This bug was fixed in the package linux - 3.13.0-111.158

---------------
linux (3.13.0-111.158) trusty; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1666905

  [ Andy Whitcroft ]
  * Windows guest got 0x5c BSOD when rebooting (LP: #1660519)
    - KVM: x86: reset RVI upon system reset
    - KVM: x86: Emulator should set DR6 upon GD like real CPU

  * ipv6: fix a refcnt leak with peer addr (LP: #1662096)
    - ipv6: fix a refcnt leak with peer addr
    - ipv6: use addrconf_get_prefix_route() to remove peer addr
    - ipv6: Avoid double dst_free

  * Enable CONFIG_NET_DROP_MONITOR=m in Ubuntu Kernel (LP: #1660634)
    - [Config] CONFIG_NET_DROP_MONITOR=m

 -- Thadeu Lima de Souza Cascardo <casca...@canonical.com>  Wed, 22 Feb
2017 10:53:06 -0300

** Changed in: linux (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1660519

Title:
  Windows guest got 0x5c BSOD when rebooting

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Fix Released

Bug description:
  [Impact]

  When rebooting Windows guest, it gets 0x5c BSOD
  Impact to 3.13 ( trusty )
  no Impact to 4.x

  [Fix]

  Upstream development
  4114c27d450bef228be9c7b0c40a888e18a3a636
  ("KVM: x86: reset RVI upon system reset")
  6d2a0526b09e551d0f395cfb63e7cb965db825af
  ("KVM: x86: Emulator should set DR6 upon GD like real CPU")

  and got one MACRO definition from below commit as 6d2a05's dependency
  6f43ed01e87c8a8dbd8c826eaf0f714c1342c039
  (whole 6f43ed commit has a lot of dependency to the other commits)

  [Testcase]

  Running 6 windows vms( 2012r2 ) on one single server.
  auto rebooting scripts in windows guest.
  after one day (around hundred rebooting), can get 0x5c certainly

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