The uvc_mc_register_entity() function wrongfully selects the media_entity associated with a UVC entity when creating links. This results in access to uninitialized media_entity structures and can hit a BUG_ON statement in media_entity_create_link(). Fix it. Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> --- drivers/media/video/uvc/uvc_entity.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) This patch should fix a v3.0 regression that results in a kernel crash as reported in http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=637740 and https://bugzilla.redhat.com/show_bug.cgi?id=735437. Test results will be welcome. diff --git a/drivers/media/video/uvc/uvc_entity.c b/drivers/media/video/uvc/uvc_entity.c index 48fea37..29e2399 100644 --- a/drivers/media/video/uvc/uvc_entity.c +++ b/drivers/media/video/uvc/uvc_entity.c @@ -49,7 +49,7 @@ static int uvc_mc_register_entity(struct uvc_video_chain *chain, if (remote == NULL) return -EINVAL; - source = (UVC_ENTITY_TYPE(remote) != UVC_TT_STREAMING) + source = (UVC_ENTITY_TYPE(remote) == UVC_TT_STREAMING) ? (remote->vdev ? &remote->vdev->entity : NULL) : &remote->subdev.entity; if (source == NULL) -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
