From c8ea57664fe3ad611c9ecd234670544ddff7ca55 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 18 Dec 2015 00:20:51 +0100 Subject: [PATCH] avcodec/h264_mc_template: prefetch list1 only if it is used in the MB Fixes ubsan warning Fixes Mozilla bug 1230276 Signed-off-by: Michael Niedermayer --- libavcodec/h264_mc_template.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/h264_mc_template.c b/libavcodec/h264_mc_template.c index eaead35bb2..e4333a733c 100644 --- a/libavcodec/h264_mc_template.c +++ b/libavcodec/h264_mc_template.c @@ -158,6 +158,7 @@ static void MCFUNC(hl_motion)(const H264Context *h, H264SliceContext *sl, } } - prefetch_motion(h, sl, 1, PIXEL_SHIFT, CHROMA_IDC); + if (USES_LIST(mb_type, 1)) + prefetch_motion(h, sl, 1, PIXEL_SHIFT, CHROMA_IDC); }