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svq3: Avoid a division by zero

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If the height is zero, the decompression will probably end up
failing due to not fitting into the allocated buffer later
anyway, so this doesn't need any more elaborate check.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-09-19 15:58:59 +03:00
parent 7a5a557227
commit 601c2015bc
1 changed files with 2 additions and 1 deletions
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3
libavcodec/svq3.c
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@ -980,7 +980,8 @@ 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);