[FFmpeg-cvslog] yadif: check input video size.

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Aug 10 00:09:34 2012 +0200| [a0d15027e3b0c7825cc10052363b72e9398578b9] | committer: Michael Niedermayer

yadif: check input video size.

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

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a0d15027e3b0c7825cc10052363b72e9398578b9
---

 libavfilter/vf_yadif.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavfilter/vf_yadif.c b/libavfilter/vf_yadif.c
index d25c7b1..f200cb1 100644
--- a/libavfilter/vf_yadif.c
+++ b/libavfilter/vf_yadif.c
@@ -221,6 +221,11 @@ static int start_frame(AVFilterLink *link, AVFilterBufferRef *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)
         return_frame(ctx, 1);