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media: videobuf2: add WARN_ON_ONCE if bytesused is bigger than buffer length 

In function vb2_set_plane_payload, report if the given bytesused is
bigger than the buffer size, and clamp it to the buffer size.

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Dafna Hirschfeld 2021-12-01 23:56:51 +01:00 committed by Mauro Carvalho Chehab
parent 05fd87b8d9
commit ee1806beff
1 changed files with 8 additions and 1 deletions
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9
include/media/videobuf2-core.h
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@ -1155,9 +1155,16 @@ static inline void *vb2_get_drv_priv(struct vb2_queue *q)
static inline void vb2_set_plane_payload(struct vb2_buffer *vb, static inline void vb2_set_plane_payload(struct vb2_buffer *vb,
unsigned int plane_no, unsigned long size) unsigned int plane_no, unsigned long size)
{ {
if (plane_no < vb->num_planes) /*
* size must never be larger than the buffer length, so
* warn and clamp to the buffer length if that's the case.
*/
if (plane_no < vb->num_planes) {
if (WARN_ON_ONCE(size > vb->planes[plane_no].length))
size = vb->planes[plane_no].length;
vb->planes[plane_no].bytesused = size; vb->planes[plane_no].bytesused = size;
} }
}
/** /**
* vb2_get_plane_payload() - get bytesused for the plane plane_no * vb2_get_plane_payload() - get bytesused for the plane plane_no