From 0c9dd045f47a6ba967a0d84d0308c72aaa76a38c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 28 Feb 2017 03:13:24 +0100 Subject: [PATCH] avcodec/h264_direct: Fix runtime error: left shift of negative value -14 Fixes: 682/clusterfuzz-testcase-4799120021651456 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 4bd3f1ce3e68a9348e97ec07a247048ea72ed808) Signed-off-by: Michael Niedermayer --- libavcodec/h264_direct.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/h264_direct.c b/libavcodec/h264_direct.c index 3289fe4700..6b7347b3f8 100644 --- a/libavcodec/h264_direct.c +++ b/libavcodec/h264_direct.c @@ -600,7 +600,7 @@ single_col: { const int16_t *mv_col = l1mv[x8 * 3 + y8 * b4_stride]; - int my_col = (mv_col[1] << y_shift) / 2; + int my_col = (mv_col[1] * (1 << y_shift)) / 2; int mx = (scale * mv_col[0] + 128) >> 8; int my = (scale * my_col + 128) >> 8; fill_rectangle(&h->mv_cache[0][scan8[i8 * 4]], 2, 2, 8,