encrypted partitions, systems
require a certain amount of available memory. When the available memory is less than the required
amount of memory, the systemd-cryptsetup service fails to mount the partition. Consequently, the
second kernel fails to capture the crash dump file on the LUKS-encrypted targets.
As a workaround, query the Recommended crashkernel value and gradually increase the memory size
CHAPTER 11. KNOWN ISSUES
185
As a workaround, query the Recommended crashkernel value and gradually increase the memory size
to an appropriate value. The Recommended crashkernel value can serve as reference to set the
required memory size.
1. Print the estimate crash kernel value.
# kdumpctl estimate
2. Configure the amount of required memory by increasing the crashkernel value.
# grubby --args=crashkernel=652M --update-kernel=ALL
3. Reboot the system for changes to take effect.
# reboot
As a result, kdump works correctly on systems with LUKS-encrypted partitions.
Jira:RHEL-11196
[1]
The kdump service fails to build the initrd file on IBM Z systems
On the 64-bit IBM Z systems, the kdump service fails to load the initial RAM disk ( initrd) when znet
related configuration information such as s390-subchannels reside in an inactive NetworkManager
connection profile. Consequently, the kdump mechanism fails with the following error:
dracut: Failed to set up znet
kdump: mkdumprd: failed to make kdump initrd
As a workaround, use one of the following solutions:
Configure a network bond or bridge by re-using the connection profile that has the znet
configuration information:
$ nmcli connection modify enc600 master bond0 slave-type bond
Copy the znet configuration information from the inactive connection profile to the active
connection profile:
a. Run the nmcli command to query the NetworkManager connection profiles:
# nmcli connection show
NAME UUID TYPE Device
bridge-br0 ed391a43-bdea-4170-b8a2 bridge br0
bridge-slave-enc600 caf7f770-1e55-4126-a2f4 ethernet enc600
enc600 bc293b8d-ef1e-45f6-bad1 ethernet --
b. Update the active profile with configuration information from the inactive connection:
#!/bin/bash
inactive_connection=enc600
active_connection=bridge-slave-enc600
Red Hat Enterprise Linux 9.3 9.3 Release Notes
186
for name in nettype subchannels options; do
field=802-3-ethernet.s390-$name
val=$(nmcli --get-values "$field"connection show "$inactive_connection")
nmcli connection modify "$active_connection" "$field" $val"
done
c. Restart the kdump service for changes to take effect:
# kdumpctl restart
Bugzilla:2064708
The iwl7260-firmware breaks Wi-Fi on Intel Wi-Fi 6 AX200, AX210, and Lenovo ThinkPad P1
Gen 4
After updating the iwl7260-firmware or iwl7260-wifi driver to the version provided by RHEL 9.1 and
later, the hardware gets into an incorrect internal state. reports its state incorrectly. Consequently, Intel
Wifi 6 cards may not work and display the error message:
kernel: iwlwifi 0000:09:00.0: Failed to start RT ucode: -110
kernel: iwlwifi 0000:09:00.0: WRT: Collecting data: ini trigger 13 fired (delay=0ms)
kernel: iwlwifi 0000:09:00.0: Failed to run INIT ucode: -110
An unconfirmed workaround is to power off the system and back on again. Do not reboot.
Bugzilla:2129288
[1]
weak-modules from kmod fails to work with module inter-dependencies
The weak-modules script provided by the kmod package determines which modules are kABI-
compatible with installed kernels. However, while checking modules' kernel compatibility, weak-
modules processes modules symbol dependencies from higher to lower release of the kernel for which
they were built. As a consequence, modules with inter-dependencies built against different kernel
releases might be interpreted as non-compatible, and therefore the weak-modules script fails to work
in this scenario.
To work around the problem, build or put the extra modules against the latest stock kernel before you
install the new kernel.
Bugzilla:2103605
[1]
dkms provides an incorrect warning on program failure with correctly compiled drivers on
64-bit ARM CPUs
The Dynamic Kernel Module Support (dkms) utility does not recognize that the kernel headers for 64-
bit ARM CPUs work for both the kernels with 4 kilobytes and 64 kilobytes page sizes. As a result, when
the kernel update is performed and the kernel-64k-devel package is not installed, dkms provides an
incorrect warning on why the program failed on correctly compiled drivers. To work around this problem,
install the kernel-headers package, which contains header files for both types of ARM CPU
architectures and is not specific to dkms and its requirements.
JIRA:RHEL-25967
[1]
11.9. FILE SYSTEMS AND STORAGE
CHAPTER 11. KNOWN ISSUES
187
Anaconda fails to login iSCSI server using the no authentication method after unsuccessful
CHAP authentication attempt
When you add iSCSI discs using CHAP authentication and the login attempt fails due to incorrect
credentials, a relogin attempt to the discs with the no authentication method fails. To workaround this
problem, close the current session and login using the no authentication method.
Bugzilla:1983602
[1]
Device Mapper Multipath is not supported with NVMe/TCP
Using Device Mapper Multipath with the nvme-tcp driver can result in the Call Trace warnings and
system instability. To work around this problem, NVMe/TCP users must enable native NVMe
multipathing and not use the device-mapper-multipath tools with NVMe.
By default, Native NVMe multipathing is enabled in RHEL 9. For more information, see Enabling
multipathing on NVMe devices.
Bugzilla:2033080
[1]
The blk-availability systemd service deactivates complex device stacks
In systemd, the default block deactivation code does not always handle complex stacks of virtual block
devices correctly. In some configurations, virtual devices might not be removed during the shutdown,
which causes error messages to be logged. To work around this problem, deactivate complex block
device stacks by executing the following command:
# systemctl enable --now blk-availability.service
As a result, complex virtual device stacks are correctly deactivated during shutdown and do not produce
error messages.
Bugzilla:2011699
[1]
Disabling quota accounting is no longer possible for an XFS filesystem mounted with
quotas enabled
Starting with RHEL 9.2, it is no longer possible to disable quota accounting on an XFS filesystem which
has been mounted with quotas enabled.
To work around this issue, disable quota accounting by remounting the filesystem, with the quota option
removed.
Bugzilla:2160619
[1]
udev rule change for NVMe devices
There is a udev rule change for NVMe devices that adds OPTIONS="string_escape=replace"
parameter. This leads to a disk by-id naming change for some vendors, if the serial number of your
device has leading whitespace.
Bugzilla:2185048
NVMe/FC devices cannot be reliably used in a Kickstart file
NVMe/FC devices can be unavailable during parsing or execution of pre-scripts of the Kickstart file,
which can cause the Kickstart installation to fail. To work around this issue, update the boot argument to
inst.wait_for_disks=30. This option causes a delay of 30 seconds, and should provide enough time for
Red Hat Enterprise Linux 9.3 9.3 Release Notes
188
the NVMe/FC device to connect. With this workaround along with the NVMe/FC devices connecting in
time, the Kickstart installation proceeds without issues.
Jira:RHEL-8164
[1]
Kernel panic while using the qedi driver
While using the qedi iSCSI driver, the kernel panics after OS boots. To work around this issue, disable
the kfence runtime memory error detector feature by adding kfence.sample_interval=0 to the kernel
boot command line.
Jira:RHEL-8466
[1]
Unable to boot ARM based system with kernel-64k page size
While installing the vdo package, a kernel with 4k page size is installed as a dependency. As a
consequence, the system boots with the 4k page size kernel even if you select 64k page size on the
Software Selection screen. To work around this issue, select Minimal Install under Base Environment
and 64k as page size under Kernel options. When the system boots for the first time, install additional
softwares using the DNF package manager.
Jira:RHEL-8354
11.10. DYNAMIC PROGRAMMING LANGUAGES, WEB AND DATABASE
SERVERS
python3.11-lxml does not provide the lxml.isoschematron submodule
The python3.11-lxml package is distributed without the lxml.isoschematron submodule because it is
not under an open source license. The submodule implements ISO Schematron support. As an
alternative, pre-ISO-Schematron validation is available in the lxml.etree.Schematron class. The
remaining content of the python3.11-lxml package is unaffected.
