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yadif: check input video size.

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yadif needs at least 3x3 or it will likely crash with out of array reads

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2012-08-10 00:09:34 +02:00
parent 8f29901b54
commit a0d15027e3
1 changed files with 5 additions and 0 deletions
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5
libavfilter/vf_yadif.c
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@@ -221,6 +221,11 @@ static int start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
av_assert0(picref); av_assert0(picref);
if (picref->video->h < 3 || picref->video->w < 3) {
av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
return AVERROR(EINVAL);
}
if (yadif->frame_pending) if (yadif->frame_pending)
return_frame(ctx, 1); return_frame(ctx, 1);