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yop: check for missing extradata

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Fixes null ptr deref
Fixes Ticket1361

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-05-28 17:08:06 +02:00
parent 01900fcc45
commit 77a4c8b959
1 changed files with 5 additions and 0 deletions
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5
libavcodec/yop.c
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@ -89,6 +89,11 @@ static av_cold int yop_decode_init(AVCodecContext *avctx)
return -1;
}
if (!avctx->extradata) {
av_log(avctx, AV_LOG_ERROR, "extradata missing\n");
return AVERROR_INVALIDDATA;
}
avctx->pix_fmt = PIX_FMT_PAL8;
avcodec_get_frame_defaults(&s->frame);