Bugzilla:2157708
The --ssl-fips-mode option in MySQL and MariaDB does not change FIPS mode
The --ssl-fips-mode option in MySQL and MariaDB in RHEL works differently than in upstream.
In RHEL 9, if you use --ssl-fips-mode as an argument for the mysqld or mariadbd daemon, or if you use
ssl-fips-mode in the MySQL or MariaDB server configuration files, --ssl-fips-mode does not change
FIPS mode for these database servers.
Instead:
If you set --ssl-fips-mode to ON, the mysqld or mariadbd server daemon does not start.
If you set --ssl-fips-mode to OFF on a FIPS-enabled system, the mysqld or mariadbd server
daemons still run in FIPS mode.
This is expected because FIPS mode should be enabled or disabled for the whole RHEL system, not for
specific components.
Therefore, do not use the --ssl-fips-mode option in MySQL or MariaDB in RHEL. Instead, ensure FIPS
mode is enabled on the whole RHEL system:
Preferably, install RHEL with FIPS mode enabled. Enabling FIPS mode during the installation
CHAPTER 11. KNOWN ISSUES
189
ensures that the system generates all keys with FIPS-approved algorithms and continuous
monitoring tests in place. For information about installing RHEL in FIPS mode, see Installing the
system in FIPS mode.
Alternatively, you can switch FIPS mode for the entire RHEL system by following the procedure
in Switching the system to FIPS mode .
Bugzilla:1991500
11.11. IDENTITY MANAGEMENT
MIT Kerberos does not support ECC certificates for PKINIT
MIT Kerberos does not implement the RFC5349 request for comments document, which describes the
design of elliptic-curve cryptography (ECC) support in Public Key Cryptography for initial
authentication (PKINIT). Consequently, the MIT krb5-pkinit package, used by RHEL, does not support
ECC certificates. For more information, see Elliptic Curve Cryptography (ECC) Support for Public Key
Cryptography for Initial Authentication in Kerberos (PKINIT).
Jira:RHEL-4902
The DEFAULT:SHA1 subpolicy has to be set on RHEL 9 clients for PKINIT to work against
AD KDCs
The SHA-1 digest algorithm has been deprecated in RHEL 9, and CMS messages for Public Key
Cryptography for initial authentication (PKINIT) are now signed with the stronger SHA-256 algorithm.
However, the Active Directory (AD) Kerberos Distribution Center (KDC) still uses the SHA-1 digest
algorithm to sign CMS messages. As a result, RHEL 9 Kerberos clients fail to authenticate users by using
PKINIT against an AD KDC.
To work around the problem, enable support for the SHA-1 algorithm on your RHEL 9 systems with the
following command:
# update-crypto-policies --set DEFAULT:SHA1
Bugzilla:2060798
The PKINIT authentication of a user fails if a RHEL 9 Kerberos agent communicates with a
non-RHEL-9 and non-AD Kerberos agent
If a RHEL 9 Kerberos agent, either a client or Kerberos Distribution Center (KDC), interacts with a non-
RHEL-9 Kerberos agent that is not an Active Directory (AD) agent, the PKINIT authentication of the
user fails. To work around the problem, perform one of the following actions:
Set the RHEL 9 agent’s crypto-policy to DEFAULT:SHA1 to allow the verification of SHA-1
signatures:
# update-crypto-policies --set DEFAULT:SHA1
Update the non-RHEL-9 and non-AD agent to ensure it does not sign CMS data using the
SHA-1 algorithm. For this, update your Kerberos client or KDC packages to the versions that use
SHA-256 instead of SHA-1:
CentOS 9 Stream: krb5-1.19.1-15
Red Hat Enterprise Linux 9.3 9.3 Release Notes
190
RHEL 8.7: krb5-1.18.2-17
RHEL 7.9: krb5-1.15.1-53
Fedora Rawhide/36: krb5-1.19.2-7
Fedora 35/34: krb5-1.19.2-3
As a result, the PKINIT authentication of the user works correctly.
Note that for other operating systems, it is the krb5-1.20 release that ensures that the agent signs CMS
data with SHA-256 instead of SHA-1.
See also The DEFAULT:SHA1 subpolicy has to be set on RHEL 9 clients for PKINIT to work against AD
KDCs.
Jira:RHEL-4875
FIPS support for AD trust requires the AD-SUPPORT crypto subpolicy
Active Directory (AD) uses AES SHA-1 HMAC encryption types, which are not allowed in FIPS mode on
RHEL 9 by default. If you want to use RHEL 9 IdM hosts with an AD trust, enable support for AES SHA-1
HMAC encryption types before installing IdM software.
Since FIPS compliance is a process that involves both technical and organizational agreements, consult
your FIPS auditor before enabling the AD-SUPPORT subpolicy to allow technical measures to support
AES SHA-1 HMAC encryption types, and then install RHEL IdM:
# update-crypto-policies --set FIPS:AD-SUPPORT
Bugzilla:2057471
Heimdal client fails to authenticate a user using PKINIT against RHEL 9 KDC
By default, a Heimdal Kerberos client initiates the PKINIT authentication of an IdM user by using Modular
Exponential (MODP) Diffie-Hellman Group 2 for Internet Key Exchange (IKE). However, the MIT
Kerberos Distribution Center (KDC) on RHEL 9 only supports MODP Group 14 and 16.
Consequently, the pre-autentication request fails with the krb5_get_init_creds: PREAUTH_FAILED
error on the Heimdal client and Key parameters not accepted on the RHEL MIT KDC.
To work around this problem, ensure that the Heimdal client uses MODP Group 14. Set the
pkinit_dh_min_bits parameter in the libdefaults section of the client configuration file to 1759:
[libdefaults]
pkinit_dh_min_bits = 1759
As a result, the Heimdal client completes the PKINIT pre-authentication against the RHEL MIT KDC.
Jira:RHEL-4889
IdM in FIPS mode does not support using the NTLMSSP protocol to establish a two-way
cross-forest trust
Establishing a two-way cross-forest trust between Active Directory (AD) and Identity Management
(IdM) with FIPS mode enabled fails because the New Technology LAN Manager Security Support
Provider (NTLMSSP) authentication is not FIPS-compliant. IdM in FIPS mode does not accept the RC4
CHAPTER 11. KNOWN ISSUES
191
NTLM hash that the AD domain controller uses when attempting to authenticate.
Jira:RHEL-12154
[1]
IdM Vault encryption and decryption fails in FIPS mode
The OpenSSL RSA-PKCS1v15 padding encryption is blocked if FIPS mode is enabled. Consequently,
Identity Management (IdM) Vaults fail to work correctly as IdM is currently using the PKCS1v15 padding
for wrapping the session key with the transport certificate.
Jira:RHEL-12143
[1]
Users without SIDs cannot log in to IdM after an upgrade
After upgrading your IdM replica to RHEL 9.2, the IdM Kerberos Distribution Center (KDC) might fail to
issue ticket-granting tickets (TGTs) to users who do not have Security Identifiers (SIDs) assigned to
their accounts. Consequently, the users cannot log in to their accounts.
To work around the problem, generate SIDs by running the following command as an IdM administrator
on another IdM replica in the topology:
# ipa config-mod --enable-sid --add-sids
Afterward, if users still cannot log in, examine the Directory Server error log. You might have to adjust ID
ranges to include user POSIX identities.
See the When upgrading to RHEL9, IDM users are not able to login anymore Knowledgebase solution for
more information.
Jira:RHELPLAN-157939
[1]
Migrated IdM users might be unable to log in due to mismatching domain SIDs
If you have used the ipa migrate-ds script to migrate users from one IdM deployment to another, those
users might have problems using IdM services because their previously existing Security Identifiers
(SIDs) do not have the domain SID of the current IdM environment. For example, those users can
retrieve a Kerberos ticket with the kinit utility, but they cannot log in. To work around this problem, see
the following Knowledgebase article: Migrated IdM users unable to log in due to mismatching domain
SIDs.
