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avcodec/hq_hqa: Fix: runtime error: signed integer overflow: -255 * 10180917 cannot be represented in type 'int'

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Fixes: 1626/clusterfuzz-testcase-minimized-6416580571299840

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3d9cb583c8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-16 23:44:24 +02:00
parent 9dcd02a5a5
commit 28d7c43d0f
1 changed files with 1 additions and 1 deletions
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libavcodec/hq_hqa.c
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@ -82,7 +82,7 @@ static int hq_decode_block(HQContext *c, GetBitContext *gb, int16_t block[64],
pos += ff_hq_ac_skips[val];
if (pos >= 64)
break;
block[ff_zigzag_direct[pos]] = (ff_hq_ac_syms[val] * q[pos]) >> 12;
block[ff_zigzag_direct[pos]] = (int)(ff_hq_ac_syms[val] * (unsigned)q[pos]) >> 12;
pos++;
}