Hard lockup and hang

[Sasha Levin]

Hi all,

While fuzzing with trinity inside a KVM tool guest, I've started to
observe an odd behavior with today's linux-next (May 29). I would
occasionally see the following message:

  [ 4130.415117] Kernel panic - not syncing: Watchdog detected hard
LOCKUP on cpu 1

But without any dump before (or after) it, and without the reboot I'm
supposed to see.

Any changes recently which can explain this behavior?
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