Jira:RHELPLAN-109613
[1]
MIT krb5 user fails to obtain an AD TGT because of incompatible encryption types
generating the user PAC
In MIT krb5 1.20 and later packages, a Privilege Attribute Certificate (PAC) is included in all Kerberos
tickets by default. The MIT Kerberos Distribution Center (KDC) selects the strongest encryption type
available to generate the KDC checksum in the PAC, which currently is the AES HMAC-SHA2
encryption types defined in RFC8009. However, Active Directory (AD) does not support this RFC.
Consequently, in an AD-MIT cross-realm setup, an MIT krb5 user fails to obtain an AD ticket-granting
ticket (TGT) because the cross-realm TGT generated by MIT KDC contains an incompatible KDC
checksum type in the PAC.
To work around the problem, set the disable_pac parameter to true for the MIT realm in the [realms]
section of the /var/kerberos/krb5kdc/kdc.conf configuration file. As a result, the MIT KDC generates
tickets without PAC, which means that AD skips the failing checksum verification and an MIT krb5 user
can obtain an AD TGT.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
192
Bugzilla:2016312
Potential risk when using the default value for ldap_id_use_start_tls option
When using ldap:// without TLS for identity lookups, it can pose a risk for an attack vector. Particularly a
man-in-the-middle (MITM) attack which could allow an attacker to impersonate a user by altering, for
example, the UID or GID of an object returned in an LDAP search.
Currently, the SSSD configuration option to enforce TLS, ldap_id_use_start_tls, defaults to false.
Ensure that your setup operates in a trusted environment and decide if it is safe to use unencrypted
communication for id_provider = ldap. Note id_provider = ad and id_provider = ipa are not affected
as they use encrypted connections protected by SASL and GSSAPI.
If it is not safe to use unencrypted communication, enforce TLS by setting the ldap_id_use_start_tls
option to true in the /etc/sssd/sssd.conf file. The default behavior is planned to be changed in a future
release of RHEL.
Jira:RHELPLAN-155168
[1]
Adding a RHEL 9 replica in FIPS mode to an IdM deployment in FIPS mode that was
initialized with RHEL 8.6 or earlier fails
The default RHEL 9 FIPS cryptographic policy aiming to comply with FIPS 140-3 does not allow the use
of the AES HMAC-SHA1 encryption types' key derivation function as defined by RFC3961, section 5.1.
This constraint is a blocker when adding a RHEL 9 Identity Management (IdM) replica in FIPS mode to a
RHEL 8 IdM environment in FIPS mode in which the first server was installed on a RHEL 8.6 system or
earlier. This is because there are no common encryption types between RHEL 9 and the previous RHEL
versions, which commonly use the AES HMAC-SHA1 encryption types but do not use the AES HMAC-
SHA2 encryption types.
You can view the encryption type of your IdM master key by entering the following command on the
server:
# kadmin.local getprinc K/M | grep -E '^Key:'
To work around the problem, enable the use of AES HMAC-SHA1 on the RHEL 9 replica:
update-crypto-policies --set FIPS:AD-SUPPORT
WARNING
This workaround might violate FIPS compliance.
As a result, adding the RHEL 9 replica to the IdM deployment proceeds correctly.
Note that there is ongoing work to provide a procedure to generate missing AES HMAC-SHA2-
encrypted Kerberos keys on RHEL 7 and RHEL 8 servers. This will achieve FIPS 140-3 compliance on the
RHEL 9 replica. However, this process will not be fully automated, because the design of Kerberos key
cryptography makes it impossible to convert existing keys to different encryption types. The only way is
to ask users to renew their passwords.
Jira:RHEL-4888
SSSD registers the DNS names properly
Previously, if the DNS was set up incorrectly, SSSD always failed the first attempt to register the DNS
CHAPTER 11. KNOWN ISSUES
193
name. To work around the problem, this update provides a new parameter
dns_resolver_use_search_list. Set dns_resolver_use_search_list = false to avoid using the DNS
search list.
Bugzilla:1608496
[1]
Installing a RHEL 7 IdM client with a RHEL 9.2+ IdM server in FIPS mode fails due to EMS
enforcement
The TLS Extended Master Secret (EMS) extension (RFC 7627) is now mandatory for TLS 1.2
connections on FIPS-enabled RHEL 9.2 and later systems. This is in accordance with FIPS-140-3
requirements. However, the openssl version available in RHEL 7.9 and lower does not support EMS. In
consequence, installing a RHEL 7 Identity Management (IdM) client with a FIPS-enabled IdM server
running on RHEL 9.2 and later fails.
If upgrading the host to RHEL 8 before installing an IdM client on it is not an option, work around the
problem by removing the requirement for EMS usage on the RHEL 9 server by applying a NO-
ENFORCE-EMS subpolicy on top of the FIPS crypto policy:
# update-crypto-policies --set FIPS:NO-ENFORCE-EMS
Note that this removal goes against the FIPS 140-3 requirements. As a result, you can establish and
accept TLS 1.2 connections that do not use EMS, and the installation of a RHEL 7 IdM client succeeds.
Jira:RHEL-4955
When the nsslapd-numlisteners attribute value is more than 2, Directory Server fails
If the nsslapd-numlisteners attribute value is higher than 2, Directory Server might close the listening
file descriptor instead of the accepted file descriptor. As a result, after some time, Directory Server
stops listening on some ports and fails.
To work around the problem, set the nsslapd-numlisteners attribute value to 1.
Jira:RHEL-17178
[1]
11.12. DESKTOP
VNC is not running after upgrading to RHEL 9
After upgrading from RHEL 8 to RHEL 9, the VNC server fails to start, even if it was previously enabled.
To work around the problem, manually enable the vncserver service after the system upgrade:
# systemctl enable --now vncserver@:port-number
As a result, VNC is now enabled and starts after every system boot as expected.
Bugzilla:2060308
User Creation screen is unresponsive
When installing RHEL using a graphical user interface, the User Creation screen is unresponsive. As a
consequence, creating users during installation is more difficult.
To work around this problem, use one of the following solutions to create users:
Red Hat Enterprise Linux 9.3 9.3 Release Notes
194
Run the installation in VNC mode and resize the VNC window.
Create users after completing the installation process.
Jira:RHEL-11924
[1]
WebKitGTK fails to display web pages on IBM Z
The WebKitGTK web browser engine fails when trying to display web pages on the IBM Z architecture.
The web page remains blank and the WebKitGTK process ends unexpectedly.
As a consequence, you cannot use certain features of applications that use WebKitGTK to display web
pages, such as the following:
The Evolution mail client
The GNOME Online Accounts settings
The GNOME Help application
Jira:RHEL-4157
11.13. GRAPHICS INFRASTRUCTURES
NVIDIA drivers might revert to X.org
Under certain conditions, the proprietary NVIDIA drivers disable the Wayland display protocol and revert
to the X.org display server:
If the version of the NVIDIA driver is lower than 470.
If the system is a laptop that uses hybrid graphics.
If you have not enabled the required NVIDIA driver options.
Additionally, Wayland is enabled but the desktop session uses X.org by default if the version of the
NVIDIA driver is lower than 510.
Jira:RHELPLAN-119001
[1]
Night Light is not available on Wayland with NVIDIA
When the proprietary NVIDIA drivers are enabled on your system, the Night Light feature of GNOME is
not available in Wayland sessions. The NVIDIA drivers do not currently support Night Light.
Jira:RHELPLAN-119852
[1]
X.org configuration utilities do not work under Wayland
X.org utilities for manipulating the screen do not work in the Wayland session. Notably, the xrandr utility
does not work under Wayland due to its different approach to handling, resolutions, rotations, and
layout.
Jira:RHELPLAN-121049
[1]
11.14. RED HAT ENTERPRISE LINUX SYSTEM ROLES
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195
If firewalld.service is masked, using the firewall RHEL system role fails
If firewalld.service is masked on a RHEL system, the firewall RHEL system role fails. To work around
this problem, unmask the firewalld.service:
systemctl unmask firewalld.service
Bugzilla:2123859
Unable to register systems with environment names
The rhc system role fails to register the system when specifying environment names in
rhc_environment. As a workaround, use environment IDs instead of environment names while
registering.
