[media] videobuf2-core: Check user space planes array in dqbuf
The number of planes in videobuf2 is specific to a buffer. In order to
verify that the planes array provided by the user is long enough, a new
vb2_buf_op is required.
Call __verify_planes_array() when the dequeued buffer is known. Return an
error to the caller if there was one, otherwise remove the buffer from the
done list.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Cc: stable@vger.kernel.org # for v4.4 and later
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 8a0f55b..5342ff4 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -375,6 +375,9 @@
/**
* struct vb2_ops - driver-specific callbacks
*
+ * @verify_planes_array: Verify that a given user space structure contains
+ * enough planes for the buffer. This is called
+ * for each dequeued buffer.
* @fill_user_buffer: given a vb2_buffer fill in the userspace structure.
* For V4L2 this is a struct v4l2_buffer.
* @fill_vb2_buffer: given a userspace structure, fill in the vb2_buffer.
@@ -384,6 +387,7 @@
* the vb2_buffer struct.
*/
struct vb2_buf_ops {
+ int (*verify_planes_array)(struct vb2_buffer *vb, const void *pb);
void (*fill_user_buffer)(struct vb2_buffer *vb, void *pb);
int (*fill_vb2_buffer)(struct vb2_buffer *vb, const void *pb,
struct vb2_plane *planes);