RHBA-2016:0719 - Bug Fix Advisory

Topic

Updated kvm-qemu-rhev packages that fix two bugs are now available for Red Hat Enterprise Virtualization Hypervisor 7.

Description

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev packages provide the user-space component for running virtual machines using KVM in environments managed by Red Hat Enterprise Virtualization Manager.

This update fixes the following bugs:

• Previously, the qemu-kvm service in some case terminated unexpectedly after a long period of continuous activity. With this update, qemu-kvm can no longer reference memory after the memory has been freed, which prevents the crash from occurring. (BZ#1315195)
• Prior to this update, when the qemu-kvm service was used with the -mem-prealloc option to allocate huge pages but the operation failed, qemu-kvm incorrectly reverted to regular RAM usage. Now, qemu-kvm exits in the described situation as expected. (BZ#1324523)

Users of qemu-kvm-rhev 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.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Virtualization 3 for RHEL 7 x86_64
• Red Hat Virtualization for IBM Power LE 3 ppc64le

Fixes

• BZ - 1315195 - qemu 2.1-2.4 crashes with segfault in phys_section_destroy
• BZ - 1324523 - -mem-prealloc option does not take effect when no huge page is allocated

CVEs

(none)

References

(none)