diff options
| author | Michael Niedermayer <[email protected]> | 2017-02-25 21:07:24 +0100 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2017-05-20 03:41:33 +0200 |
| commit | d782b0b2ada3468dabb265f981807aa35751ea7a (patch) | |
| tree | 04e2ae4349a12adb3272af710624c2a17565d1e6 | |
| parent | e5c39ad0e9004cfe726250b67f3d0e4b389b9726 (diff) | |
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 <[email protected]>
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit aff8cf18cb0b1fa4f2e3d163c3da2f25aa6d1906)
Signed-off-by: Michael Niedermayer <[email protected]>
| -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 032edbf6d4..ec1b86a558 100644 --- a/libavcodec/mpeg12dec.c +++ b/libavcodec/mpeg12dec.c @@ -1003,8 +1003,8 @@ 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; |