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ALSA: seq: Remove spurious WARN_ON() at timer check
authorTakashi Iwai <tiwai@suse.de>
Thu, 30 Nov 2017 09:08:28 +0000 (10:08 +0100)
committerTakashi Iwai <tiwai@suse.de>
Thu, 30 Nov 2017 09:08:28 +0000 (10:08 +0100)
commit43a3542870328601be02fcc9d27b09db467336ef
treedb62e66941edf61f3cd54a7f398188f3ed4727bctree | snapshot
parent4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323commit | diff
ALSA: seq: Remove spurious WARN_ON() at timer check

The use of snd_BUG_ON() in ALSA sequencer timer may lead to a spurious
WARN_ON() when a slave timer is deployed as its backend and a
corresponding master timer stops meanwhile.  The symptom was triggered
by syzkaller spontaneously.

Since the NULL timer is valid there, rip off snd_BUG_ON().

Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/core/seq/seq_timer.c diff | blob | history
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