Red Hat ENTERPRISE LINUX 5.3 - RELEASE MANIFEST Manuale di istruzioni

Red Hat Enterprise

Linux 5.3

Release Notes

Release Notes for all architectures.

Ryan Lerch

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Abstract

This document details the Release Notes for Red Hat Enterprise Linux 5.3.

1. Release Notes Updates .......................................................................................................... 2

1.1. Feature Updates .......................................................................................................... 2

1.2. Resolved Issues ........................................................................................................... 6

1.3. Driver Updates ............................................................................................................. 6

1.4. Virtualization ................................................................................................................ 7

1.5. Known Issues .............................................................................................................. 7

1.6. Technology Previews ................................................................................................... 9

2. Installation-Related Notes ...................................................................................................... 10

2.1. All Architectures ......................................................................................................... 10

2.2. PowerPC Architectures ............................................................................................... 12

2.3. s390x Architectures .................................................................................................... 12

2.4. ia64 Architecture ........................................................................................................ 13

3. Feature Updates ................................................................................................................... 13

4. Driver Updates ...................................................................................................................... 20

4.1. All Architectures ......................................................................................................... 20

5. Kernel-Related Notes ............................................................................................................ 24

Release Notes

5.1. All Architectures ......................................................................................................... 24

5.2. x86 Architectures ........................................................................................................ 25

5.3. PowerPC Architectures ............................................................................................... 26

5.4. x86_64 Architectures .................................................................................................. 26

5.5. s390x Architectures .................................................................................................... 26

5.6. ia64 Architecture ........................................................................................................ 27

6. Virtualization ......................................................................................................................... 27

6.1. Feature Updates ........................................................................................................ 27

6.2. Resolved Issues ......................................................................................................... 28

6.3. Known Issues ............................................................................................................ 30

7. Technology Previews ............................................................................................................ 32

8. Resolved Issues ................................................................................................................... 36

8.1. All Architectures ......................................................................................................... 36

8.2. x86_64 Architectures .................................................................................................. 39

8.3. s390x Architectures .................................................................................................... 39

8.4. PowerPC Architectures ............................................................................................... 39

9. Known Issues ....................................................................................................................... 39

9.1. All Architectures ......................................................................................................... 39

9.2. x86 Architectures ........................................................................................................ 47

9.3. x86_64 Architectures .................................................................................................. 48

9.4. PowerPC Architectures ............................................................................................... 48

9.5. s390x Architectures .................................................................................................... 49

9.6. ia64 Architecture ........................................................................................................ 50

10. Added Packages ................................................................................................................ 50

11. Dropped Packages ............................................................................................................. 68

12. Updated Packages ............................................................................................................. 70

13. Configuration Changes From Previous Release ................................................................. 210

A. Revision History 239

1. Release Notes Updates

This section contains information about Red Hat Enterprise Linux 5.3 that did not make it into the

Release Notes included in the distribution.

1.1. Feature Updates

audit Update

The audit packages contain user-space utilities for storing and searching the audit records

generated by the audit subsystem in the Linux 2.6 kernel.

These updated packages upgrade the auditd daemon and its utilities to the newer upstream

version 1.7.7, which provides the following enhancements over the previous version:

• the auditctl program, which is used to control the behavior of the audit subsystem, now supports

multiple keys in the audit rules.

• a new utility, ausyscall, which is used to cross-reference syscall name and number information,

is now provided in these updated packages.

• the aureport program has been enhanced to provide reports about keys it sees in audit events.

• event log parsing for the ausearch and aureport programs has been improved.

Feature Updates

• a sample STIG rules file, named "stig.rules", is newly provided in these updated packages. This

file contains the auditctl rules which are loaded whenever the audit daemon is started by init

scripts.

In addition to the listed enhancements, these updated audit packages also include a new feature

to allow a server to aggregate the logs of remote systems. The following instructions can be

followed to enable this feature:

1. The audispd-plugins package should be installed on all clients (but need not be installed

on the server), and the parameters for "remote_server" and "port" should be set in the /etc/

audisp/audisp-remote.conf configuration file.

