Issued:

2012-02-28

Updated:

2012-02-28

RHBA-2012:0342 - libvirt bug fix update

Synopsis

libvirt bug fix update

Type/Severity

Bug Fix Advisory

Topic

Updated libvirt packages that fix four bugs are now available for Red Hat Enterprise Linux 6.

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:

• Under certain circumstances, a rare race condition between the poll() event handler and the dmidecode utility could occur. This race could result in dmidecode waiting indefinitely to perform a read operation on the already closed file descriptor. As a consequence, it was impossible to perform any tasks for virtualized guests using the libvirtd management daemon, or perform certain tasks using the virt-manager utility, such as creating a new virtual machine. This update modifies the underlying code so that the race condition no longer occurs and libvirtd and virt-manager work as expected. (BZ#783453)

• Previously, when libvirt tried to attach certain SR-IOV (Single Root I/O Virtualization) devices to virtual guests, this attempts failed with the "Unable to reset PCI device" error messages. This patch modifies the underlying code so that these PCI devices can now be successfully attached to guests. (BZ#784785)

• When migrating a QEMU domain and using SPICE for a remote display, the migration was failing and the display was erratic under certain circumstances. This was happening because with the incoming migration connection open, QEMU was unable to accept any other connections on the target host. With this update, the underlying code has been modified to delay the migration connection until the SPICE client is connected to the target destination. The guest domains can now be successfully migrated without disrupting the display during the migration. (BZ#787620)

• Previously, if the libvirt package was built with avahi support, libvirt required the avahi package to be installed on the system as a prerequisite for its own installation. If the avahi package could not be installed on the system due to security concerns, installation of libvirt failed. This update modifies the libvirt.spec file to require only the avahi-libs package. The libvirt package is now successfully installed and libvirtd starts as expected. (BZ#790779)

All users of libvirt are advised to upgrade to these updated packages, which fix these bugs. After installing these updated packages, libvirtd must be restarted. Use the "service libvirtd restart" command for this update to take effect.

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 This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

Updated Packages

• libvirt-client-0.9.4-23.el6_2.6.ppc64.rpm
• libvirt-client-0.9.4-23.el6_2.6.i686.rpm
• libvirt-0.9.4-23.el6_2.6.src.rpm
• libvirt-devel-0.9.4-23.el6_2.6.s390.rpm
• libvirt-0.9.4-23.el6_2.6.s390x.rpm
• libvirt-client-0.9.4-23.el6_2.6.s390x.rpm
• libvirt-client-0.9.4-23.el6_2.6.ppc.rpm
• libvirt-devel-0.9.4-23.el6_2.6.ppc.rpm
• libvirt-debuginfo-0.9.4-23.el6_2.6.ppc64.rpm
• libvirt-lock-sanlock-0.9.4-23.el6_2.6.i686.rpm
• libvirt-python-0.9.4-23.el6_2.6.i686.rpm
• libvirt-debuginfo-0.9.4-23.el6_2.6.s390.rpm
• libvirt-debuginfo-0.9.4-23.el6_2.6.x86_64.rpm
• libvirt-devel-0.9.4-23.el6_2.6.x86_64.rpm
• libvirt-python-0.9.4-23.el6_2.6.x86_64.rpm
• libvirt-0.9.4-23.el6_2.6.x86_64.rpm
• libvirt-python-0.9.4-23.el6_2.6.ppc64.rpm
• libvirt-0.9.4-23.el6_2.6.i686.rpm
• libvirt-lock-sanlock-0.9.4-23.el6_2.6.x86_64.rpm
• libvirt-client-0.9.4-23.el6_2.6.x86_64.rpm
• libvirt-debuginfo-0.9.4-23.el6_2.6.i686.rpm
• libvirt-debuginfo-0.9.4-23.el6_2.6.ppc.rpm
• libvirt-0.9.4-23.el6_2.6.ppc64.rpm
• libvirt-devel-0.9.4-23.el6_2.6.s390x.rpm
• libvirt-devel-0.9.4-23.el6_2.6.i686.rpm
• libvirt-debuginfo-0.9.4-23.el6_2.6.s390x.rpm
• libvirt-python-0.9.4-23.el6_2.6.s390x.rpm
• libvirt-devel-0.9.4-23.el6_2.6.ppc64.rpm
• libvirt-client-0.9.4-23.el6_2.6.s390.rpm

Fixes

• This content is not included.BZ - 790779

CVEs

(none)

References

(none)

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.