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avcodec/atrac3: Check block_align

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Fixes: Infinite loop
Fixes: 17620/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ATRAC3_fuzzer-5086123012915200

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-09-25 20:51:22 +02:00
parent ec4ad6fb9e
commit 2acbbe2623
1 changed files with 1 additions and 1 deletions
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2
libavcodec/atrac3.c
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@ -964,7 +964,7 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
return AVERROR_INVALIDDATA;
}
if (avctx->block_align >= UINT_MAX / 2)
if (avctx->block_align >= UINT_MAX / 2 || avctx->block_align <= 0)
return AVERROR(EINVAL);
q->decoded_bytes_buffer = av_mallocz(FFALIGN(avctx->block_align, 4) +