[FFmpeg-cvslog] avfilter/vf_w3fdif: deny processing small videos

[Paul B Mahol]

ffmpeg | branch: release/4.2 | Paul B Mahol <onemda at gmail.com> | Fri Oct 11 12:55:13 2019 +0200| [e103a2cb9cd970f2c24525336057bccb2f3fcca3] | committer: Michael Niedermayer

avfilter/vf_w3fdif: deny processing small videos

Fixes #8243

(cherry picked from commit 0e68e8c93f9068596484ec8ba725586860e06fc8)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e103a2cb9cd970f2c24525336057bccb2f3fcca3
---

 libavfilter/vf_w3fdif.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavfilter/vf_w3fdif.c b/libavfilter/vf_w3fdif.c
index c6a6550778..b84052e8c7 100644
--- a/libavfilter/vf_w3fdif.c
+++ b/libavfilter/vf_w3fdif.c
@@ -274,6 +274,11 @@ static int config_input(AVFilterLink *inlink)
     s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
     s->planeheight[0] = s->planeheight[3] = inlink->h;
 
+    if (inlink->h < 3) {
+        av_log(ctx, AV_LOG_ERROR, "Video of less than 3 lines is not supported\n");
+        return AVERROR(EINVAL);
+    }
+
     s->nb_planes = av_pix_fmt_count_planes(inlink->format);
     s->nb_threads = ff_filter_get_nb_threads(ctx);
     s->work_line = av_calloc(s->nb_threads, sizeof(*s->work_line));