2. On the server, which aggregates the logs, the "tcp_listen_port" parameter in the /etc/audit/

auditd.conf file must be set to the same port number as the clients.

3. Because the auditd daemon is protected by SELinux, semanage (the SELinux policy

management tool) must also have the same port listed in its database. If the server and client

machines had all been configured to use port 1000, for example, then running this command

would accomplish this:

semanage port -a -t audit_port_t -p tcp 1000

4. The final step in configuring remote log aggregation is to edit the /etc/hosts.allow configuration

file to inform tcp_wrappers which machines or subnets the auditd daemon should allow

connections from.

wpa_supplicant re-base

wpa_supplicant has been re-based to the latest upstream stable version 0.5.10 and include

backported fixes for a number of issues that may affect users of wireless drivers that depend on

the kernel's mac80211 wireless stack. Specific fixes and enhancements include:

• Support for a D-Bus control interface has been added. D-Bus is a popular lightweight Inter-

Process Communication mechanism, and the addition of this control interface to wpa_supplicant

allows applications (like NetworkManager) to more reliably control the supplicant.

• Cisco Aironet 340/350 wireless cards were not able to successfully connect to 802.1x-enabled

wireless networks, often used in security sensitive organizations. During the connection process

at the 4-Way WPA handshake stage, sending encryption keys to the driver would clear the

wireless card firmware's authentication state. With this update, the supplicant uses an alternate

method of supplying encryption keys to the kernel driver, allowing authentication state to be

preserved in the Aironet firmware and 802.1x connections to succeed.

• Kernel drivers utilizing the new mac80211 wireless stack were sometimes unable to connect

to wireless networks, either failing to find the requested network, or prematurely ending

communication with the wireless access point during the connection process. Some drivers

were prone to reporting multiple disconnection events during the association process, confusing

the supplicant and causing long timeouts. The supplicant also did not sufficiently instruct the

driver to disconnect when switching access points. This update fixes these issues and, in

conjunction with kernel driver updates, allow more wireless hardware to successfully connect to

wireless networks.

Release Notes

NetworkManager re-base

NetworkManager has been updated to version 0.7.0. This update provides the following fixes and

enhancements:

• NetworkManager would not display a LEAP password, even when the user selected the "show

password" option. This has been fixed through a rebase to NetworkManager 0.7.

• During the beta phase, a version of NetworkManager was unable to automatically start network

interfaces for which "ONBOOT=no" was present in the ifcfg file. NetworkManager now ignores

this value unless "NM_RESPECT_ONBOOT=yes" is also present.

• a NetworkManager plug-in was named for its upstream repository. This could cause end-users

to mistake the plug-in for an un-supported addition to Red Hat Enterprise Linux. This plug-in has

been renamed to "ifcfg-rh".

• with this update, support has been added to NetworkManager for wired 802.1x authentication.

However, after creating an 802.1x-enabled wired connection in the NetworkManager connection

editor, it may be necessary to log out, then log back in before the connection can be used from

the NetworkManager applet menu.

• NetworkManager attempted to set a hostname, but only after X had already done so. The user

could not then open new windows because the authority files had been set by X with a different

hostname. NetworkManager no longer sets hostnames.

• an update for NetworkManager that was available in the beta phase would change the run level

enablement of the package during installation, and thus prevent NetworkManager from starting.

NetworkManager no longer changes run level enablements during installation.

• on a system with more than one network adapter, network keys saved by the user while

connecting with one adapter would not be available when the user attempted to connect with

the other adapter. NetworkManager can now retrieve and use network keys saved for a different

adapter on the same network.

• previously, NetworkManager would not always prompt the user for a new network key if the

protocol or key of a wireless network changed. Although NetworkManager would wait for a new

key, it would not always open a dialog box and allow the user to provide one. NetworkManager

will now open a dialog box when needed.

• several bug fixes and enhancements for NetworkManager were available upstream.

NetworkManager has been rebased to version 0.7 to incorporate these improvements, including

mobile broadband functionality, Phase2 WPA support, and static IP functionality.

• NetworkManager would would cause a segmentation fault when resuming a session. This was

caused by the HAL dropping privileges before connecting to D-Bus, meaning that the HAL could

not send signals to NetworkManager. NetworkManager now explicitly permits signals from the

HAL.

• sometimes, X would freeze if the NetworkManager menu and a keyring manager window were

open at the same time. This updated package includes a patch from upstream that prevents this

behavior.

• if NetworkManager requires a network key from the user, it will open a pop-up window.

However, the applet previously could not steal focus from metacity and would remain in the

Feature Updates

background. The window was therefore not obvious to the user. The applet now opens in the

foreground, alerting the user to take action.

• when resuming, NetworkManager could sometimes re-establish a wireless connection, but not a

route. A fix for this problem from upstream has been included in this update.

• NetworkManager did not previously support Cisco Airo Wi-Fi cards, as these devices did not

respond to NetworkManager's attempts to detect them. NetworkManager can now detect and

use these cards.

• the NetworkManager applet would wake up and redraw its icon once per second, even when

NetworkManager was not active. Now, the applet will not wake up unless NetworkManager is

running.

• NetworkManager 0.7 connects faster than libnotify can provide a notification bubble. When

this happens, the bubble will appear at the top left corner of the screen, rather than under the

taskbar. NetworkManager notification bubbles are now delayed for a few seconds, allowing

libnotify to react.

dbus-glib re-base

The dbus-glib integration library has been re-based to version 0.73.8 This update provides

support to updated versions of NetworkManager and also implements the following bugfix and

enhancements

• cleanup of the DBusGProxy objects treated pending remote method calls incorrectly and may

have resulted in freeing invalid memory. Consequently, processes using DBusGProxy objects

may have crashed when the DBusGProxy object was freed. With this update dbus-glib correctly

handles the destruction of DBusGProxy objects, resolving this issue.

• two new function calls, dbus_g_proxy_call_with_timeout and

dbus_g_proxy_begin_call_with_timeout, have been added to dbus-glib providing the

ability to specify a timeout when making a request to a remote service.

• dbus-binding-tool now ignores namespaced Extensible Markup Language (XML) nodes when

processing introspection definition files.

sudo Re-base

sudo has been re-based to upstream version 1.6.9. This version of sudo now supports LDAP, and

allows sub-tree searching instead of just base searching (i.e. tree-level only) for sudo rights. This

allows administrators to categorize sudo rights in a tree, making user privileges easier to manage.

Note

the env_reset sudoers option from newer sudo will reset the PATH environment

variable. This is different from the behaviour in sudo-1.9.8. To keep the old behaviour

simply add PATH variable into env_keep in sudoers file.

LVM-based Cluster mirroring

With this update, the ability to create LVM mirrors in a cluster environment (i.e. while using CLVM)

is now available in Red Hat Enterprise Linux It provides for simultaneous access from multiple

cluster machines, like when using a cluster-aware file system. This solution is compatible with

existing single-machine mirrors. When switching a mirrored logical volume between single-

machine and cluster-aware, no resynchronization is necessary.

Release Notes

1.2. Resolved Issues

•system-config-network requires the fonts provided with xorg-x11-fonts-Type1 in order

to display. However, this fonts package was not previously set as a dependency for system-

config-network and it was therefore possible (for example, in the case of a minimal installation)

for system-config-network to be present on a system and yet unable to function because these

fonts were missing. This update sets xorg-x11-fonts-Type1 as a dependency for system-

config-network to ensure that these fonts will be available and that system-config-network

will display correctly.

• In Red Hat Enterprise Linux 5.2, a 64-bit version of httpd was included in addition to the existing

32-bit httpd in the PowerPC architecture. If a user installed both versions, an httpd conflict would

occur, preventing httpd from functioning properly.

To resolve this issue, the 64-bit version of httpd has been removed from this release. Any systems

with the previous 64-bit version of httpd installed should remove the package before upgrade.

