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avcodec/dstdec: Check sample rate

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Fixes: out of array access
Fixes: 20659/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DST_fuzzer-5735812071424000

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>
(cherry picked from commit 5727b1f13f36c4db30d5d0de51640f740edf01e8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-02-13 20:56:56 +01:00
parent 2cfb8f35cd
commit 8f15c0e767
1 changed files with 4 additions and 0 deletions
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4
libavcodec/dstdec.c
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@ -85,6 +85,10 @@ static av_cold int decode_init(AVCodecContext *avctx)
return AVERROR_PATCHWELCOME;
}
if (DST_SAMPLES_PER_FRAME(avctx->sample_rate) & 7) {
return AVERROR_PATCHWELCOME;
}
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
for (i = 0; i < avctx->channels; i++)