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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-08-12 23:06:55 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-11-01 00:52:46 +0100 |
| commit | 298ca73ab14ba66fec0596fef1eda92a532a488d (patch) | |
| tree | bb197d1b9a7cc039f32f5d482e24b0d3f096b16a | |
| parent | d16d851238f4c056837ba6d8fef4b0c274b8d146 (diff) | |
| download | ffmpeg-298ca73ab14ba66fec0596fef1eda92a532a488d.tar.gz | |
avcodec/shorten: Fix signed 32bit overflow in shift in shorten_decode_frame()
Fixes: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 9480/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-6647324284551168 -rss_limit_mb=2000
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 9b604e96a51a1fca92bbabfe4f7ac53f0470ee41)
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 ad83dfb199..c63be626ba 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -711,7 +711,7 @@ 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) * (1 << s->bitshift); + s->offset[channel][s->nmean - 1] = s->bitshift == 32 ? 0 : (sum / s->blocksize) * (1LL << s->bitshift); } /* copy wrap samples for use with next block */ |