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avcodec/hcadec: Check scale_factors

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Fixes: out of array read
Fixes: 21286/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HCA_fuzzer-5683183715876864

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 2020-03-28 22:04:06 +01:00
parent fa164bc50e
commit 67de1865b1
1 changed files with 1 additions and 0 deletions
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libavcodec/hcadec.c
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@ -345,6 +345,7 @@ static void unpack(HCAContext *c, ChannelContext *ch,
} else {
factor += delta - half_max;
}
factor = av_clip_uintp2(factor, 6);
ch->scale_factors[i] = factor;
}