From 706757d26dd5e606c1745a4bb53fe45f6d6493cf Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 19 Feb 2017 18:47:13 +0100 Subject: avcodec/mpeg12dec: Fix runtime error: left shift of negative value Fixes: 608/clusterfuzz-testcase-603978286392934 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/mpeg12dec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c index f3cf6eb0bf..5f86029660 100644 --- a/libavcodec/mpeg12dec.c +++ b/libavcodec/mpeg12dec.c @@ -865,8 +865,8 @@ static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64]) s->last_mv[i][0][1]); /* full_pel: only for MPEG-1 */ if (s->full_pel[i]) { - s->mv[i][0][0] <<= 1; - s->mv[i][0][1] <<= 1; + s->mv[i][0][0] *= 2; + s->mv[i][0][1] *= 2; } } } -- cgit v1.2.3