RHBA-2012:1501 - Bug Fix Advisory

Topic

Updated libvirt packages that fix various bugs are now available.

Description

The libvirt library is a C API for managing and interacting with the
virtualization capabilities of Linux and other operating systems. In addition,
libvirt provides tools for remote management of virtualized systems.

This update fixes the following bugs:

• Previously, repeatedly attaching and detaching a PCI device to a guest domain

could cause the libvirt daemon to terminate unexpectedly. The erroneous
structure free operation at the root of this bug has been fixed and repeated
attach and detach actions of a PCI device now work as expected. (BZ#836916)

• On certain NUMA architectures, libvirt was failing to process and expose the

NUMA topology, possibly leading to performance degradation. These updated
packages now correctly parse and expose the NUMA topology on such machines and
make the correct CPU placement, thus avoiding the performance degradation.
(BZ#836919)

• When using the sanlock daemon for locking resources used by a domain, if such

a resource was read-only, the locking attempt failed. Consequently, it was
impossible to start a domain with a CD-ROM drive. This bug has been fixed and
sanlock can now be properly used with read-only devices. (BZ#838819)

All users of libvirt are advised to upgrade to these updated packages, which fix
these bugs.

For users of Red Hat Enterprise Virtualization Hypervisor these bug fixes
are included in advisory RHSA-2012:1505:

https://rhn.redhat.com/errata/RHBA-2012-1505.html

Solution

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

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

Affected Products

• Red Hat Virtualization 3 for RHEL 6 x86_64

Fixes

CVEs

(none)

References

• https://rhn.redhat.com/errata/RHBA-2012-1505.html