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vqavideodev: Check image dimensions 

Fixes out of heap array read

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-03-22 23:43:37 +01:00
parent 464cef4c14
commit 3583c8706d
1 changed files with 5 additions and 0 deletions
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5
libavcodec/vqavideo.c
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@ -164,6 +164,11 @@ static av_cold int vqa_decode_init(AVCodecContext *avctx)
if (!s->next_codebook_buffer)
goto fail;
if (s->width % s->vector_width || s->height % s->vector_height) {
av_log(avctx, AV_LOG_ERROR, "Picture dimensions are not a multiple of the vector size\n");
goto fail;
}
/* allocate decode buffer */
s->decode_buffer_size = (s->width / s->vector_width) *
(s->height / s->vector_height) * 2;