[Bug 1612089] Please test proposed package

Ryan Beisner 1612089 at bugs.launchpad.net
Fri Aug 26 14:34:53 UTC 2016


Hello Gaudenz, or anyone else affected,

Accepted qemu into kilo-proposed. The package will build now and be
available in the Ubuntu Cloud Archive in a few hours, and then in the
-proposed repository.

Please help us by testing this new package. To enable the -proposed
repository:

  sudo add-apt-repository cloud-archive:kilo-proposed
  sudo apt-get update

Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-kilo-needed to verification-kilo-done. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-kilo-failed. In either case, details of your testing
will help us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in
advance!

** Changed in: cloud-archive/kilo
       Status: New => Fix Committed

** Tags added: verification-kilo-needed

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https://bugs.launchpad.net/bugs/1612089

Title:
  Fix for CVE-2016-5403 causes crash on migration if memory stats are
  enabled

Status in Ubuntu Cloud Archive:
  New
Status in Ubuntu Cloud Archive icehouse series:
  New
Status in Ubuntu Cloud Archive kilo series:
  Fix Committed
Status in Ubuntu Cloud Archive liberty series:
  Fix Committed
Status in Ubuntu Cloud Archive mitaka series:
  New
Status in Ubuntu Cloud Archive newton series:
  New
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu-kvm source package in Precise:
  Fix Released
Status in qemu source package in Trusty:
  Fix Released
Status in qemu source package in Xenial:
  Fix Released
Status in qemu source package in Yakkety:
  Fix Released

Bug description:
  If memory statistics are enabled for the memory baloon device in
  libvirt like this:

  <memballoon model='virtio'>
     <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
     <stats period='10'/>
  </memballoon>

  Then qemu exits with "qemu-system-x86_64: Virtqueue size exceeded"
  after the VM is migrated or when starting the VM again after a
  managedsave.

  This bug is present since 2.0.0+dfsg-2ubuntu1.26 and was not present
  in 2.0.0+dfsg-2ubuntu1.24. It's most probably caused by the Fix for
  CVE-2016-5403.

  Steps to reproduce:
  1. Create a VM with libvirt which contains the above memory balloon device
  2. Start the VM and let the Linux kernel boot (bug does not appear if the kernel is not yet booted,  eg. while in the PXE boot phase)
  3. Issue a managedsave
  4. Start the VM again
  5. The VM is restored and "crashes" right after it starts running again.
  6. You can find the qemu output "qemu-system-x86_64: Virtqueue size exceeded" in the log at /var/log/libvirt/vmname.log

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: qemu-system-x86 2.0.0+dfsg-2ubuntu1.26
  ProcVersionSignature: Ubuntu 3.13.0-93.140-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-93-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.21
  Architecture: amd64
  Date: Thu Aug 11 08:39:33 2016
  SourcePackage: qemu
  UpgradeStatus: No upgrade log present (probably fresh install)

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