lavfi: check all avfilter_ref_buffer() calls for errors.

1 files changed, 6 insertions, 1 deletions

diff --git a/libavfilter/video.c b/libavfilter/video.c
index 8dd5bf4272..6e5063778a 100644
--- a/libavfilter/video.c
+++ b/libavfilter/video.c
@@ -176,12 +176,17 @@ static int default_start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
         outlink = inlink->dst->outputs[0];
 
     if (outlink) {
+        AVFilterBufferRef *buf_out;
         outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
         if (!outlink->out_buf)
             return AVERROR(ENOMEM);
 
         avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
-        return ff_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
+        buf_out = avfilter_ref_buffer(outlink->out_buf, ~0);
+        if (!buf_out)
+            return AVERROR(ENOMEM);
+
+        return ff_start_frame(outlink, buf_out);
     }
     return 0;
 }