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diracdec: check wavelet depth, prevent out of array read.

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-11 17:20:10 +01:00
parent 8c4145343d
commit 3ba58433e1
1 changed files with 4 additions and 0 deletions
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4
libavcodec/diracdec.c
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@ -996,6 +996,10 @@ static int dirac_unpack_idwt_params(DiracContext *s)
s->lowdelay.quant[level][3] = svq3_get_ue_golomb(gb);
}
} else {
if (s->wavelet_depth > 4) {
av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth);
return AVERROR_INVALIDDATA;
}
/* default quantization matrix */
for (level = 0; level < s->wavelet_depth; level++)
for (i = 0; i < 4; i++) {