1.3. Driver Updates

• the SCSI device handler infrastructure (scsi_dh) has been updated, providing added support for

LSI RDAC SCSI based storage devices.

• the tg3 driver for Broadcom Tigon3 ethernet devices has been updated to version 3.93. This applies

several upstream changes for new hardware. However, the 5785 hardware is not fully supported.

This device may be detected by the driver, but lack of PHY support may cause these chips to not

function correctly and may require the user disable any on-board 5785 cards in the system BIOS.

•scsi-target-utils now features iSCSI Extensions for RDMA (iSER), which is based on

the Linux Target (tgt) framework. iSER is included in this release as a Technology Preview, and

provides capabilities for both single and multiple portals on different subnets. Note, however, that

there are known bugs with using multiple portals on the same subnet.

To set up an iSER target component, install the scsi-target-utils and libibverbs-

devel packages. The corresponding library package for your system's Infiniband hardware is also

required. For example, in HCAs that use the cxgb3 driver the libcxgb3 package is needed, and

for HCAs using the mthca driver the libmthca package is need.

• The MPT Fusion driver has been updated to version 3.04.06, providing the following bugfixes and

enhancements:

• Previously, the MPT Fusion driver always allocated I/O resources, even if they were not required,

which may have caused issues in low resource environments. With this update, the driver now

uses the pci_enable_device_mem and pci_enable_device functions to differentiate the resource

allocations.

• Previously, the kernel would panic when the mptsas and mptcl modules were loaded in parallel.

With this update, this issue has been resolved.

• Previously, system power state changes (such as hibernation and standby) were not functioning

correctly with 106XE controllers. With this update, the driver has been modified to free and

allocate resources in power management entry points.

Virtualization

1.4. Virtualization

• A bug in the IDE/ATA driver stack that could prevent a system using kernel-xen from booting into

the kdump environment is now fixed. In previous releases, this occurred if the system encountered

a kernel panic while an IDE device was performing I/O and the IDE device was being controlled by a

device driver other than libata.

• A softlockup may have occurred when creating a guest with a large amount of memory.

Consequently, a call trace of the error was displayed on both the dom0 and the other guest. In this

update, this issue has been resolved.

• On systems with large amounts of memory (ie 256GB or more), setting up the dom0 could exhaust

the hypervisor memory heap. To work around this, the xenheap and dom0_size command line

arguments had to be set to valid values for the system. In this update, the hypervisor has been

updated to automatically set these values to a default of 32GB, which resolves this issue.

• Due to technical problems with passing TX checksum offload information between paravirtual

domains, the use of TX checksum offload in conjunction with NAT for traffic originating from another

domain is not supported. TX checksum offload can be used together with NAT as long as the NAT

rule is applied in the domain where the traffic originates.

Note that this also applies to fully virtualised domains using paravirtual network drivers. Fully

virtualised domains using fully virtualised drivers are not affected as they do not support TX

checksum offload at all.

1.5. Known Issues

• Previous versions of the 5.3 Release Notes stated that the CD-ROM/DVD-ROM unit on Dell

PowerEdge R905 servers does not work with Red Hat Enterprise Linux 5. This note was included by

error, and does not apply to Red Hat Enterprise Linux 5.3.

•kdump now serializes drive creation registration with the rest of the kdump process. Consequently,

kdump may hang waiting for IDE drives to be initialized. In these cases, it is recommended that IDE

disks not be used with kdump.

• Improvements have been made to the 'nv' driver, enhancing suspend and resume support on some

systems equipped with nVidia GeForce 8000 and 9000 series devices. Due to technical limitations,

this will not enable suspend/resume on all hardware.

•pirut sorts some package lists using the textual representation of a package, which is inconsistent

with the textual representation method used in yum. As such, some package lists (e.g. Optional

Packages list) in pirut may not display names in alphabetical order.

