diff options
| author | Krzysztof Ha?asa <khalasa@piap.pl> | 2018-06-28 17:45:07 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-26 08:36:31 +0200 |
| commit | 8992a70297ed01f7c898f854b1edcf4a0ad4521c (patch) | |
| tree | 478a9256b5c520c556559b4c12f0a33e30d3133f /drivers | |
| parent | 48a90a9e56a37d9b0fbc81ca08411c84040d5918 (diff) | |
media: tw686x: Fix oops on buffer alloc failure
[ Upstream commit 5a1a2f63d840dc2631505b607e11ff65ac1b7d3c ]
The error path currently calls tw686x_video_free() which requires
vc->dev to be initialized, causing a NULL dereference on uninitizalized
channels.
Fix this by setting the vc->dev fields for all the channels first.
Fixes: f8afaa8dbc0d ("[media] tw686x: Introduce an interface to support multiple DMA modes")
Signed-off-by: Krzysztof Ha?asa <khalasa@piap.pl>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/pci/tw686x/tw686x-video.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/media/pci/tw686x/tw686x-video.c b/drivers/media/pci/tw686x/tw686x-video.c index 0ea8dd44026c..3a06c000f97b 100644 --- a/drivers/media/pci/tw686x/tw686x-video.c +++ b/drivers/media/pci/tw686x/tw686x-video.c @@ -1190,6 +1190,14 @@ int tw686x_video_init(struct tw686x_dev *dev) return err; } + /* Initialize vc->dev and vc->ch for the error path */ + for (ch = 0; ch < max_channels(dev); ch++) { + struct tw686x_video_channel *vc = &dev->video_channels[ch]; + + vc->dev = dev; + vc->ch = ch; + } + for (ch = 0; ch < max_channels(dev); ch++) { struct tw686x_video_channel *vc = &dev->video_channels[ch]; struct video_device *vdev; @@ -1198,9 +1206,6 @@ int tw686x_video_init(struct tw686x_dev *dev) spin_lock_init(&vc->qlock); INIT_LIST_HEAD(&vc->vidq_queued); - vc->dev = dev; - vc->ch = ch; - /* default settings */ err = tw686x_set_standard(vc, V4L2_STD_NTSC); if (err) |