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Subject: media: videobuf2: add WARN_ON_ONCE if bytesused is bigger than buffer length Author: Dafna Hirschfeld <[email protected]> Date: Wed Dec 1 23:56:51 2021 +0100 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 <[email protected]> Signed-off-by: Hans Verkuil <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> include/media/videobuf2-core.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 2467284e5f26..5468b633b9d2 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -1155,8 +1155,15 @@ static inline void *vb2_get_drv_priv(struct vb2_queue *q) static inline void vb2_set_plane_payload(struct vb2_buffer *vb, 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; + } } /** _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
