[FFmpeg-devel] [PATCH 3/3] avcodec/h264_mvpred: Fix multiple runtime error: left shift of negative value
Michael Niedermayer
michael at niedermayer.cc
Fri Mar 3 05:39:06 EET 2017
Fixes: 710/clusterfuzz-testcase-5091051431788544
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/h264_mvpred.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/h264_mvpred.h b/libavcodec/h264_mvpred.h
index 24f250d794..339cf623d5 100644
--- a/libavcodec/h264_mvpred.h
+++ b/libavcodec/h264_mvpred.h
@@ -248,7 +248,7 @@ static av_always_inline void pred_8x16_motion(const H264Context *const h,
if (IS_INTERLACED(type)) { \
refn >>= 1; \
AV_COPY32(mvbuf[idx], mvn); \
- mvbuf[idx][1] <<= 1; \
+ mvbuf[idx][1] *= 2; \
mvn = mvbuf[idx]; \
} \
} \
--
2.11.0
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