Jira:RHEL-1172
11.15. VIRTUALIZATION
Installing a virtual machine over https or ssh in some cases fails
Currently, the virt-install utility fails when attempting to install a guest operating system (OS) from an
ISO source over a https or ssh connection - for example using virt-install --cdrom
https://example/path/to/image.iso. Instead of creating a virtual machine (VM), the described operation
ends unexpectedly with an internal error: process exited while connecting to monitor message.
Similarly, using the RHEL 9 web console to install a guest operating system fails and displays an
Unknown driver 'https' error if you use an https or ssh URL, or the Download OS function.
To work around this problem, install qemu-kvm-block-curl and qemu-kvm-block-ssh on the host to
enable https and ssh protocol support. Alternatively, use a different connection protocol or a different
installation source.
Bugzilla:2014229
Using NVIDIA drivers in virtual machines disables Wayland
Currently, NVIDIA drivers are not compatible with the Wayland graphical session. As a consequence,
RHEL guest operating systems that use NVIDIA drivers automatically disable Wayland and load an Xorg
session instead. This primarily occurs in the following scenarios:
When you pass through an NVIDIA GPU device to a RHEL virtual machine (VM)
When you assign an NVIDIA vGPU mediated device to a RHEL VM
Jira:RHELPLAN-117234
[1]
The Milan VM CPU type is sometimes not available on AMD Milan systems
On certain AMD Milan systems, the Enhanced REP MOVSB (erms) and Fast Short REP MOVSB ( fsrm)
feature flags are disabled in the BIOS by default. Consequently, the Milan CPU type might not be
available on these systems. In addition, VM live migration between Milan hosts with different feature flag
settings might fail. To work around these problems, manually turn on erms and fsrm in the BIOS of your
host.
Bugzilla:2077767
[1]
Red Hat Enterprise Linux 9.3 9.3 Release Notes
196
A hostdev interface with failover settings cannot be hot-plugged after being hot-
unplugged
After removing a hostdev network interface with failover configuration from a running virtual machine
(VM), the interface currently cannot be re-attached to the same running VM.
Jira:RHEL-7337
Live post-copy migration of VMs with failover VFs fails
Currently, attempting to post-copy migrate a running virtual machine (VM) fails if the VM uses a device
with the virtual function (VF) failover capability enabled. To work around the problem, use the standard
migration type, rather than post-copy migration.
Jira:RHEL-7335
Host network cannot ping VMs with VFs during live migration
When live migrating a virtual machine (VM) with a configured virtual function (VF), such as a VMs that
uses virtual SR-IOV software, the network of the VM is not visible to other devices and the VM cannot
be reached by commands such as ping. After the migration is finished, however, the problem no longer
occurs.
Jira:RHEL-7336
Disabling AVX causes VMs to become unbootable
On a host machine that uses a CPU with Advanced Vector Extensions (AVX) support, attempting to
boot a VM with AVX explicitly disabled currently fails, and instead triggers a kernel panic in the VM.
Bugzilla:2005173
[1]
Windows VM fails to get IP address after network interface reset
Sometimes, Windows virtual machines fail to get an IP address after an automatic network interface
reset. As a consequence, the VM fails to connect to the network. To work around this problem, disable
and re-enable the network adapter driver in the Windows Device Manager.
Jira:RHEL-11366
Windows Server 2016 VMs sometimes stops working after hot-plugging a vCPU
Currently, assigning a vCPU to a running virtual machine (VM) with a Windows Server 2016 guest
operating system might cause a variety of problems, such as the VM terminating unexpectedly,
becoming unresponsive, or rebooting.
Bugzilla:1915715
Using a large number of queues might cause VMs to fail
Virtual machines (VMs) might fail when the virtual Trusted Platform Module (vTPM) device is enabled
and the multi-queue virtio-net feature is configured to use more than 250 queues.
This problem is caused by a limitation in the vTPM device. The vTPM device has a hard-coded limit on
the maximum number of opened file descriptors. Since multiple file descriptors are opened for every
new queue, the internal vTPM limit can be exceeded, causing the VM to fail.
To work around this problem, choose one of the following two options:
CHAPTER 11. KNOWN ISSUES
197
Keep the vTPM device enabled, but use less than 250 queues.
Disable the vTPM device to use more than 250 queues.
Jira:RHEL-13335
[1]
Redundant error messages on VMs with NVIDIA passthrough devices
When using an Intel host machine with a RHEL 9.2 and later operating system, virtual machines (VMs)
with a passed through NVDIA GPU device frequently log the following error message:
Spurious APIC interrupt (vector 0xFF) on CPU#2, should never happen.
However, this error message does not impact the functionality of the VM and can be ignored. For
details, see the Red Hat KnoweldgeBase .
Bugzilla:2149989
[1]
Some Windows guests fail to boot after a v2v conversion on hosts with AMD EPYC CPUs
After using the virt-v2v utility to convert a virtual machine (VM) that uses Windows 11 or a Windows
Server 2022 as the guest OS, the VM currently fails to boot. This occurs on hosts that use AMD EPYC
series CPUs.
Bugzilla:2168082
[1]
Restarting the OVS service on a host might block network connectivity on its running VMs
When the Open vSwitch (OVS) service restarts or crashes on a host, virtual machines (VMs) that are
running on this host cannot recover the state of the networking device. As a consequence, VMs might be
completely unable to receive packets.
This problem only affects systems that use the packed virtqueue format in their virtio networking stack.
To work around this problem, use the packed=off parameter in the virtio networking device definition
to disable packed virtqueue. With packed virtqueue disabled, the state of the networking device can, in
some situations, be recovered from RAM.
Jira:RHEL-333
Recovering an interrupted post-copy VM migration might fail
If a post-copy migration of a virtual machine (VM) is interrupted and then immediately resumed on the
same incoming port, the migration might fail with the following error: Address already in use
To work around this problem, wait at least 10 seconds before resuming the post-copy migration or
switch to another port for migration recovery.
Jira:RHEL-7096
NUMA node mapping not working correctly on AMD EPYC CPUs
QEMU does not handle NUMA node mapping on AMD EPYC CPUs correctly. As a result, the
performance of virtual machines (VMs) with these CPUs might be negatively impacted if using a NUMA
node configuration. In addition, the VMs display a warning similar to the following during boot.
sched: CPU #4's llc-sibling CPU #3 is not on the same node! [node: 1 != 0]. Ignoring dependency.
WARNING: CPU: 4 PID: 0 at arch/x86/kernel/smpboot.c:415 topology_sane.isra.0+0x6b/0x80
Red Hat Enterprise Linux 9.3 9.3 Release Notes
198
To work around this issue, do not use AMD EPYC CPUs for NUMA node configurations.
Bugzilla:2176010
NFS failure during VM migration causes migration failure and source VM coredump
Currently, if the NFS service or server is shut down during virtual machine (VM) migration, the source
VM’s QEMU is unable to reconnect to the NFS server when it starts running again. As a result, the
migration fails and a coredump is initiated on the source VM. Currently, there is no workaround available.
Bugzilla:2058982
PCIe ATS devices do not work on Windows VMs
When you configure a PCIe Address Translation Services (ATS) device in the XML configuration of
virtual machine (VM) with a Windows guest operating system, the guest does not enable the ATS device
after booting the VM. This is because Windows currently does not support ATS on virtio devices.
For more information, see the Red Hat KnowledgeBase .
Bugzilla:2073872
virsh blkiotune --weight command fails to set the correct cgroup I/O controller value
Currently, using the virsh blkiotune --weight command to set the VM weight does not work as
expected. The command fails to set the correct io.bfq.weight value in the cgroup I/O controller
interface file. There is no workaround at this time.
Bugzilla:1970830
Starting a VM with an NVIDIA A16 GPU sometimes causes the host GPU to stop working
Currently, if you start a VM that uses an NVIDIA A16 GPU passthrough device, the NVIDIA A16 GPU
physical device on the host system in some cases stops working.
