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linux/sound/core/seq/oss
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Takashi Iwai 80982c7e83 ALSA: seq: oss: Serialize ioctls 
Some ioctls via OSS sequencer API may race and lead to UAF when the
port create and delete are performed concurrently, as spotted by a
couple of syzkaller cases.  This patch is an attempt to address it by
serializing the ioctls with the existing register_mutex.

Basically OSS sequencer API is an obsoleted interface and was designed
without much consideration of the concurrency.  There are very few
applications with it, and the concurrent performance isn't asked,
hence this "big hammer" approach should be good enough.

Reported-by: syzbot+1a54a94bd32716796edd@syzkaller.appspotmail.com
Reported-by: syzbot+9d2abfef257f3e2d4713@syzkaller.appspotmail.com
Suggested-by: Hillf Danton <hdanton@sina.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200804185815.2453-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-08-05 08:27:39 +02:00
..
Makefile
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
seq_oss_device.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_event.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_event.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_init.c
ALSA: seq: More constifications
2020-01-05 16:14:29 +01:00
seq_oss_ioctl.c
Merge tag 'sound-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
2019-07-05 02:03:50 +09:00
seq_oss_midi.c
ALSA: seq: oss: Fix running status after receiving sysex
2020-03-16 10:06:40 +01:00
seq_oss_midi.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_readq.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_readq.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_rw.c
Merge tag 'sound-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
2019-07-05 02:03:50 +09:00
seq_oss_synth.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_synth.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_timer.c
ALSA: Use fallthrough pseudo-keyword
2020-07-09 13:01:29 +02:00
seq_oss_timer.h
ALSA: seq: oss: remove unused inline function snd_seq_oss_timer_is_realtime
2020-04-29 15:58:55 +02:00
seq_oss_writeq.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss_writeq.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
seq_oss.c
ALSA: seq: oss: Serialize ioctls
2020-08-05 08:27:39 +02:00