ALSA: seq: Fix missing NULL check at remove_events ioctl
authorTakashi Iwai <tiwai@suse.de>
Tue, 12 Jan 2016 11:38:02 +0000 (12:38 +0100)
committerBen Hutchings <ben@decadent.org.uk>
Sat, 13 Feb 2016 10:34:08 +0000 (10:34 +0000)
commit 030e2c78d3a91dd0d27fef37e91950dde333eba1 upstream.

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>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

No differences found