diff options
| author | Takashi Iwai <tiwai@suse.de> | 2020-12-09 09:45:52 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-30 11:25:42 +0100 |
| commit | 37172cffc6a4e5371c9a514ad6ab870108a73c9f (patch) | |
| tree | e32ccc6e4558eea8071f9a8eb97dd1cb0fa423c6 /drivers/tty | |
| parent | 912ce3daea6ff339c012d8388cde951fa8133d34 (diff) | |
ALSA: pcm: oss: Fix potential out-of-bounds shift
commit 175b8d89fe292796811fdee87fa39799a5b6b87a 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>
Diffstat (limited to 'drivers/tty')
0 files changed, 0 insertions, 0 deletions