From: YueHaibing yuehaibing@huawei.com
[ Upstream commit 2e7682ebfc750177a4944eeb56e97a3f05734528 ]
'vb' null check should be done before dereferencing it in tw5864_handle_frame, otherwise a NULL pointer dereference may occur.
Fixes: 34d1324edd31 ("[media] pci: Add tw5864 driver")
Signed-off-by: YueHaibing yuehaibing@huawei.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/pci/tw5864/tw5864-video.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/media/pci/tw5864/tw5864-video.c b/drivers/media/pci/tw5864/tw5864-video.c index 1ddf80f85c24..27ff6e0d9845 100644 --- a/drivers/media/pci/tw5864/tw5864-video.c +++ b/drivers/media/pci/tw5864/tw5864-video.c @@ -1386,13 +1386,13 @@ static void tw5864_handle_frame(struct tw5864_h264_frame *frame) input->vb = NULL; spin_unlock_irqrestore(&input->slock, flags);
- v4l2_buf = to_vb2_v4l2_buffer(&vb->vb.vb2_buf); - if (!vb) { /* Gone because of disabling */ dev_dbg(&dev->pci->dev, "vb is empty, dropping frame\n"); return; }
+ v4l2_buf = to_vb2_v4l2_buffer(&vb->vb.vb2_buf); + /* * Check for space. * Mind the overhead of startcode emulation prevention.