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| author | Antonio Ospite <ospite@studenti.unina.it> | 2011-10-12 17:59:26 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-10-19 09:48:08 -0200 |
| commit | e58fced201ad6e6cb673f07499919c3b20792d94 (patch) | |
| tree | 7db4aac4f1380e15a8c0442e74634db99ef39636 | |
| parent | 899e3ee404961a90b828ad527573aaaac39f0ab1 (diff) | |
| download | linux-e58fced201ad6e6cb673f07499919c3b20792d94.tar.bz2 | |
[media] videodev: fix a NULL pointer dereference in v4l2_device_release()
The change in 8280b66 does not cover the case when v4l2_dev is already
NULL, fix that.
With a Kinect sensor, seen as an USB camera using GSPCA in this context,
a NULL pointer dereference BUG can be triggered by just unplugging the
device after the camera driver has been loaded.
Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/v4l2-dev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index d72156517726..a5c9ed128b97 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -181,7 +181,7 @@ static void v4l2_device_release(struct device *cd) * TODO: In the long run all drivers that use v4l2_device should use the * v4l2_device release callback. This check will then be unnecessary. */ - if (v4l2_dev->release == NULL) + if (v4l2_dev && v4l2_dev->release == NULL) v4l2_dev = NULL; /* Release video_device and perform other |