[Qemu-devel] [Bug 1706058] [NEW] Windows VM crashes when restoring from file if balloon stats polling is enabled

[Victor Tapia]

Public bug reported:

[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

[Regression Potential]

 *

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: sts

** Description changed:

  [Impact]
  
-  * Windows VMs BSOD when restoring from QEMUfile or during live
- migration if the virtio balloon stats polling is enabled.
+  * 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 
+  * 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"}}
+  [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
+  * This has been fixed upstream with commit
  4a1e48becab81020adfb74b22c76a595f2d02a01
  
  [Regression Potential]
  
-  *
+  *

-- 
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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 QEMU:
  New

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

  [Regression Potential]

   *

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