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indeo5: check quant_mat

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prevents 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 2012-05-31 05:01:28 +02:00
parent 3b275ce374
commit 8aaa00c301
1 changed files with 4 additions and 0 deletions
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4
libavcodec/indeo5.c
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@ -199,6 +199,10 @@ static int decode_gop_header(IVI45DecContext *ctx, AVCodecContext *avctx)
} }
if (band->blk_size == 8) { if (band->blk_size == 8) {
if(quant_mat >= 5){
av_log(avctx, AV_LOG_ERROR, "quant_mat %d too large!\n", quant_mat);
return -1;
}
band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0]; band->intra_base = &ivi5_base_quant_8x8_intra[quant_mat][0];
band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0]; band->inter_base = &ivi5_base_quant_8x8_inter[quant_mat][0];
band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0]; band->intra_scale = &ivi5_scale_quant_8x8_intra[quant_mat][0];