[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>
This commit is contained in:
parent
899e3ee404
commit
e58fced201
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@ -181,7 +181,7 @@ static void v4l2_device_release(struct device *cd)
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* TODO: In the long run all drivers that use v4l2_device should use the
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* TODO: In the long run all drivers that use v4l2_device should use the
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* v4l2_device release callback. This check will then be unnecessary.
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* v4l2_device release callback. This check will then be unnecessary.
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*/
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*/
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if (v4l2_dev->release == NULL)
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if (v4l2_dev && v4l2_dev->release == NULL)
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v4l2_dev = NULL;
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v4l2_dev = NULL;
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/* Release video_device and perform other
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/* Release video_device and perform other
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