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avcodec/adpcm: Check initial predictor for ADPCM_IMA_EA_EACS

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Fixes: signed integer overflow: -2147483360 - 631 cannot be represented in type 'int'
Fixes: 17701/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ADPCM_IMA_EA_EACS_fuzzer-5711517319692288

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 2f66e8436d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-09-27 18:02:17 +02:00
parent 9d6b1a9c2b
commit 801eeb948b
1 changed files with 4 additions and 1 deletions
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5
libavcodec/adpcm.c
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@ -1145,8 +1145,11 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
return AVERROR_INVALIDDATA;
}
}
for (i=0; i<=st; i++)
for (i=0; i<=st; i++) {
c->status[i].predictor = bytestream2_get_le32u(&gb);
if (FFABS(c->status[i].predictor) > (1<<16))
return AVERROR_INVALIDDATA;
}
for (n = nb_samples >> (1 - st); n > 0; n--) {
int byte = bytestream2_get_byteu(&gb);