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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-03-03 04:39:05 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-17 20:35:19 +0200 |
| commit | f458d65bb42b8709d2bb169413744786d55781b0 (patch) | |
| tree | fe1aeb2f6db216fc69db28292eee626141ef7e23 | |
| parent | 868de78861cce3d5bac549f6c4929e3276513f06 (diff) | |
| download | ffmpeg-f458d65bb42b8709d2bb169413744786d55781b0.tar.gz | |
avcodec/mpeg12dec: Fix runtime error: left shift of negative value -13
Fixes: 709/clusterfuzz-testcase-4789836449841152
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit d757ddbaab8f03b3664788e620314b70ac791319)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mpeg12dec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c index 6e378edf57..4f520819e0 100644 --- a/libavcodec/mpeg12dec.c +++ b/libavcodec/mpeg12dec.c @@ -563,7 +563,7 @@ static inline int mpeg2_decode_block_intra(MpegEncContext *s, dc = s->last_dc[component]; dc += diff; s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); + block[0] = dc * (1 << (3 - s->intra_dc_precision)); ff_tlog(s->avctx, "dc=%d\n", block[0]); mismatch = block[0] ^ 1; i = 0; |