From 668673f10ce225d26a96f1aeb62066e8c641c85a Mon Sep 17 00:00:00 2001
From: Stefano Sabatini <stefano.sabatini-lala@poste.it>
Date: Thu, 11 Nov 2010 22:41:22 +0000
Subject: [PATCH] Add missing check on the existence of an associated output
 pad for each specified output link label.

Fix crash.

Originally committed as revision 25723 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavfilter/graphparser.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavfilter/graphparser.c b/libavfilter/graphparser.c
index 4266e8134d..99982b3727 100644
--- a/libavfilter/graphparser.c
+++ b/libavfilter/graphparser.c
@@ -294,6 +294,12 @@ static int parse_outputs(const char **buf, AVFilterInOut **curr_inputs,
         AVFilterInOut *match;
 
         AVFilterInOut *input = *curr_inputs;
+        if (!input) {
+            av_log(log_ctx, AV_LOG_ERROR,
+                   "No output pad can be associated to link label '%s'.\n",
+                   name);
+            return AVERROR(EINVAL);
+        }
         *curr_inputs = (*curr_inputs)->next;
 
         if (!name)