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indeo4: Fix global array overread. 

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-03-24 12:29:05 +01:00
parent 5cddfc58d8
commit 8a20774a24
1 changed files with 4 additions and 0 deletions
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4
libavcodec/indeo4.c
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@ -404,6 +404,10 @@ static int decode_band_hdr(IVI4DecContext *ctx, IVIBandDesc *band,
av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n");
return AVERROR_INVALIDDATA;
}
if (band->quant_mat > 21) {
av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix encountered!\n");
return AVERROR_INVALIDDATA;
}
}
/* decode block huffman codebook */