diff options
author | Takashi Iwai <tiwai@suse.de> | 2020-01-15 21:37:33 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-23 08:18:38 +0100 |
commit | 98ca09ec2d2a675f370832c838176e63a3542065 (patch) | |
tree | a1f737aebdc94bab5bae260df6bc896f7c4550bd /drivers/i2c | |
parent | 05ee97a3924d62a821e907a61bc1b0ccc420c654 (diff) |
ALSA: seq: Fix racy access for queue timer in proc read
commit 60adcfde92fa40fcb2dbf7cc52f9b096e0cd109a upstream.
snd_seq_info_timer_read() reads the information of the timer assigned
for each queue, but it's done in a racy way which may lead to UAF as
spotted by syzkaller.
This patch applies the missing q->timer_mutex lock while accessing the
timer object as well as a slight code change to adapt the standard
coding style.
Reported-by: syzbot+2b2ef983f973e5c40943@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200115203733.26530-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/i2c')
0 files changed, 0 insertions, 0 deletions