Hi,

this patch fixes the crash reported by Anton Nefedov here:

   https://lists.gnu.org/archive/html/qemu-block/2017-11/msg00159.html

I can reproduce it easily with the change he mentions there, or by
tweaking iotest 030 as I show here:

   https://lists.gnu.org/archive/html/qemu-block/2017-11/msg00934.html

I'm not convinced that this is the best solution, though. As Fam says
the block layer is getting complex and I think this can be solved in a
different way if the code is properly rewritten. Even with this
solution I think it would make sense to assert that the block job's
pause count is always 0 when the job is about to be destroyed and
perhaps keep a reference while it's being paused. But that's a bigger
change and we're close to the release so I opted for this more
conservative approach.

Regards,

Berto

Alberto Garcia (1):
  blockjob: Make block_job_pause_all() keep a reference to the jobs

 blockjob.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

-- 
2.11.0