To work around the problem, reboot the hypervisor and set the reset_method for the GPU device to
bus:
# echo bus > /sys/bus/pci/devices/<DEVICE-PCI-ADDRESS>/reset_method
# cat /sys/bus/pci/devices/<DEVICE-PCI-ADDRESS>/reset_method
bus
For details, see the Red Hat Knowledgebase .
Jira:RHEL-7212
[1]
RT VMs with a FIFO scheduler cannot boot
Currently, after setting a real-time (RT) virtual machine (VM) to use the fifo setting for the vCPU
scheduler, the VM becomes unresponsive when you attempt to boot it. Instead, the VM displays the
Guest has not initialized the display (yet) error.
Jira:RHEL-2815
[1]
Windows VMs might become unresponsive due to storage errors
On virtual machines (VMs) that use Windows guest operating systems, the system in some cases
CHAPTER 11. KNOWN ISSUES
199
On virtual machines (VMs) that use Windows guest operating systems, the system in some cases
becomes unresponsive when under high I/O load. When this happens, the system logs a viostor Reset
to device, \Device\RaidPort3, was issued error.
Jira:RHEL-1609
[1]
Windows 10 VMs with certain PCI devices might become unresponsive on boot
Currently, a virtual machine (VM) that uses a Windows 10 guest operating system might become
unresponsive during boot if a virtio-win-scsi PCI device with a local disk back end is attached to the
VM. To work around the problem, boot the VM with the multi_queue option enabled.
Jira:RHEL-1084
[1]
The repair function of virtio-win-guest-tool for the virtio-win drivers does not work
Currently, when using the Repair button of virtio-win-guest-tool for a virtio-win driver, such as the
Virtio Balloon Driver, the button has no effect. As a consequence, the driver cannot be reinstalled after
being removed on the guest.
Jira:RHEL-1517
[1]
Windows 11 VMs with a memory balloon device set might close unexpectedly during reboot
Currently, rebooting virtual machines (VMs) that use a Windows 11 guest operating system and a
memory balloon device in some cases fails with a DRIVER POWER STAT FAILURE blue-screen error.
Jira:RHEL-935
[1]
Migrating a Windows 11 or Windows Server 2022 VM under high network load sometimes
fails
When live-migrating a virtual machine (VM) that uses Windows Server 2022 or Windows 11 as the guest
operating system, the migration might become unresponsive or terminate unexpectedly if the network
is impacted by high packed loss.
Jira:RHEL-2316
[1]
Resuming a postcopy VM migration fails in some cases
Currently, when performing a postcopy migration of a virtual machine (VM), if a proxy network failure
occurs during the RECOVER phase of the migration, the VM becomes unresponsive and the migration
cannot be resumed. Instead, the recovery command displays the following error:
error: Requested operation is not valid: QEMU reports migration is still running
Jira:RHEL-7115
The virtio balloon driver sometimes does not work on Windows 10 VMs
Under certain circumstances, the virtio-balloon driver does not work correctly on virtual machines (VMs)
that use a Windows 10 guest operating system. As a consequence, such VMs might not use their
assigned memory efficiently.
Jira:RHEL-12118
The virtio file system has suboptimal performance in Windows VMs
Red Hat Enterprise Linux 9.3 9.3 Release Notes
200
Currently, when a virtio file system (virtiofs) is configured on a virtual machine (VM) that uses a Windows
guest operating system, the performance of virtiofs in the VM is significantly worse than in VMs that use
Linux guests.
Jira:RHEL-1212
[1]
Hot-unplugging a storage device on Windows VMs might fail
On virtual machines (VMs) that use a Windows guest operating system, removing a storage device when
the VM is running (also known as a device hot-unplug) in some cases fails. As a consequence, the
storage device remains attached to the VM and the disk manager service might become unresponsive.
Jira:RHEL-869
Hot plugging CPUs to a Windows VM might cause a system failure
When hot plugging the maximum number of CPUs to a Windows virtual machine (VM) with huge pages
enabled, the guest operating system might crash with the following Stop error:
PROCESSOR_START_TIMEOUT
Jira:RHEL-1220
Updating virtio drivers on Windows VMs might fail
When updating the KVM paravirtualized (virtio) drivers on a Windows virtual machine (VM), the update
might cause the mouse to stop working and the newly installed drivers might not be signed. This problem
occurs when updating the virtio drivers by installing from the virtio-win-guest-tools package, which is a
part of the virtio-win.iso file.
To work around this problem, update the virtio drivers by using Windows Device Manager.
Jira:RHEL-574
[1]
Kdump fails on virtual machines with AMD SEV-SNP
Currently, kdump fails on RHEL 9 virtual machines (VMs) that use the AMD Secure Encrypted
Virtualization (SEV) with the Secure Nested Paging (SNP) feature.
Jira:RHEL-10019
[1]
11.16. RHEL IN CLOUD ENVIRONMENTS
Cloning or restoring RHEL 9 virtual machines that use LVM on Nutanix AHV causes non-
root partitions to disappear
When running a RHEL 9 guest operating system on a virtual machine (VM) hosted on the Nutanix AHV
hypervisor, restoring the VM from a snapshot or cloning the VM currently causes non-root partitions in
the VM to disappear if the guest is using Logical Volume Management (LVM). As a consequence, the
following problems occur:
After restoring the VM from a snapshot, the VM cannot boot, and instead enters emergency
mode.
A VM created by cloning cannot boot, and instead enters emergency mode.
To work around these problems, do the following in emergency mode of the VM:
CHAPTER 11. KNOWN ISSUES
201
1. Remove the LVM system devices file: rm /etc/lvm/devices/system.devices
2. Re-create LVM device settings: vgimportdevices -a
3. Reboot the VM
This makes it possible for the cloned or restored VM to boot up correctly.
Alternatively, to prevent the issue from occurring, do the following before cloning a VM or creating a VM
snapshot:
1. Uncomment the use_devicesfile = 0 line in the /etc/lvm/lvm.conf file
2. Reboot the VM
Bugzilla:2059545
[1]
Customizing RHEL 9 guests on ESXi sometimes causes networking problems
Currently, customizing a RHEL 9 guest operating system in the VMware ESXi hypervisor does not work
correctly with NetworkManager key files. As a consequence, if the guest is using such a key file, it will
have incorrect network settings, such as the IP address or the gateway.
For details and workaround instructions, see the VMware Knowledge Base.
Bugzilla:2037657
[1]
RHEL instances on Azure fail to boot if provisioned by cloud-init and configured with an
NFSv3 mount entry
Currently, booting a RHEL virtual machine (VM) on the Microsoft Azure cloud platform fails if the VM
was provisioned by the cloud-init tool and the guest operating system of the VM has an NFSv3 mount
entry in the /etc/fstab file.
Bugzilla:2081114
[1]
Setting static IP in a RHEL virtual machine on a VMware host does not work
Currently, when using RHEL as a guest operating system of a virtual machine (VM) on a VMware host,
the DatasourceOVF function does not work correctly. As a consequence, if you use the cloud-init utility
to set the VM’s network to static IP and then reboot the VM, the VM’s network will be changed to
DHCP.
To work around this issue, see the VMware Knowledge Base.
Jira:RHEL-12122
Large VMs might fail to boot into the debug kernel when the kmemleak option is enabled
When attempting to boot a RHEL 9 virtual machine (VM) into the debug kernel, the booting might fail
with the following error if the machine kernel is using the kmemleak=on argument.
Cannot open access to console, the root account is locked.
See sulogin(8) man page for more details.
Press Enter to continue.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
202
This problem affects mainly large VMs because they spend more time in the boot sequence.
