From: Devin Heitmueller <dheitmueller@xxxxxxxxxxxxxx> We weren't checking whether the resource was in use before calling res_free(), so applications which called STREAMOFF on a v4l2 device that wasn't already streaming would cause a BUG() to be hit (MythTV). Reported-by: Larry Finger <larry.finger@xxxxxxxxxxxx> Reported-by: Jay Harbeston <jharbestonus@xxxxxxxxx> Signed-off-by: Devin Heitmueller <dheitmueller@xxxxxxxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> --- Upstream commit: a595c1ce4c9d572cf53513570b9f1a263d7867f2 Fixes Fedora BZ: https://bugzilla.redhat.com/show_bug.cgi?id=819321 drivers/media/video/au0828/au0828-video.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/media/video/au0828/au0828-video.c b/drivers/media/video/au0828/au0828-video.c index df92322..4d5b670 100644 --- a/drivers/media/video/au0828/au0828-video.c +++ b/drivers/media/video/au0828/au0828-video.c @@ -1702,14 +1702,18 @@ static int vidioc_streamoff(struct file *file, void *priv, (AUVI_INPUT(i).audio_setup)(dev, 0); } - videobuf_streamoff(&fh->vb_vidq); - res_free(fh, AU0828_RESOURCE_VIDEO); + if (res_check(fh, AU0828_RESOURCE_VIDEO)) { + videobuf_streamoff(&fh->vb_vidq); + res_free(fh, AU0828_RESOURCE_VIDEO); + } } else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) { dev->vbi_timeout_running = 0; del_timer_sync(&dev->vbi_timeout); - videobuf_streamoff(&fh->vb_vbiq); - res_free(fh, AU0828_RESOURCE_VBI); + if (res_check(fh, AU0828_RESOURCE_VBI)) { + videobuf_streamoff(&fh->vb_vbiq); + res_free(fh, AU0828_RESOURCE_VBI); + } } return 0; -- 1.7.11.7 -- 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
