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avcodec/dpcm: Fix integer overflow in AV_CODEC_ID_GREMLIN_DPCM 

Fixes: signed integer overflow: -2147479324 + -32568 cannot be represented in type 'int'
Fixes: 20103/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_GREMLIN_DPCM_fuzzer-5667667579240448

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 2020-01-22 23:11:47 +01:00
parent b8a0be9352
commit b1aecad9ea
1 changed files with 1 additions and 1 deletions
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2
libavcodec/dpcm.c
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@ -367,7 +367,7 @@ static int dpcm_decode_frame(AVCodecContext *avctx, void *data,
while (output_samples < samples_end) {
uint8_t n = bytestream2_get_byteu(&gb);
*output_samples++ = s->sample[idx] += s->array[n];
*output_samples++ = s->sample[idx] += (unsigned)s->array[n];
idx ^= 1;
}
}