diff options
| author | Takashi Iwai <tiwai@suse.de> | 2016-02-09 12:02:32 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2016-02-09 12:02:32 +0100 |
| commit | ed8b1d6d2c741ab26d60d499d7fbb7ac801f0f51 (patch) | |
| tree | 1321d353d8fc88fa201ec6f27dfa7d32468e0b0d /crypto/rsa-pkcs1pad.c | |
| parent | ALSA: timer: Fix wrong instance passed to slave callbacks (diff) | |
| download | linux-ed8b1d6d2c741ab26d60d499d7fbb7ac801f0f51.tar.xz linux-ed8b1d6d2c741ab26d60d499d7fbb7ac801f0f51.zip | |
ALSA: timer: Fix race between stop and interrupt
A slave timer element also unlinks at snd_timer_stop() but it takes
only slave_active_lock. When a slave is assigned to a master,
however, this may become a race against the master's interrupt
handling, eventually resulting in a list corruption. The actual bug
could be seen with a syzkaller fuzzer test case in BugLink below.
As a fix, we need to take timeri->timer->lock when timer isn't NULL,
i.e. assigned to a master, while the assignment to a master itself is
protected by slave_active_lock.
BugLink: http://lkml.kernel.org/r/CACT4Y+Y_Bm+7epAb=8Wi=AaWd+DYS7qawX52qxdCfOfY49vozQ@mail.gmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'crypto/rsa-pkcs1pad.c')
0 files changed, 0 insertions, 0 deletions