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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-03-03 04:39:05 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-03-04 17:48:04 +0100 |
| commit | d757ddbaab8f03b3664788e620314b70ac791319 (patch) | |
| tree | 0af3a16abccc3fc1c9c6fc6b9ed098afc3ac91a8 /libavcodec | |
| parent | ab998f4c7faf90d0e46b6ead38a1df1f6a31e2eb (diff) | |
| download | ffmpeg-d757ddbaab8f03b3664788e620314b70ac791319.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>
Diffstat (limited to 'libavcodec')
| -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 d44ddb20fa..27db14c35e 100644 --- a/libavcodec/mpeg12dec.c +++ b/libavcodec/mpeg12dec.c @@ -497,7 +497,7 @@ 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; |