RHBA-2008:0291 - Bug Fix Advisory

Topic

Updated libvirt packages that fix several bugs and add enhancements are now
available.

Description

Libvirt is a C toolkit to interact with the virtualization capabilities of
recent versions of Linux, and other operating systems.

These updated packages fix the following bugs:

• running the "virsh attach-disk" or "virsh attach-interface" commands on

an inactive domain caused a segmentation fault.

• the "virsh vcpupin" command did not return an error when the vcpu

argument was not a number. For example, running the "virsh vcpupin [domain]
a1 [cpulist]" command, caused virtual CPU 0 to be used instead of returning
an error.

• the "virt-install" command hanged in an endless loop when 32 or more

network interface cards were specified as a parameter using the "--network"
option.

• it was not possible to create a domain using the "--hvm" and "--cdrom"

options. For example, running the "virt-install" command with the "--hvm"
and "--cdrom" options caused the following errors:

libvir: Xen error : Domain not found: xenUnifiedDomainLookupByUUID
libvir: Xen error : Domain not found: xenUnifiedDomainLookupByName
Creating domain...
virDomainDefineXML() failed

This has been resolved in these updated packages.

• attempting to attach a disk to an active domain using the "virsh

attach-disk" command caused the following error:

libvir: Xen Daemon error : POST operation failed:
(xend.err'device_configure () takes exactly 2 arguments (3 given)')

This has been resolved in these updated packages.

As well, these updated packages add the following enhancements:

• in previous versions of libvirt, it was not possible to specify physical

CPU affinity at creation time. This information was not stored permanently.
These updated packages allow you to specify CPU affinity information in the
domain XML definition file, and this information is also provided when
saving a domain XML definition file. This is useful for systems using the
NUMA architecture.

• libvirt now has support for NUMA. New APIs are provided, and the virsh

"freecell" command allows you to check the available heap memory of NUMA
cells. The virsh "capabilities" command can be used to expose NUMA topology
on systems using the NUMA architecture.

• in previous libvirt packages, it was only possible to set CPU

information, for example, CPU pinning, for the active domain. In these
updated packages, it is possible to set CPU information for inactive
domains.

• support for USB tablet has been added, which improves fully virtualized

mouse behavior.

• new APIs which improve libvirt monitoring support have been added. These

new APIs provide statistics for block and interface devices. Use the virsh
"domblkstat" and "domifstat" commands to view this information.

Users of libvirt are advised to upgrade to these updated packages, which
resolve these issues and add these enhancements.

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
http://kbase.redhat.com/faq/FAQ_58_10188

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386

Fixes

• BZ - 273421 - [5.2] virt-install hangs up when 32 NICs or more are specified as --network option
• BZ - 287811 - libvirt: fix segmentation fault when buffer needs to be reallocated
• BZ - 328841 - [5.2]Cannot create the HVM domain using CD-ROM device because virDomainDefineXML() fails.
• BZ - 346281 - [5.2] Disk cannot be attached by using virsh attach-disk.
• BZ - 426324 - libvirt mis-detects hypervisor version for NUMA apis
• BZ - 431723 - ssh remote connection errors with "Cannot allocate memory"
• BZ - 433451 - Can't start second guest via virt-manager while using shared block devices

CVEs

(none)

References

(none)