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bink: check quant_index, fix out of array read 

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-14 23:24:05 +01:00
parent 612ecfbbbb
commit e70144cba1
1 changed files with 4 additions and 0 deletions
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4
libavcodec/bink.c
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@ -674,6 +674,10 @@ static int read_dct_coeffs(GetBitContext *gb, int32_t block[64], const uint8_t *
quant_idx = get_bits(gb, 4);
} else {
quant_idx = q;
if (quant_idx > 15U) {
av_log(0, AV_LOG_ERROR, "quant_index %d out of range\n", quant_idx);
return AVERROR_INVALIDDATA;
}
}
quant = quant_matrices[quant_idx];