RHBA-2014:1192 - Bug Fix Advisory

Topic

Updated kexec-tools packages that fix two bugs are now available for Red Hat
Enterprise Linux 6.

Description

The kexec-tools packages contain the /sbin/kexec binary and utilities that
together form the user-space component of the kernel's kexec feature. The
/sbin/kexec binary facilitates a new kernel to boot using the kernel's kexec
feature either on a normal or a panic reboot. The kexec fastboot mechanism
allows booting a Linux kernel from the context of an already running kernel.

This update fixes the following bugs:

• Previously, if you had two interfaces, one configured with a default gateway,

and the other with a static route to a private network, kexec-tools ignored the
non-default static route. As a consequence, kdump failed to perform a kernel
crash dump over a Network File System (NFS) or SSH because it did not configure
the route to the private network. This bug has been fixed and now kdump
successfully dumps the kernel over NFS or SSH. (BZ#1110184)

• Previously, booting the crash kernel with more than one CPUs occasionally

caused some systems to become unresponsive when the crash happened on an
Application Processor (AP) and not on the Boot Strap Processor (BSP). To fix
this bug, the initialization scripts were modified to include the
disable_cpu_apicid kernel option automatically which acts as the BSP ID.
Additionally, the user has to modify the value of the nr_cpus option to specify
the number of CPUs used on the system. With this fix, the user can now
successfully use the crash kernel with more than one CPUs on the system.
(BZ#1127805)

Users of kexec-tools are advised to upgrade to these updated packages, which fix
these bugs.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.5 i386
• Red Hat Enterprise Linux Server - AUS 6.5 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.5 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.5 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.5 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.5 i386
• Red Hat Enterprise Linux EUS Compute Node 6.5 x86_64
• Red Hat Enterprise Linux Server - TUS 6.5 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

CVEs

(none)

References

• https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.5_Technical_Notes/kexec-tools.html#RHBA-2013-1576