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avcodec/dcadec: Check active_bands

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Fixes CID1297594 part2

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit fc624ec9ba)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-05-15 18:29:40 +02:00
parent ba82b23a1d
commit 228f7c7eed
1 changed files with 6 additions and 1 deletions
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7
libavcodec/dcadec.c
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@ -1823,8 +1823,13 @@ static int dca_xbr_parse_frame(DCAContext *s)
for(i = 0; i < num_chsets; i++) {
n_xbr_ch[i] = get_bits(&s->gb, 3) + 1;
k = get_bits(&s->gb, 2) + 5;
for(j = 0; j < n_xbr_ch[i]; j++)
for(j = 0; j < n_xbr_ch[i]; j++) {
active_bands[i][j] = get_bits(&s->gb, k) + 1;
if (active_bands[i][j] > DCA_SUBBANDS) {
av_log(s->avctx, AV_LOG_ERROR, "too many active subbands (%d)\n", active_bands[i][j]);
return AVERROR_INVALIDDATA;
}
}
}
/* skip to the end of the header */