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Code Issues Releases Activity

avcodec/wavpack: Do not allow the sample format to change between channels

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Fixes: out of array access
Fixes: 22692/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVPACK_fuzzer-5678686190960640

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: David Bryant <david@wavpack.com>
Tested-by: David Bryant <david@wavpack.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-06-03 21:13:47 +02:00
parent e34686d7ac
commit bafaf95116
1 changed files with 3 additions and 0 deletions
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3
libavcodec/wavpack.c
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@ -1129,6 +1129,9 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
else
sample_fmt = AV_SAMPLE_FMT_S32P;
if (wc->ch_offset && avctx->sample_fmt != sample_fmt)
return AVERROR_INVALIDDATA;
bpp = av_get_bytes_per_sample(sample_fmt);
orig_bpp = ((s->frame_flags & 0x03) + 1) << 3;
multiblock = (s->frame_flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK;