Issued:
2013-07-02
Updated:
2013-07-02

RHBA-2013:1008 - kvm bug fix update

Synopsis

kvm bug fix update

Type/Severity

Bug Fix Advisory

Topic

Updated kvm packages that fix various bugs are now available for Red Hat Enterprise Linux 5.

Description

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel.

This update fixes the following bugs:

  • Previously, tb_invalidate_phys_page_range() incurred a segmentation fault because it walked through an invalid chain of translation blocks. Thus, page_find() returned an incorrect pointer, which was subsequently used by tb_invalidate_phys_page_range() to find the head of the translation block chain. This update corrects the chain of translation blocks and crashes no longer occur. (BZ#958359)

Users of KVM are advised to upgrade to these updated packages, which fix these bugs. Note that the procedure in the Solution section must be performed before this update will 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

The following procedure must be performed before this update will take effect:

  1. Stop all KVM guest virtual machines.

  2. Either reboot the hypervisor machine or, as the root user, remove (using "modprobe -r [module]") and reload (using "modprobe [module]") all of the following modules which are currently running (determined using "lsmod"): kvm, ksm, kvm-intel or kvm-amd.

  3. Restart the KVM guest virtual machines.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.9x86_64
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server - AUS5.9x86_64

Updated Packages

  • kvm-83-262.el5_9.4.x86_64.rpm
  • kmod-kvm-83-262.el5_9.4.x86_64.rpm
  • kvm-tools-83-262.el5_9.4.x86_64.rpm
  • kmod-kvm-debug-83-262.el5_9.4.x86_64.rpm
  • kvm-debuginfo-83-262.el5_9.4.x86_64.rpm
  • kvm-83-262.el5_9.4.src.rpm
  • kvm-qemu-img-83-262.el5_9.4.x86_64.rpm

Fixes

(none)

CVEs

(none)

References

(none)

Additional information