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motionpixels: clip VLC codes. 

Fixes invalid reads.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC:libav-stable@libav.org
This commit is contained in:
Anton Khirnov 2013-11-15 15:33:20 +01:00
parent 8b516f154a
commit ca41c72c6d
1 changed files with 1 additions and 0 deletions
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libavcodec/motionpixels.c
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@ -180,6 +180,7 @@ static int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
int i; int i;
i = (mp->codes_count == 1) ? 0 : get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1); i = (mp->codes_count == 1) ? 0 : get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1);
i = FFMIN(i, FF_ARRAY_ELEMS(mp->codes) - 1);
return mp->codes[i].delta; return mp->codes[i].delta;
} }