[Bug 1640382] Re: Segfault event notifier because of race condition

[Mathew Hodson]

** Changed in: qemu (Ubuntu)
       Status: Invalid => Fix Released

** Changed in: qemu (Ubuntu)
   Importance: Undecided => Medium

** Changed in: qemu (Ubuntu Trusty)
   Importance: Undecided => Medium

** No longer affects: qemu (Ubuntu Xenial)

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Title:
  Segfault event notifier because of race condition

Status in qemu package in Ubuntu:
  Fix Released
Status in qemu source package in Trusty:
  In Progress

Bug description:
  [Impact]

  Sometimes instance get crashed with segfault on event notifier

  gdb traceback is below[1]

  trying to do SRU with below commits[2][3]

  [Testcase]

  I can't provide the step to reproduce this issue

  but provided gdb backtrace for this.

  [Regeression Potential]

  Above patch is merged on 2014, and it's quite simple patch.

  [Other Info]

  related link attached

  [1] http://pastebin.ubuntu.com/23449623/

  [2] http://git.qemu.org/?p=qemu.git;a=commit;h=924fe1293c3e7a3c787bbdfb351e7f168caee3e9
  [3] http://git.qemu.org/?p=qemu.git;a=commit;h=df54f5efed9b3be7f40e14113cc1f13f5889e644 ( cherrypicked commit )

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