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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-02-25 21:07:24 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-16 16:00:22 +0200 |
| commit | b8883af656eb7613d7b0f4bb850efb205d91ff9a (patch) | |
| tree | 6dbec2447cf2ef0eb4db67595950238c7b02b9c9 | |
| parent | 72d01d4c14f73a46e7879d547d42ffe0c4382b5d (diff) | |
| download | ffmpeg-b8883af656eb7613d7b0f4bb850efb205d91ff9a.tar.gz | |
avcodec/mpeg12dec: Fix runtime error: left shift of negative value -2
671/clusterfuzz-testcase-4990381827555328
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit aff8cf18cb0b1fa4f2e3d163c3da2f25aa6d1906)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mpeg12dec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c index c585ec612f..3ae4d09a84 100644 --- a/libavcodec/mpeg12dec.c +++ b/libavcodec/mpeg12dec.c @@ -948,8 +948,8 @@ static int mpeg_decode_mb(MpegEncContext *s, int16_t block[12][64]) dmy = get_dmv(s); - s->last_mv[i][0][1] = my << my_shift; - s->last_mv[i][1][1] = my << my_shift; + s->last_mv[i][0][1] = my * (1 << my_shift); + s->last_mv[i][1][1] = my * (1 << my_shift); s->mv[i][0][0] = mx; s->mv[i][0][1] = my; |