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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-28 00:30:33 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-29 21:21:08 +0200 |
| commit | 09a1d15de7942c32d1e17381c6ca8cc41e236afb (patch) | |
| tree | 98405dc019113a1558db2d348baeb1d8a12f9792 | |
| parent | 0ca5c57d9d0670097235102abd54cccfb3f3c2db (diff) | |
| download | ffmpeg-09a1d15de7942c32d1e17381c6ca8cc41e236afb.tar.gz | |
avcodec/snowdec: Fix integer overflow in decode_subband_slice_buffered()
Fixes: runtime error: signed integer overflow: 267 * 8388608 cannot be represented in type 'int'
Fixes: 2743/clusterfuzz-testcase-minimized-5820652076400640
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 732f9764561558a388c05483ed6a722a5c67b05c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/snowdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c index 572d51e7a4..b139e5c5aa 100644 --- a/libavcodec/snowdec.c +++ b/libavcodec/snowdec.c @@ -115,7 +115,7 @@ static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, sli v = b->x_coeff[new_index].coeff; x = b->x_coeff[new_index++].x; while(x < w){ - register int t= ( (v>>1)*qmul + qadd)>>QEXPSHIFT; + register int t= (int)( (v>>1)*(unsigned)qmul + qadd)>>QEXPSHIFT; register int u= -(v&1); line[x] = (t^u) - u; |