From 416847d19593e87ee1704c26a9a638fd6b0d977c Mon Sep 17 00:00:00 2001
From: Vittorio Giovara <vittorio.giovara@gmail.com>
Date: Thu, 27 Feb 2014 12:06:15 +0100
Subject: [PATCH] vf_frei0r: prevent a segfault when filter parameters are not
 set

(cherry picked from commit 4e0be9c86f2003dd3ba2eb8fad01e8d0e538075e)
---
 libavfilter/vf_frei0r.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavfilter/vf_frei0r.c b/libavfilter/vf_frei0r.c
index 9c6b84b40b..670fa180c7 100644
--- a/libavfilter/vf_frei0r.c
+++ b/libavfilter/vf_frei0r.c
@@ -465,6 +465,10 @@ static int source_config_props(AVFilterLink *outlink)
         av_log(ctx, AV_LOG_ERROR, "Impossible to load frei0r instance");
         return AVERROR(EINVAL);
     }
+    if (!s->params) {
+        av_log(ctx, AV_LOG_ERROR, "frei0r filter parameters not set.\n");
+        return AVERROR(EINVAL);
+    }
 
     return set_params(ctx, s->params);
 }