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avcodec/siren: Check index for catergory5

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Fixes: out of array access
Fixes: 38603/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MSNSIREN_fuzzer-5741847809490944.fuzz

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-09-17 21:51:06 +02:00
parent 71b4d16bca
commit db18f29b33
1 changed files with 4 additions and 0 deletions
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4
libavcodec/siren.c
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@ -648,6 +648,10 @@ static int decode_vector(SirenContext *s, int number_of_regions,
}
coefs_ptr++;
}
if (i >= FF_ARRAY_ELEMS(noise_category5)) {
error = 1;
break;
}
noise = decoder_standard_deviation[region] * noise_category5[i];
} else