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avcodec/aptx: Check the number of channels

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Fixes: store to null pointer of type 'uint32_t' (aka 'unsigned int')
Fixes: 18021/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APTX_HD_fuzzer-5761738313564160

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 98a257c323)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-10-09 09:53:26 +02:00
parent 5cf9d6c586
commit 59a2b67c79
1 changed files with 3 additions and 0 deletions
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3
libavcodec/aptx.c
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@ -989,6 +989,9 @@ static av_cold int aptx_init(AVCodecContext *avctx)
AptXContext *s = avctx->priv_data;
int chan, subband;
if (avctx->channels != 2)
return AVERROR_INVALIDDATA;
s->hd = avctx->codec->id == AV_CODEC_ID_APTX_HD;
s->block_size = s->hd ? 6 : 4;