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avcodec/avrndec: Use the AVFrame format instead of the context

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Fixes out of array read
Fixes: 20dd01398dee0f6d83d7e5410a2ae8eb/signal_sigsegv_39eeb1f_4001_62efbdf1c60748dabf1ec310b59525fd.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-11-14 13:04:54 +01:00
parent 6f520ce1a6
commit ccba8aaff2
1 changed files with 1 additions and 1 deletions
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2
libavcodec/avrndec.c
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@ -113,7 +113,7 @@ static int decode_frame(AVCodecContext *avctx, void *data,
int shift = p->height - avctx->height;
int subsample_h, subsample_v;
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &subsample_h, &subsample_v);
av_pix_fmt_get_chroma_sub_sample(p->format, &subsample_h, &subsample_v);
p->data[0] += p->linesize[0] * shift;
if (p->data[2]) {