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avcodec/apedec: Fix undefined integer overflow in long_filter_ehigh_3830()

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Fixes: signed integer overflow: -2145648640 - 3357696 cannot be represented in type 'int'
Fixes: 38899/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5358815017566208

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 2021-09-28 00:11:50 +02:00
parent 255a7b423e
commit ad517ee6e4
1 changed files with 1 additions and 1 deletions
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libavcodec/apedec.c
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@ -979,7 +979,7 @@ static void long_filter_ehigh_3830(int32_t *buffer, int length)
for (j = 7; j > 0; j--)
delay[j] = delay[j - 1];
delay[0] = buffer[i];
buffer[i] -= dotprod >> 9;
buffer[i] -= (unsigned)(dotprod >> 9);
}
}