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avcodec/adpcm: Fix overflow in FFABS() IMA_EA_EACS

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Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 19235/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ADPCM_IMA_EA_EACS_fuzzer-5680878952382464

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 794352ae9d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-12-07 00:14:16 +01:00
parent 7e0c15c3ec
commit a641bd4ad7
1 changed files with 1 additions and 1 deletions
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libavcodec/adpcm.c
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@ -1204,7 +1204,7 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
}
for (i=0; i<=st; i++) {
c->status[i].predictor = bytestream2_get_le32u(&gb);
if (FFABS(c->status[i].predictor) > (1<<16))
if (FFABS((int64_t)c->status[i].predictor) > (1<<16))
return AVERROR_INVALIDDATA;
}