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avcodec/pixlet: Fix runtime error: signed integer overflow: 436207616 * -5160230545260541 cannot be represented in type 'long'

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Fixes: 1462/clusterfuzz-testcase-minimized-6558894463647744

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 60765cc42e3eb4a1193ef352a89946113a6e5802)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-10 23:48:30 +02:00
parent 924a2dd57a
commit 4a974cb595
1 changed files with 1 additions and 1 deletions
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2
libavcodec/pixlet.c
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@ -256,7 +256,7 @@ static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, i
j = 0;
dst += stride;
}
state += (int64_t)d * yflag - (d * state >> 8);
state += (int64_t)d * yflag - ((int64_t)(d * (uint64_t)state) >> 8);
flag = 0;