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svq3: check the watermark height. 

Fixes division by 0

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-16 18:26:49 +02:00
parent efe1ba7201
commit 4fa706a4a6
1 changed files with 1 additions and 1 deletions
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2
libavcodec/svq3.c
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@ -906,7 +906,7 @@ static av_cold int svq3_decode_init(AVCodecContext *avctx)
int offset = (get_bits_count(&gb)+7)>>3;
uint8_t *buf;
if ((uint64_t)watermark_width*4 > UINT_MAX/watermark_height)
if (watermark_height<=0 || (uint64_t)watermark_width*4 > UINT_MAX/watermark_height)
return -1;
buf = av_malloc(buf_len);