To work around the problem, edit the /etc/fstab file on the machine and add extra timeout options to
the /boot and /boot/efi mount points. For example:
UUID=e43ead51-b364-419e-92fc-b1f363f19e49 /boot xfs defaults,x-systemd.device-timeout=600,x-
systemd.mount-timeout=600 0 0
UUID=7B77-95E7 /boot/efi vfat defaults,uid=0,gid=0,umask=077,shortname=winnt,x-systemd.device-
timeout=600,x-systemd.mount-timeout=600 0 2
Jira:RHELDOCS-16979
[1]
11.17. SUPPORTABILITY
Timeout when running sos report on IBM Power Systems, Little Endian
When running the sos report command on IBM Power Systems, Little Endian with hundreds or
thousands of CPUs, the processor plugin reaches its default timeout of 300 seconds when collecting
huge content of the /sys/devices/system/cpu directory. As a workaround, increase the plugin’s timeout
accordingly:
For one-time setting, run:
# sos report -k processor.timeout=1800
For a permanent change, edit the [plugin_options] section of the /etc/sos/sos.conf file:
[plugin_options]
# Specify any plugin options and their values here. These options take the form
# plugin_name.option_name = value
#rpm.rpmva = off
processor.timeout = 1800
The example value is set to 1800. The particular timeout value highly depends on a specific system. To
set the plugin’s timeout appropriately, you can first estimate the time needed to collect the one plugin
with no timeout by running the following command:
# time sos report -o processor -k processor.timeout=0 --batch --build
Bugzilla:1869561
[1]
11.18. CONTAINERS
Running systemd within an older container image does not work
Running systemd within an older container image, for example, centos:7, does not work:
$ podman run --rm -ti centos:7 /usr/lib/systemd/systemd
Storing signatures
Failed to mount cgroup at /sys/fs/cgroup/systemd: Operation not permitted
[!!!!!!] Failed to mount API filesystems, freezing.
CHAPTER 11. KNOWN ISSUES
203
To work around this problem, use the following commands:
# mkdir /sys/fs/cgroup/systemd
# mount none -t cgroup -o none,name=systemd /sys/fs/cgroup/systemd
# podman run --runtime /usr/bin/crun --annotation=run.oci.systemd.force_cgroup_v1=/sys/fs/cgroup -
-rm -ti centos:7 /usr/lib/systemd/systemd
Jira:RHELPLAN-96940
[1]
Red Hat Enterprise Linux 9.3 9.3 Release Notes
204
APPENDIX A. LIST OF TICKETS BY COMPONENT
Bugzilla and JIRA tickets are listed in this document for reference. The links lead to the release notes in
this document that describe the tickets.
Component Tickets
389-ds-base Bugzilla:2188627, Bugzilla:1987471, Bugzilla:2149025, Bugzilla:2166332,
Bugzilla:2189946, Bugzilla:2189954, Bugzilla:1975930, Bugzilla:1974242,
Bugzilla:1759941, Bugzilla:2053204, Bugzilla:2116948, Bugzilla:2179278,
Bugzilla:2189717, Bugzilla:2170494, Bugzilla:2098236, Jira:RHEL-17178
NetworkManager Bugzilla:2176137, Bugzilla:2161915, Bugzilla:2151986, Bugzilla:2190375,
Bugzilla:2069001, Bugzilla:2069004, Bugzilla:2148684, Bugzilla:2158328,
Bugzilla:2180966, Bugzilla:2151040, Bugzilla:1894877
Release Notes Jira:RHELDOCS-16861, Jira:RHELDOCS-16760, Jira:RHELDOCS-
16756, Jira:RHELDOCS-16612, Jira:RHELDOCS-17102,
Jira:RHELDOCS-16979
anaconda Bugzilla:2171811, Bugzilla:2164819, Bugzilla:2177219, Bugzilla:2157921,
Bugzilla:2065754, Bugzilla:2107346, Bugzilla:2127473, Bugzilla:2050140,
Bugzilla:1877697, Jira:RHEL-4707, Jira:RHEL-4711, Bugzilla:1997832,
Jira:RHEL-4741, Bugzilla:2115783, Jira:RHEL-4762, Bugzilla:2163497,
Jira:RHEL-4737
ansible-freeipa Bugzilla:2175767, Bugzilla:2127903, Bugzilla:2127907
audit Jira:RHELPLAN-161087
bacula Jira:RHEL-6856
bind Bugzilla:1984982
cloud-init Bugzilla:2118235, Bugzilla:2172341, Jira:RHEL-12122
cockpit Bugzilla:2203361
cockpit-appstream Bugzilla:2030836
cockpit-machines Bugzilla:2173584
crash Bugzilla:2170283
createrepo_c Bugzilla:2056318
crypto-policies Bugzilla:2216257, Bugzilla:2193324, Jira:RHEL-591, Bugzilla:2225222
cups-filters Bugzilla:2229784
APPENDIX A. LIST OF TICKETS BY COMPONENT
205
cyrus-sasl Bugzilla:1995600
debugedit Bugzilla:2177302
device-mapper-multipath Jira:RHEL-782, Bugzilla:2164869, Bugzilla:2033080, Bugzilla:2011699,
Bugzilla:1926147
device-mapper-persistent-
data
Bugzilla:2175198
dnf Bugzilla:2124793, Bugzilla:2212262, Bugzilla:2073510
dnf-plugins-core Bugzilla:2157844, Bugzilla:2134638, Bugzilla:2203100
edk2 Bugzilla:1935497
elfutils Bugzilla:2182061, Bugzilla:2182059
fapolicyd Jira:RHEL-624, Jira:RHEL-622, Jira:RHEL-817, Bugzilla:2054740,
Jira:RHEL-520
fence-agents Bugzilla:2187327
fuse3 Bugzilla:2188182
gcc Bugzilla:2193180, Bugzilla:2168204, Bugzilla:2208908
gcc-toolset-13 Bugzilla:2171919
gcc-toolset-13-annobin Bugzilla:2171923
gcc-toolset-13-binutils Bugzilla:2171926
gcc-toolset-13-gcc Bugzilla:2172093
gcc-toolset-13-gdb Bugzilla:2172096
gfs2-utils Bugzilla:2170017
gimp Bugzilla:2047161
glibc Bugzilla:2169978, Bugzilla:2213907, Bugzilla:2177235
gnupg2 Bugzilla:2073567, Bugzilla:2070722
Component Tickets
Red Hat Enterprise Linux 9.3 9.3 Release Notes
206
gnutls Bugzilla:2157953, Bugzilla:2108532
golang Bugzilla:2185259, Bugzilla:2111072, Bugzilla:2092016
grafana Bugzilla:2193018, Bugzilla:2190025
grub2 Bugzilla:2184069
gssproxy Bugzilla:2181465
gtk3 Jira:RHEL-11924
httpd Bugzilla:2184403, Bugzilla:2173295
ipa Bugzilla:2196426, Bugzilla:2165880, Bugzilla:2229712, Bugzilla:2227831,
Bugzilla:2084180, Bugzilla:2084166, Bugzilla:2069202,
Bugzilla:2094673, Bugzilla:2057471, Jira:RHEL-12154, Jira:RHEL-12143,
Jira:RHEL-4955
iproute Jira:RHEL-428
java-17-openjdk Bugzilla:2186647
jmc-core Bugzilla:1980981
kdump-anaconda-addon Jira:RHEL-11196
