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avcodec/dirac_dwt_template: Fix integer overflow in vertical_compose53iL0()

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Fixes: runtime error: signed integer overflow: 2147483646 + 2 cannot be represented in type 'int'
Fixes: 3013/clusterfuzz-testcase-minimized-4644084197097472

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 a165b53daa8a3a526d2328ca72c4aa9e7f163045)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-08-18 16:42:58 +02:00
parent 96d5786027
commit b2f99c424f
1 changed files with 1 additions and 1 deletions
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libavcodec/dirac_dwt_template.c
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@ -49,7 +49,7 @@ static void RENAME(vertical_compose53iL0)(uint8_t *_b0, uint8_t *_b1, uint8_t *_
TYPE *b1 = (TYPE *)_b1;
TYPE *b2 = (TYPE *)_b2;
for (i = 0; i < width; i++)
b1[i] -= (b0[i] + b2[i] + 2) >> 2;
b1[i] -= (int)(b0[i] + (unsigned)b2[i] + 2) >> 2;
}
static av_always_inline void RENAME(interleave)(TYPE *dst, TYPE *src0, TYPE *src1, int w2,