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[Lee Yarwood <lyarwood@xxxxxxxxxx>]

Public bug reported:

The fix for OSSA 2016-007 / CVE-2016-2140 in f302bf04 assumed that
disk_info is always a plain, decoded list. However prior to Liberty when
preforming a live block migration the compute manager populates
disk_info with an encoded JSON string when calling
self.driver.get_instance_disk_info. In the live migration case without
block migration disk_info remains a plain decoded list.

More details with an example trace downstream in the following bug :

live migration without shared storage fails in pre_live_migration after upgrade to 2015.1.2-18.2
https://bugzilla.redhat.com/show_bug.cgi?id=1318722

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1558697

Title:
  [kilo] libvirt block migrations fail due to disk_info being an encoded
  JSON string

Status in OpenStack Compute (nova):
  New

Bug description:
  The fix for OSSA 2016-007 / CVE-2016-2140 in f302bf04 assumed that
  disk_info is always a plain, decoded list. However prior to Liberty
  when preforming a live block migration the compute manager populates
  disk_info with an encoded JSON string when calling
  self.driver.get_instance_disk_info. In the live migration case without
  block migration disk_info remains a plain decoded list.

  More details with an example trace downstream in the following bug :

  live migration without shared storage fails in pre_live_migration after upgrade to 2015.1.2-18.2
  https://bugzilla.redhat.com/show_bug.cgi?id=1318722

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