kernel Bugzilla:1898184, Bugzilla:2177180, Bugzilla:2144528, Bugzilla:2210263,
Bugzilla:2180124, Bugzilla:2192730, Bugzilla:2178741, Bugzilla:2195986,
Bugzilla:2208365, Bugzilla:2187856, Bugzilla:2192722, Bugzilla:2171093,
Bugzilla:2189292, Bugzilla:2193330, Bugzilla:2178930, Bugzilla:2092194,
Bugzilla:2101598, Bugzilla:2218207, Bugzilla:2173947, Bugzilla:2178956,
Bugzilla:2173594, Bugzilla:1613522, Bugzilla:1874182, Bugzilla:1995338,
Bugzilla:1570255, Bugzilla:2177256, Bugzilla:2178699, Bugzilla:2023416,
Bugzilla:2021672, Bugzilla:2027304, Bugzilla:1660337, Bugzilla:1955275,
Bugzilla:2142102, Bugzilla:2068237, Bugzilla:2040643, Bugzilla:2186375,
Bugzilla:2183538, Bugzilla:2206599, Bugzilla:2167783, Bugzilla:2000616,
Bugzilla:2013650, Bugzilla:2132480, Bugzilla:2059545, Bugzilla:2005173,
Bugzilla:2128610, Bugzilla:2129288, Bugzilla:2013884, Bugzilla:2149989
kernel / Networking / IPSec Jira:RHEL-1015
kernel / Networking / NIC
Drivers
Jira:RHEL-6496, Jira:RHEL-9897, Jira:RHEL-15404
kernel / Platform Enablement
/ NVMe
Jira:RHEL-8171, Jira:RHEL-8164
Component Tickets
APPENDIX A. LIST OF TICKETS BY COMPONENT
207
kernel / Storage / Storage
Drivers
Jira:RHEL-8466
kernel / Virtualization / KVM Jira:RHEL-7212, Jira:RHEL-2815
kernel-rt Bugzilla:2181571
kernel-rt / Other Jira:RHEL-9318
kexec-tools Bugzilla:2083475, Bugzilla:2173815, Bugzilla:2169720, Bugzilla:2160676,
Bugzilla:2113873, Bugzilla:2064708
keylime Jira:RHEL-595, Jira:RHEL-11866, Jira:RHEL-392, Jira:RHEL-393,
Jira:RHEL-947, Jira:RHEL-1252, Jira:RHEL-11867, Jira:RHEL-1518
keylime-agent-rust Jira:RHEL-476, Jira:RHEL-395, Jira:RHEL-396
kmod Bugzilla:2103605
kmod-kvdo Jira:RHEL-8354
krb5 Bugzilla:2178298, Bugzilla:2155607, Jira:RHEL-4902, Bugzilla:2060798,
Jira:RHEL-4875, Jira:RHEL-4889, Bugzilla:2060421, Bugzilla:2016312,
Jira:RHEL-4888
libabigail Bugzilla:2186931
libotr Bugzilla:2086562
libpfm Bugzilla:2185652
libvirt Bugzilla:2032406, Bugzilla:2168499, Bugzilla:2014487, Bugzilla:2143158,
Bugzilla:2078693
libxcrypt Bugzilla:2034569
llvm-toolset Bugzilla:2178796
lvm2 Bugzilla:2038183
mysql Bugzilla:1991500
nfs-utils Bugzilla:2081114
nginx-1.22-module Bugzilla:2170808
Component Tickets
Red Hat Enterprise Linux 9.3 9.3 Release Notes
208
nmstate Bugzilla:2179916, Bugzilla:2180795, Bugzilla:2177733, Bugzilla:2183214,
Bugzilla:2187622
nodejs Bugzilla:2186717
nss Bugzilla:2157950
nvme-cli Bugzilla:2159929
nvme-stas Bugzilla:1893841
open-vm-tools Bugzilla:2037657
opencryptoki Bugzilla:2160061
opensc Jira:RHEL-280
openscap Bugzilla:2217442, Bugzilla:2161499
openslp Jira:RHEL-6995
openssh Bugzilla:2070163, Bugzilla:2056884
openssl Bugzilla:2216256, Bugzilla:2153471, Bugzilla:2188180, Bugzilla:2160797,
Bugzilla:2168665, Bugzilla:1975836, Bugzilla:1681178, Bugzilla:1685470
osbuild Jira:RHEL-4655
osbuild-composer Bugzilla:2173928, Jira:RHEL-7999, Jira:RHEL-4649
oscap-anaconda-addon Bugzilla:2172264, Jira:RHEL-1824
pacemaker Bugzilla:2189301, Bugzilla:2182482
papi Bugzilla:2111923, Bugzilla:2186927, Bugzilla:2215582
pause-container Bugzilla:2106816
pcp Bugzilla:2175602, Bugzilla:2185803
pcs Bugzilla:2168155, Bugzilla:2163953, Bugzilla:2175881, Bugzilla:2182810,
Bugzilla:1423473, Bugzilla:2177996, Bugzilla:1860626, Bugzilla:2163914
pcsc-lite-ccid Bugzilla:2209457
Component Tickets
APPENDIX A. LIST OF TICKETS BY COMPONENT
209
perl-HTTP-Tiny Bugzilla:2228412
pki-core Bugzilla:2084181
podman Jira:RHELPLAN-154314, Jira:RHELPLAN-154432, Jira:RHELPLAN-
154441, Jira:RHELPLAN-154438, Jira:RHELPLAN-163003,
Jira:RHELPLAN-160660, Jira:RHELPLAN-154429, Bugzilla:2069279
postfix Bugzilla:2134789
python-greenlet Bugzilla:2149497
python3.11-lxml Bugzilla:2157708
qemu-kvm Bugzilla:1880531, Bugzilla:1965079, Bugzilla:1951814, Bugzilla:2060839,
Bugzilla:2014229, Jira:RHEL-7335, Jira:RHEL-7336, Bugzilla:1915715,
Jira:RHEL-13335, Jira:RHEL-333, Bugzilla:2176010, Bugzilla:2058982,
Bugzilla:2073872
qemu-kvm / Devices Jira:RHEL-1220
qemu-kvm / Graphics Jira:RHEL-7135
qemu-kvm / Live Migration Jira:RHEL-7096, Jira:RHEL-2316, Jira:RHEL-7115
qemu-kvm / Networking Jira:RHEL-7337
rear Bugzilla:2188593, Bugzilla:2172912, Bugzilla:2196445, Bugzilla:2145014
redis Bugzilla:2129826
resource-agents Bugzilla:2174911, Bugzilla:2142518, Bugzilla:2142002, Bugzilla:2182415,
Bugzilla:2179003
restore Bugzilla:1997366
rhel-system-roles Bugzilla:2224384, Bugzilla:2216753, Bugzilla:2224385, Bugzilla:2185065,
Bugzilla:2181656, Bugzilla:2211194, Bugzilla:2218592, Bugzilla:2211723,
Bugzilla:2218204, Bugzilla:2151373, Bugzilla:2179460, Bugzilla:2211748,
Bugzilla:2229802, Bugzilla:2181657, Bugzilla:2168692, Bugzilla:2211984,
Bugzilla:2232241, Bugzilla:2232231, Bugzilla:2224090, Bugzilla:2222761,
Bugzilla:2223764, Bugzilla:2222428, Bugzilla:2216520, Bugzilla:2211187,
Bugzilla:2209200, Bugzilla:2193058, Bugzilla:2186057, Jira:RHEL-1499,
Jira:RHEL-1397, Jira:RHEL-906, Jira:RHEL-1495, Jira:RHEL-898,
Jira:RHEL-885, Bugzilla:1999770, Bugzilla:2123859, Jira:RHEL-1172,
Bugzilla:2186218
Component Tickets
Red Hat Enterprise Linux 9.3 9.3 Release Notes
210
rpm Bugzilla:2157836
rsyslog Jira:RHELPLAN-160541
rust Bugzilla:2191743, Bugzilla:2227082
s390utils Bugzilla:1932480
samba Bugzilla:2190415
scap-security-guide Bugzilla:2221697, Bugzilla:2155790, Jira:RHEL-1905, Bugzilla:2203791,
Bugzilla:2213958, Bugzilla:2223178, Bugzilla:2193169, Jira:RHEL-1800,
Bugzilla:2038978
selinux-policy Bugzilla:2080443, Bugzilla:2170495, Bugzilla:2184999, Bugzilla:2162663,
Bugzilla:2112729, Jira:RHELPLAN-163014, Bugzilla:2187745,
Bugzilla:2229722, Bugzilla:2064274
