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wmalosslessdec: make MCLMS arrays big enough for what is written into them.

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Fixes a part of CVE-2012-2795

CC:libav-stable@libav.org

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Michael Niedermayer 2012-04-14 14:49:22 +02:00 • committed by Anton Khirnov
parent ae3da0ae55
commit 607f57152c
1 changed files with 2 additions and 2 deletions
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4
libavcodec/wmalosslessdec.c
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@ -129,8 +129,8 @@ typedef struct WmallDecodeCtx {
int8_t mclms_scaling;
int16_t mclms_coeffs[128];
int16_t mclms_coeffs_cur[4];
int16_t mclms_prevvalues[64];
int16_t mclms_updates[64];
int16_t mclms_prevvalues[WMALL_MAX_CHANNELS * 2 * 32];
int16_t mclms_updates[WMALL_MAX_CHANNELS * 2 * 32];
int mclms_recent;
int movave_scaling;