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avcodec/apedec: fix integer overflow in 8bit samples

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Fixes: signed integer overflow: 2147483542 + 128 cannot be represented in type 'int'
Fixes: 42812/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-6344057861832704

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 7cee3b37187dbf61dbebff023f07ceedfc0129bb)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-12-23 20:39:14 +01:00
parent c45013d6c5
commit 429eaaf16e
1 changed files with 1 additions and 1 deletions
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libavcodec/apedec.c
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@ -1559,7 +1559,7 @@ static int ape_decode_frame(AVCodecContext *avctx, void *data,
for (ch = 0; ch < s->channels; ch++) { for (ch = 0; ch < s->channels; ch++) {
sample8 = (uint8_t *)frame->data[ch]; sample8 = (uint8_t *)frame->data[ch];
for (i = 0; i < blockstodecode; i++) for (i = 0; i < blockstodecode; i++)
*sample8++ = (s->decoded[ch][i] + 0x80) & 0xff; *sample8++ = (s->decoded[ch][i] + 0x80U) & 0xff;
} }
break; break;
case 16: case 16: