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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>
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@ -674,6 +674,10 @@ static int read_dct_coeffs(GetBitContext *gb, int32_t block[64], const uint8_t *
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quant_idx = get_bits(gb, 4);
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} else {
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quant_idx = q;
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if (quant_idx > 15U) {
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av_log(0, AV_LOG_ERROR, "quant_index %d out of range\n", quant_idx);
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return AVERROR_INVALIDDATA;
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}
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}
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quant = quant_matrices[quant_idx];
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