From 1dc42050185d63c1de5d16146fbaee92640af187 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Sun, 15 Jul 2012 11:16:53 +0200
Subject: lavfi: check all avfilter_ref_buffer() calls for errors.

---
 libavfilter/vf_overlay.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'libavfilter/vf_overlay.c')

diff --git a/libavfilter/vf_overlay.c b/libavfilter/vf_overlay.c
index 951ea7a4f6..14304c1918 100644
--- a/libavfilter/vf_overlay.c
+++ b/libavfilter/vf_overlay.c
@@ -213,6 +213,9 @@ static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref)
     AVFilterContext *ctx = inlink->dst;
     OverlayContext *over = ctx->priv;
 
+    if (!outpicref)
+        return AVERROR(ENOMEM);
+
     outpicref->pts = av_rescale_q(outpicref->pts, ctx->inputs[MAIN]->time_base,
                                   ctx->outputs[0]->time_base);
 
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