setools Bugzilla:2231801
sevctl Bugzilla:2104857
sos Bugzilla:1869561
squid-container Bugzilla:2178953
sssd Bugzilla:2065693, Bugzilla:2056482, Bugzilla:1608496
stratisd Bugzilla:2041558
subscription-manager Bugzilla:2163716, Bugzilla:2136694
sysstat Jira:RHEL-12009
systemd Bugzilla:2018112, Jira:RHEL-6105
systemtap Bugzilla:2186934
tang Bugzilla:2188743
tigervnc Bugzilla:2060308
tuned Bugzilla:2113900
Component Tickets
APPENDIX A. LIST OF TICKETS BY COMPONENT
211
ubi9-micro-container Bugzilla:2223028
udisks2 Bugzilla:1983602, Bugzilla:2213769
unbound Bugzilla:2070495
valgrind Bugzilla:2124346
virt-v2v Bugzilla:2168082
virtio-win Bugzilla:1969724, Jira:RHEL-11366, Jira:RHEL-910, Jira:RHEL-1609,
Jira:RHEL-869
virtio-win / distribution Jira:RHEL-1517, Jira:RHEL-574
virtio-win / virtio-win-
prewhql
Jira:RHEL-1084, Jira:RHEL-935, Jira:RHEL-12118, Jira:RHEL-1212
webkit2gtk3 Jira:RHEL-4157
which Bugzilla:2181974
xdp-tools Bugzilla:2218500, Jira:RHEL-3382
Component Tickets
Red Hat Enterprise Linux 9.3 9.3 Release Notes
212
other Bugzilla:2232554, Jira:RHELDOCS-17055, Jira:RHELPLAN-163133,
Jira:RHELPLAN-163665, Jira:RHELDOCS-16405, Jira:RHELDOCS-
16247, Bugzilla:2136937, Jira:RHELDOCS-16474, Jira:RHELDOCS-
16462, Jira:RHELDOCS-16386, Jira:RHELPLAN-156196,
Jira:RHELDOCS-16708, Jira:RHELDOCS-16709, Jira:RHELDOCS-
16339, Jira:RHELDOCS-16877, Jira:RHELPLAN-122345,
Jira:RHELDOCS-16487, Jira:RHELDOCS-16752, Jira:RHELDOCS-17101,
Bugzilla:2236182, Jira:RHELDOCS-17040, Bugzilla:2020529,
Bugzilla:2030412, Jira:RHELPLAN-103993, Jira:RHELPLAN-27394,
Jira:RHELPLAN-27737, Jira:RHELDOCS-16861, Jira:RHELDOCS-
17050, Bugzilla:1927780, Jira:RHELPLAN-110763, Bugzilla:1935544,
Bugzilla:2089200, Jira:RHELDOCS-16948, Jira:RHELPLAN-99136,
Jira:RHELDOCS-17380, Jira:RHELPLAN-103232, Bugzilla:1899167,
Bugzilla:1979521, Jira:RHELPLAN-100087, Jira:RHELPLAN-100639,
Bugzilla:2058153, Jira:RHELPLAN-113995, Jira:RHELPLAN-98983,
Jira:RHELPLAN-131882, Jira:RHELPLAN-139805, Jira:RHELDOCS-
16756, Jira:RHELPLAN-153267, Jira:RHELDOCS-16300,
Jira:RHELDOCS-16432, Jira:RHELDOCS-16393, Jira:RHELDOCS-
16612, Jira:RHELDOCS-17102, Jira:RHELPLAN-157225, Jira:RHELPLAN-
157337, Bugzilla:1640697, Bugzilla:1697896, Bugzilla:2047713,
Jira:RHELPLAN-96940, Jira:RHELPLAN-117234, Jira:RHELPLAN-
119001, Jira:RHELPLAN-119852, Bugzilla:2077767, Bugzilla:2053598,
Bugzilla:2082303, Jira:RHELPLAN-121049, Jira:RHELPLAN-157939,
Jira:RHELPLAN-109613, Bugzilla:2160619, Bugzilla:2173992,
Bugzilla:2185048, Bugzilla:1970830, Jira:RHELDOCS-16574
Component Tickets
APPENDIX A. LIST OF TICKETS BY COMPONENT
213
APPENDIX B. REVISION HISTORY
0.2-3
Thu Jul 18 2024, Gabriela Fialová (gfialova@redhat.com)
Updated the abstract in the Deprecated functionalities section
0.2-2
Tue Jun 11 2024, Brian Angelica (bangelic@redhat.com)
Add Deprecated Functionality RHELDOCS-18049 (Shells and command-line tools).
0.2-1
Tue Jun 11 2024, Brian Angelica (bangelic@redhat.com)
Added an Known Issue RHEL-24847 (Shells and command-line tools).
0.2-0
Thu May 16 2024, Gabriela Fialová (gfialova@redhat.com)
Added an Known Issue RHEL-10019 (Virtualization).
0.1-9
Thu Apr 18 2024, Gabriela Fialová (gfialova@redhat.com)
Added an Enhancement RHEL-19142 (Networking).
0.1-8
Thu Apr 11 2024, Gabriela Fialová (gfialova@redhat.com)
Added an Enhancement BZ#1513934 (IdM)
0.1-7
Thu Mar 14 2024, Gabriela Fialová (gfialova@redhat.com)
Added a Known Issue JIRA:RHEL-25967 (Kernel)
0.1-6
Mon Mar 04 2024, Gabriela Fialová (gfialova@redhat.com)
Added a bug fix Jira:SSSD-6096 (Identity Management).
0.1-5
Wed Feb 28 2024, Gabriela Fialová (gfialova@redhat.com)
Updated a Known Issue to Bug Fix RHEL-8171 (Storage).
0.1-4
Wed Feb 7 2024, Lucie Vařáková (lvarakova@redhat.com)
Added a new feature RHEL-14694 (Networking).
Red Hat Enterprise Linux 9.3 9.3 Release Notes
214
0.1-3
Thu Feb 1 2024, Gabriela Fialová (gfialova@redhat.com)
Added a KI BZ#1834716 (Security)
Updated s Deprecated Functionality RHELDOCS-16756 (Container tools)
0.1-2
Mon Jan 29 2024, Gabriela Fialová (gfialova@redhat.com)
Added a bug fix RHELPLAN-157337 (Security)
0.1-1
Thu Jan 2024, Lenka Špačková (lspackova@redhat.com)
Added an enhancement related to Python RHELDOCS-17369 (Dynamic programming
languages, web and database servers)
0.1-0
Wed Jan 10 2024, Gabriela Fialová (gfialova@redhat.com)
Add Deprecated Functionality RHELDOCS-17380 (Security)
0.0-9
Tue Jan 2 2024, Gabriela Fialová (gfialo[email protected]om)
Updated description in Enhancement BZ#2184403
0.0-8
Thu Nov 23 2023, Gabriela Fialová (gfialova@redhat.com)
Added KI RHEL-8354 (installer)
0.0-7
Wed Nov 22 2023, Gabriela Fialová (gfialova@redhat.com)
Add IdM KI RHEL-17178
0.0-6
Tue Nov 21 2023, David Vozenilek (dvoze[email protected]om)
Add System Roles RNs BZ#2211723, BZ#2218204, BZ#2186057
0.0-5
Mon Nov 20 2023, Jana Heves (jsvarova@redhat.com)
Add KI RHEL-15404 sst_kernel_generalists
0.0-4
Sun Nov 19 2023, Filip Hanzelka (fhanzelk@redhat.com)
Add BF in IdM RHELDOCS-17011
APPENDIX B. REVISION HISTORY
215
0.0-3
Thu Nov 16 2023, Marek Suchánek (msuchane@redhat.com)
Deprecate Inkscape and LibreOffice Flatpak RHELDOCS-17102
0.0-2
Thu Nov 16 2023, Lenka Špačková (lspackova@redhat.com)
Node.js 20 is now fully supported (BZ#2186717).
0.0-1
Wed Nov 08 2023, Gabriela Fialová (gfialova@redhat.com)
Release of the Red Hat Enterprise Linux 9.3 Release Notes.
0.0-0
Wed Sep 27 2023, Gabriela Fialová (gfialova@redhat.com)
Release of the Red Hat Enterprise Linux 9.3 Beta Release Notes.
Red Hat Enterprise Linux 9.3 9.3 Release Notes
216
