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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)

Conflicts:

	libavcodec/dxa.c

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-10-28 15:26:42 +01:00
parent 27d82d8374
commit 017226fdf9
1 changed files with 5 additions and 0 deletions
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5
libavcodec/dxa.c
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@ -301,6 +301,11 @@ static av_cold int decode_init(AVCodecContext *avctx)
c->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
if (avctx->width%4 || avctx->height%4) {
av_log(avctx, AV_LOG_ERROR, "dimensions are not a multiple of 4");
return AVERROR_INVALIDDATA;
}
avcodec_get_frame_defaults(&c->pic);
avcodec_get_frame_defaults(&c->prev);