• The Hypervisor outputs messages regarding attempts by any guest to write to an MSR. Such

messages contain the statement Domain attempted WRMSR. These messages can be safely

ignored; furthermore, they are rate limited and should pose no performance risk.

• When upgrading from Red Hat Enterprise Linux 4 Workstation to 5 Server, OpenOffice will no

longer work correctly with SELinux. This is because the Red Hat Enterprise Linux version of

OpenOffice is built using an incorrect library. As a result, SELinux will prevent OpenOffice from

accessing any shared libraries, causing OpenOffice to fail.

To work around this, update the SELinux context to allow OpenOffice to access shared libraries. To

do so, run the following commands:

Release Notes

semanage fcontext -a -t textrel_shlib_t '/usr/lib/ooo-1.1(/.*)?'

semanage fcontext -a -t textrel_shlib_t '/usr/lib64/ooo-1.1(/.*)?'

restorecon -Rv /usr/lib/ooo-1.19

restorecon -Rv /usr/lib64/ooo-1.19

Alternatively, you can also upgrade your OpenOffice to a correct version compatible with SELinux

in Red Hat Enterprise Linux 5. You can do this by subscribing to the "Productivity App" child channel

in Red Hat Network and running the following command:

yum install openoffice-

{base,calc,draw,emailmerge,graphicfilter,headless,impress,javafilter,math,pyuno,writer,xsltfilter}

• If jumbo frames are enabled on your system, a kernel panic will occur if you attempt to unload the

bnx2 module.

• Red Hat advises that you avoid removing a block device from a guest while the device is in use.

Doing so causes Xend to lose domain information for the guest.

• Accessing the right-click menu of the NetworkManager GNOME applet may cause the GNOME

Keyring Unlock dialog to appear. When this occurs, no XII applications can receive keyboard or

mouse input.

To recover from this, switch to a virtual terminal using Ctrl+Alt+F1. Log in as the affected user

(or root) and run killall -9 nm-applet. Then, switch back to X11 using Ctrl+Alt+F7. Your

system should be able to receive keyboard and mouse input, although Red Hat recommends that

you logout and login again to allow the system to fully recover.

• On Altix systems with an ATI FireMV graphics adapter, the GUI console may not display on one

of the VGA connectors. To workaround this issue, switch to using the other VGA connector on the

dongle.

• It has been determined that 1024 byte objects in kernel slab may be lost when a call to pipe() fails.

The problem occurs because pipe() allocates pipe files, and then tries to get free file descriptors for

them. If the process is out of file descriptors, pipe() fails, but it does not clean up properly. A fix for

this problem is planned for a forthcoming 5.3 kernel update.

To workaround this issue, ensure that the process calling do_pipe has adequate file descriptors

allocated.

This issue has been observed with multipathd in particular. To avoid the problem with multipathd,

calculate the number of file descriptors (FDs) required using the formula: "FDs = Number of Paths

+ 32". If the result is greater than the default value of 1024, then the max_fds value in the defaults

section of multipath.conf should be set to the previously calculated value. For example, if there are

255 LUNs with 8 paths each, the line to be added to the defaults section of multipath.conf would be:

max_fds 2072

• The libcmpiutil-devel package depends on tog-pegasus-devel, which for the Red Hat

Enterprise Linux Desktop product is only available from the Workstation option. Therefore, any

Technology Previews

attempt to install the libcmpiutil-devel package on a system that does not have a Subscription

including the Workstation option or is not subscribed to the Workstation channel on the Red Hat

Network, will fail with an unresolved dependency error.

• It is possible in rare circumstances, for makedumpfile to produce erroneous results but not have

them reported. This is due to the fact that makedumpfile processes its output data through a

pipeline consisting of several stages. If makedumpfile fails, the other stages will still succeed,

effectively masking the failure. Should a vmcore appear corrupt, and makedumpfile is in use, it is

recommended that the core be recorded without makedumpfile and a bug be reported.

• An issue may be encountered when using system-config-cluster to configure a Postgres 8

resource agent, resulting in the postgresql service failing to start. To include a Postgres resource

agent in your cluster, please check the man page for the agent, and edit the cluster.conf file in

an editor, then update the cluster with the new configuration file using the appropriate cman_tool

command.

