Issued:
2012-12-18
Updated:
2012-12-18

RHBA-2012:1585 - qemu-kvm bug fix update

Synopsis

qemu-kvm bug fix update

Type/Severity

Bug Fix Advisory

Topic

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

Description

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm packages form the user-space component for running virtual machines using KVM.

This update fixes the following bugs:

  • If no listener is connected to a port on a host, output from the guest is suppressed until a listener is connected. However, for console ports, the guest output needs to be discarded instead. Previously, the guest kept waiting for a listener after it wrote data to a console port. But since there was no listener, the guest eventually became unresponsive. This bug has been fixed by changing behavior of the "pty" socket type to not suppress output from the ports and properly discard the data if no listener is connected. (BZ#861049)

  • With some initial guest OS installations using the QXL driver and VNC as the display protocol, virtual machines were terminating unexpectedly with a segmentation fault during setup and returned the "lost connection with kvm process" error message. A patch has been provided to address this issue and virtual machines now run properly in the described scenario. (BZ#861906)

All users of qemu-kvm are advised to upgrade to these updated packages, which fix these bugs. After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again 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

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.3x86_64
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.3x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Desktop6x86_64

Updated Packages

  • qemu-img-0.12.1.2-2.295.el6_3.5.x86_64.rpm
  • qemu-kvm-0.12.1.2-2.295.el6_3.5.src.rpm
  • qemu-kvm-tools-0.12.1.2-2.295.el6_3.5.x86_64.rpm
  • qemu-guest-agent-0.12.1.2-2.295.el6_3.5.x86_64.rpm
  • qemu-kvm-debuginfo-0.12.1.2-2.295.el6_3.5.x86_64.rpm
  • qemu-kvm-0.12.1.2-2.295.el6_3.5.x86_64.rpm

Fixes

CVEs

(none)

References

(none)

Additional information