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avcodec/dirac_dwt_template: Fix undefined behavior in interleave() 

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 8697/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-5197148130902016

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-06-14 16:37:32 +02:00
parent aa41d322be
commit 575d8ca026
1 changed files with 2 additions and 2 deletions
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4
libavcodec/dirac_dwt_template.c
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@ -57,8 +57,8 @@ static av_always_inline void RENAME(interleave)(TYPE *dst, TYPE *src0, TYPE *src
{
int i;
for (i = 0; i < w2; i++) {
dst[2*i ] = (src0[i] + add) >> shift;
dst[2*i+1] = (src1[i] + add) >> shift;
dst[2*i ] = (src0[i] + (unsigned)add) >> shift;
dst[2*i+1] = (src1[i] + (unsigned)add) >> shift;
}
}