• Due to outstanding driver issues with hardware encryption acceleration, users of Intel WiFi Link

4965, 5100, 5150, 5300, and 5350 wireless cards are advised to disable hardware accelerated

encryption using module parameters. Failure to do so may result in the inability to connect to Wired

Equivalent Privacy (WEP) protected wireless networks after connecting to WiFi Protected Access

(WPA) protected wireless networks.

To do so, add the following options to /etc/modprobe.conf:

alias wlan0 iwlagn

options iwlagn swcrypto50=1 swcrypto=1

(where wlan0 is the default interface name of the first Intel WiFi Link device)

• kdump now restarts when CPUs or DIMMs are hot-added to a system. If multiple items are added

at the same time, several sequential restarts may be encountered. This behavior is intentional, as

it minimizes the time-frame where a crash may occur while memory or processors are not being

tracked by kdump.

1.6. Technology Previews

Software based Fibre Channel over Ethernet (FCoE)

The Fibre Channel over Ethernet (FCoE) driver (fcoe.ko), along with libfc, provides the ability to

run FCoE over a standard Ethernet card. This capability is provided as a technical preview in Red

Hat Enterprise Linux 5.3.

To enable this feature, you must login by writing the network interface name to the /sys/

module/fcoe/parameters/create file, for example:

echo eth6 > /sys/module/fcoe/parameters/create

To logout, write the network interface name to the /sys/module/fcoe/parameters/destroy

file, for example:

Release Notes

echo eth6 > /sys/module/fcoe/parameters/destroy

For further information on software based FCoE refer to: http://www.open-fcoe.org/openfc/wiki/

index.php/FCoE_Initiator_Quickstart.

Red Hat Enterprise Linux 5.3 provides full support for FCoE on three specialized hardware

implementations. These are: Cisco fnic driver, the Emulex lpfc driver, and the Qlogic qla2xx

driver.

iSER Support

iSER support, allowing for block storage transfer across a network, has been added to the scsi-

target-utils package as a Technology Preview. In this release, single portal and multiple

portals on different subnets are supported. There are known bugs when using multiple portals on

the same subnet.

To set up the iSER target component install the scsi-target-utils and libibverbs-devel RPM. The

library package for the InfiniBand hardware that is being used is also required. For example:

host channel adapters that use the cxgb3 driver the libcxgb3 package is needed, and for host

channel adapters using the mthca driver the libmthca package is needed.

There is also a known issue relating to connection timeouts in some situations. Refer to Red Hat

Bugzilla #4706271 for more information on this issue.

2. Installation-Related Notes

This section includes information specific to Anaconda and the installation of Red Hat Enterprise

Linux 5.3.

Red Hat Network can install the new and changed packages and upgrade an existing Red Hat

Enterprise Linux 5 system. Alternatively, Anaconda can upgrade an existing Red Hat Enterprise Linux

5 system or perform a fresh installation of Red Hat Enterprise Linux 5.3.

Note: upgrading from beta releases of Red Hat Enterprise Linux 5.3 to this GA release is not

supported.

Further, although Anaconda provides an option for upgrading from earlier major versions of Red

Hat Enterprise Linux to Red Hat Enterprise Linux 5.3, Red Hat does not currently support this. More

generally, Red Hat does not support in-place upgrades between any major versions of Red Hat

Enterprise Linux. (A major version is denoted by a whole number version change. For example, Red

Hat Enteprise Linux 4 and Red Hat Enterprise Linux 5 are both major versions of Red Hat Enterprise

Linux.)

In-place upgrades across major releases do not preserve all system settings, services or custom

configurations. Consequently, Red Hat strongly recommends fresh installations when upgrading from

one major version to another.

2.1. All Architectures

• The Text Mode installation of Anaconda now offers the option of switching to Virtual Network

Computing (VNC) to complete the installation.

1 https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=470627

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