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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-05 13:12:54 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-07 19:52:57 +0200 |
| commit | a711efe922b2bf1d363bdf7f8357656c3e35021e (patch) | |
| tree | 3c57870d1902e08353e38eea6a4d9b97bdef9b86 | |
| parent | d91a0b503d7a886587281bc1ee42476aa5e89f85 (diff) | |
| download | ffmpeg-a711efe922b2bf1d363bdf7f8357656c3e35021e.tar.gz | |
avcodec/shorten: Fix a negative left shift in shorten_decode_frame()
Fixes: left shift of negative value -9057
Fixes: 8527/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-5666853924896768
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/shorten.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index 8aeacfeb31..f7475b4954 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -710,7 +710,7 @@ static int shorten_decode_frame(AVCodecContext *avctx, void *data, if (s->version < 2) s->offset[channel][s->nmean - 1] = sum / s->blocksize; else - s->offset[channel][s->nmean - 1] = s->bitshift == 32 ? 0 : (sum / s->blocksize) << s->bitshift; + s->offset[channel][s->nmean - 1] = s->bitshift == 32 ? 0 : (sum / s->blocksize) * (1 << s->bitshift); } /* copy wrap samples for use with next block */ |