Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-29 22:31:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

media: tc358743: fix possible use-after-free in tc358743_remove()

Browse Source 
This driver's remove path calls cancel_delayed_work(). However, that
function does not wait until the work function finishes. This means
that the callback function may still be running after the driver's
remove function has finished, which would result in a use-after-free.

Fix by calling cancel_delayed_work_sync(), which ensures that
the work is properly cancelled, no longer running, and unable
to re-schedule itself.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Yang Yingliang 2021-04-06 15:39:29 +02:00 committed by Mauro Carvalho Chehab
parent 686ee9b625
commit 6107a4fdf8
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/media/i2c/tc358743.c
View File

@ -2193,7 +2193,7 @@ static int tc358743_remove(struct i2c_client *client)
del_timer_sync(&state->timer);
flush_work(&state->work_i2c_poll);
}
cancel_delayed_work(&state->delayed_work_enable_hotplug);
cancel_delayed_work_sync(&state->delayed_work_enable_hotplug);
cec_unregister_adapter(state->cec_adap);
v4l2_async_unregister_subdev(sd);
v4l2_device_unregister_subdev(sd);