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[Daniel Berrange <1261475@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

By default libguestfs will register an atexit() handler to cleanup any
open libguestfs handles when the process exits. Since libguestfs does
not provide any mutex locking in its APIs, the atexit handlers are not
safe in multi-threaded processes. If they run they are liable to cause
memory corruption as multiple threads access the same libguestfs handle.
As such at atexit handlers should be disabled in any multi-threaded
program using libguestfs. eg by using

  guestfs.GuestFS (close_on_exit = False)

instead of

  guestfs.GuestFS()

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1261475

Title:
  Nova should disable libguestfs' automatic cleanup

Status in OpenStack Compute (Nova):
  New

Bug description:
  By default libguestfs will register an atexit() handler to cleanup any
  open libguestfs handles when the process exits. Since libguestfs does
  not provide any mutex locking in its APIs, the atexit handlers are not
  safe in multi-threaded processes. If they run they are liable to cause
  memory corruption as multiple threads access the same libguestfs
  handle. As such at atexit handlers should be disabled in any multi-
  threaded program using libguestfs. eg by using

    guestfs.GuestFS (close_on_exit = False)

  instead of

    guestfs.GuestFS()

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