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

Seyeong Kim seyeong.kim at canonical.com
Tue Nov 22 13:17:15 UTC 2016


Hello seb128

I asked SRU only one commit at first,

but I found this raises bug 1587039(after browsing this symptom), then
now I'm asking to sponsor or sru new debdiff.

the patch in the queue needs to be NAck and be changed to latest one if
is ok.

I asked cpaelzer guide this and he commented to
https://bugs.launchpad.net/cloud-archive/+bug/1587039 about this.

Would you mind if you nack this and change patch?

Thanks a lot

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https://bugs.launchpad.net/bugs/1640382

Title:
  Segfault event notifier because of race condition

Status in Ubuntu Cloud Archive:
  Confirmed
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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