diff options
| author | Rabin Vincent <rabin@rab.in> | 2012-01-29 12:17:33 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-20 12:46:18 -0800 |
| commit | 884d833e27faee8f929f95ca1be53b1997c66c30 (patch) | |
| tree | e4fcab399c71e061e6423baf740fd2dfbe6e7e6e /sound | |
| parent | 03b762ab87db7977a7e6d9fe92dd63fa6dbc5f02 (diff) | |
backing-dev: fix wakeup timer races with bdi_unregister()
commit 2673b4cf5d59c3ee5e0c12f6d734d38770324dc4 upstream.
While 7a401a972df8e18 ("backing-dev: ensure wakeup_timer is deleted")
addressed the problem of the bdi being freed with a queued wakeup
timer, there are other races that could happen if the wakeup timer
expires after/during bdi_unregister(), before bdi_destroy() is called.
wakeup_timer_fn() could attempt to wakeup a task which has already has
been freed, or could access a NULL bdi->dev via the wake_forker_thread
tracepoint.
Cc: Jens Axboe <axboe@kernel.dk>
Reported-by: Chanho Min <chanho.min@lge.com>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions