This is a note to let you know that I've just added the patch titled media: uvcvideo: Handle cameras with invalid descriptors to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: media-uvcvideo-handle-cameras-with-invalid-descripto.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 4445e0c3098c38ce51d6a30d2c529477bc8f2ac4 Author: Ricardo Ribalda <ribalda@xxxxxxxxxxxx> Date: Tue Sep 20 16:04:55 2022 +0200 media: uvcvideo: Handle cameras with invalid descriptors [ Upstream commit 41ddb251c68ac75c101d3a50a68c4629c9055e4c ] If the source entity does not contain any pads, do not create a link. Reported-by: syzbot <syzkaller@xxxxxxxxxxxxxxxx> Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/media/usb/uvc/uvc_entity.c b/drivers/media/usb/uvc/uvc_entity.c index 7c4d2f93d3513..cc68dd24eb42d 100644 --- a/drivers/media/usb/uvc/uvc_entity.c +++ b/drivers/media/usb/uvc/uvc_entity.c @@ -37,7 +37,7 @@ static int uvc_mc_create_links(struct uvc_video_chain *chain, continue; remote = uvc_entity_by_id(chain->dev, entity->baSourceID[i]); - if (remote == NULL) + if (remote == NULL || remote->num_pads == 0) return -EINVAL; source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING)