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avcodec/dxa: check dimensions 

Fixes out of array access
Fixes: asan_heap-oob_11222fb_21_020.dxa
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit e70312dfc2)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-10-28 15:26:42 +01:00
parent 3f3e5f8f60
commit c7b7e0790c
1 changed files with 5 additions and 0 deletions
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5
libavcodec/dxa.c
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@ -329,6 +329,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
{
DxaDecContext * const c = avctx->priv_data;
if (avctx->width%4 || avctx->height%4) {
avpriv_request_sample(avctx, "dimensions are not a multiple of 4");
return AVERROR_INVALIDDATA;
}
c->prev = av_frame_alloc();
if (!c->prev)
return AVERROR(ENOMEM);