tree d98816c29d7f5d56428897d83e9174952408114a
parent 5c06d68bc2a174a6b82dce9f100f55173b9a5189
author Takashi Iwai <tiwai@suse.de> 1452598682 +0100
committer Takashi Iwai <tiwai@suse.de> 1452615708 +0100

ALSA: seq: Fix missing NULL check at remove_events ioctl

snd_seq_ioctl_remove_events() calls snd_seq_fifo_clear()
unconditionally even if there is no FIFO assigned, and this leads to
an Oops due to NULL dereference.  The fix is just to add a proper NULL
check.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>