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| author | Takashi Iwai <tiwai@suse.de> | 2016-02-09 12:02:32 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-17 12:31:00 -0800 |
| commit | 92cc7c5788b090c2a15d5dfdfdcb772d9b25e91a (patch) | |
| tree | 05d4992dc30f311a5ee02af5f473c05a1cc7b69a /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 4333cce1e75701f5ffb0f17cbe43c170e09e7e46 (diff) | |
ALSA: timer: Fix race between stop and interrupt
commit ed8b1d6d2c741ab26d60d499d7fbb7ac801f0f51 upstream.
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
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions