RHBA-2012:1121 - 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:

• Previously, the KVM modules were not loaded by the postinstall scriplet of RPM

scripts. This bug caused various issues and required the system to be rebooted
to resolve them. With this update, the modules are loaded properly by the
scriptlet and no unnecessary reboots are now required. (BZ#839897)

• Previously, when a guest was started up with two serial devices, qemu-kvm

returned an error message and terminated the boot because IRQ 4 for the ISA bus
was being used by both devices. This update fixes the qemu-kvm code, which
allows IRQ 4 to be used by more than one device on the ISA bus, and the boot now
succeeds in the described scenario. (BZ#840054)

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
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64

Fixes

• BZ - 840054 - guest fails with error: isa irq 4 already assigned when starting guest with more than two serial devices

CVEs

(none)

References

(none)