[Bug 1829380] Re: race condition between vhost_net_stop and CHR_EVENT_CLOSED on shutdown crashes qemu (fix regression)

[Dan Streetman]

** Patch added: "lp1829380.patch"
   https://bugs.launchpad.net/cloud-archive/+bug/1829380/+attachment/5264242/+files/lp1829380.patch

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https://bugs.launchpad.net/bugs/1829380

Title:
  race condition between vhost_net_stop and CHR_EVENT_CLOSED on shutdown
  crashes qemu (fix regression)

Status in Ubuntu Cloud Archive:
  New
Status in qemu package in Ubuntu:
  Invalid
Status in qemu source package in Xenial:
  In Progress

Bug description:
  [impact]

  this bug is to track re-uploading the fix for bug 1823458 plus a patch
  to fix a regression it introduced.

  instead of copying the details from bug 1823458, please see that bug
  for impact and testcase.

  [test case]

  see bug 1823458

  [regression potential]

  see bug 1823458

  additionally, the regression from the last fix is in bug 1829245.

  the change is in code where this still has the regression potential of
  causing guest networking to fail.

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