[Bug 1706058] Re: Windows VM crashes when restoring from file if balloon stats polling is enabled

[ChristianEhrhardt]

Hi Victor,
I'm currently updating bugs on our virt-stack that are open but seem dormant.

Is work on this going on or is Xenial/Trusty activity that was nominated dropped for a reason?
As I can't reproduce lacking the special guest and env that was needed I'd rely on you to do so.
And since you drove the other fixes for the cloud archive you have the needed changes.

For now I'm setting these tasks to incomplete to time them out if no
feedback was provided when I clear out old bugs the next time.

** Changed in: qemu (Ubuntu Trusty)
       Status: New => Incomplete

** Changed in: qemu (Ubuntu Xenial)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1706058

Title:
  Windows VM crashes when restoring from file if balloon stats polling
  is enabled

Status in Ubuntu Cloud Archive:
  Fix Released
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu source package in Trusty:
  Incomplete
Status in qemu source package in Xenial:
  Incomplete

Bug description:
  [Impact]

   * Windows VMs BSOD when restoring from QEMUfile or during live migration if the virtio balloon stats polling is enabled.
   * Affected version: 1:2.5+dfsg-5ubuntu10.14 (xenial)

  [Test Case]

   * Install a Windows VM with virtio balloon drivers
   * Start the VM and enable stats polling [1]
   * Save the VM to savefile [2]
   * Restore the VM [3]
   * Enable stats polling [1] and VM will BSOD

  QMP examples:
   [1] {"execute":"qom-set","arguments":{"path":"//machine/i440fx/pci.0/child[7]","property":"guest-stats-polling-interval","value":10}}
   [2] {"execute": "migrate", "arguments": {"uri":"exec:gzip -c > /storage/cases/VM/savefiles/testVM3save.gz"}}
   [3] {"execute":"migrate-incoming","arguments":{"uri":"exec:gzip -c -d /storage/cases/VM/savefiles/testVM3save.gz"}}

  [Other Info]

   * This has been fixed upstream with commit 4a1e48becab81020adfb74b22c76a595f2d02a01
  * Related bug: https://bugzilla.redhat.com/show_bug.cgi?id=1373600

  [Regression Potential]

   *

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