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wma: fix off-by-one in array bounds check.

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Ronald S. Bultje 2012-03-07 14:18:14 -08:00
parent 6eda85e15b
commit b4bccf3e4e
1 changed files with 1 additions and 1 deletions
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2
libavcodec/wmadec.c
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@ -356,7 +356,7 @@ static int decode_exp_vlc(WMACodecContext *s, int ch)
}
/* NOTE: this offset is the same as MPEG4 AAC ! */
last_exp += code - 60;
if ((unsigned)last_exp + 60 > FF_ARRAY_ELEMS(pow_tab)) {
if ((unsigned)last_exp + 60 >= FF_ARRAY_ELEMS(pow_tab)) {
av_log(s->avctx, AV_LOG_ERROR, "Exponent out of range: %d\n",
last_exp);
return -1;