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Takashi IwaiandGreg Kroah-Hartman ff654f1d31 ALSA: pcm: oss: Fix potential out-of-bounds shift 
commit 175b8d89fe upstream.

syzbot spotted a potential out-of-bounds shift in the PCM OSS layer
where it calculates the buffer size with the arbitrary shift value
given via an ioctl.

Add a range check for avoiding the undefined behavior.
As the value can be treated by a signed integer, the max shift should
be 30.

Reported-by: syzbot+df7dc146ebdd6435eea3@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20201209084552.17109-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-21 13:30:08 +01:00
..
oss
ALSA: pcm: oss: Fix potential out-of-bounds shift
2020-12-21 13:30:08 +01:00
seq
ALSA: seq: oss: Avoid mutex lock for a long-time ioctl
2020-09-23 14:45:14 +02:00
compress_offload.c
ALSA: compress_offload: remove redundant initialization
2020-09-03 09:26:27 +02:00
control_compat.c
ALSA: compat_ioctl: avoid compat_alloc_user_space
2020-09-21 10:37:07 +02:00
control.c
ALSA: ctl: fix error path at adding user-defined element set
2020-11-13 11:33:55 +01:00
ctljack.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
device.c
ALSA: core: Add snd_device_get_state() helper
2020-03-23 18:09:19 +01:00
hrtimer.c
ALSA: timer: Replace tasklet with work
2020-09-09 18:32:52 +02:00
hwdep_compat.c
ALSA: compat_ioctl: avoid compat_alloc_user_space
2020-09-21 10:37:07 +02:00
hwdep.c
ALSA: compat_ioctl: avoid compat_alloc_user_space
2020-09-21 10:37:07 +02:00
info_oss.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
info.c
ALSA: info: Drop WARN_ON() from buffer NULL sanity check
2020-07-17 10:59:38 +02:00
init.c
ALSA: core: init: use DECLARE_COMPLETION_ONSTACK() macro
2020-09-03 09:26:38 +02:00
isadma.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jack.c
ALSA: jack: More constification
2020-01-05 16:14:57 +01:00
Kconfig
ALSA: control: Add verification for kctl accesses
2020-01-04 09:37:59 +01:00
Makefile
…
memalloc.c
ALSA: core: memalloc: fix fallthrough position
2020-09-03 09:24:49 +02:00
memory.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
misc.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
pcm_compat.c
ALSA: pcm: Fix sparse warnings wrt snd_pcm_state_t
2020-01-31 16:23:13 +01:00
pcm_dmaengine.c
ALSA: fix kernel-doc markups
2020-10-26 15:26:31 +01:00
pcm_drm_eld.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
pcm_iec958.c
ALSA: core: pcm_iec958: fix kernel-doc
2020-07-07 10:22:33 +02:00
pcm_lib.c
ALSA: fix kernel-doc markups
2020-10-26 15:26:31 +01:00
pcm_local.h
ALSA: pcm: Make snd_pcm_hw_constraints_init() and _complete() static
2020-01-16 17:29:33 +01:00
pcm_memory.c
ALSA: core: pcm_memory: dereference pointer after NULL checks
2020-09-03 09:24:58 +02:00
pcm_misc.c
Merge tag 'asoc-v5.7' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
2020-03-30 13:43:00 +02:00
pcm_native.c
ALSA: fix kernel-doc markups
2020-10-26 15:26:31 +01:00
pcm_param_trace.h
…
pcm_timer.c
ALSA: timer: Constify snd_timer_hardware definitions
2020-01-03 09:24:07 +01:00
pcm_trace.h
…
pcm.c
ALSA: core: pcm: simplify locking for timers
2020-09-03 09:24:33 +02:00
rawmidi_compat.c
ALSA: Avoid using timespec for struct snd_rawmidi_status
2019-12-11 22:06:16 +01:00
rawmidi.c
ALSA: rawmidi: (cosmetic) align function parameters
2020-09-03 09:27:44 +02:00
seq_device.c
ALSA: core: Constify snd_device_ops definitions
2020-01-03 09:23:51 +01:00
sgbuf.c
ALSA: memalloc: Make SG-buffer helper usable for continuous buffer, too
2020-06-15 18:01:52 +02:00
sound_oss.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
sound.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
timer_compat.c
ALSA: Avoid using timespec for struct snd_timer_tread
2019-12-13 11:25:57 +01:00
timer.c
ALSA: timer: Replace tasklet with work
2020-09-09 18:32:52 +02:00
vmaster.c
ALSA: Replace the word "slave" in vmaster API
2020-07-20 10:10:47 +02:00