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>
13 years ago · 4fa706a4a6
parent efe1ba7201
commit 4fa706a4a6
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@ -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);