group.of.nepali.translators team mailing list archive

[Corey Bryant <corey.bryant@xxxxxxxxxxxxx>]

** Also affects: cloud-archive/icehouse
   Importance: Undecided
       Status: New

** Also affects: cloud-archive/newton
   Importance: Undecided
       Status: New

** Also affects: cloud-archive/mitaka
   Importance: Undecided
       Status: New

** Also affects: cloud-archive/kilo
   Importance: Undecided
       Status: New

** Also affects: cloud-archive/liberty
   Importance: Undecided
       Status: New

** Changed in: cloud-archive/icehouse
     Assignee: (unassigned) => Corey Bryant (corey.bryant)

** Changed in: cloud-archive/kilo
     Assignee: (unassigned) => Corey Bryant (corey.bryant)

** Changed in: cloud-archive/liberty
     Assignee: (unassigned) => Corey Bryant (corey.bryant)

** Changed in: cloud-archive/mitaka
     Assignee: (unassigned) => Corey Bryant (corey.bryant)

** Changed in: cloud-archive/newton
     Assignee: (unassigned) => Corey Bryant (corey.bryant)

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Matching subscriptions: Ubuntu 16.04 Bugs
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:
  New
Status in Ubuntu Cloud Archive liberty series:
  New
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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