From 706286c28956e51873bfe6b673bea5be01ee7839 Mon Sep 17 00:00:00 2001
From: "Daniel J. Hofmann" <daniel@trvx.org>
Date: Sat, 10 May 2014 16:01:44 +0200
Subject: [PATCH] Fixes use-after-free issue.

Calling writer() might fail in which case launch_buff gets freed.
This patch prevents the subsequent use of memory after it was freed.
---
 mimedb.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mimedb.cpp b/mimedb.cpp
index 0a4106b24..bbc29227f 100644
--- a/mimedb.cpp
+++ b/mimedb.cpp
@@ -1190,6 +1190,12 @@ static void launch(char *filter, const string_list_t &files, size_t fileno)
             writer('&');
             writer('\0');
 
+            /*
+              Calling writer might fail in which case launch_buff gets freed.
+            */
+            if (error)
+                return;
+
             if (system(launch_buff) == -1)
             {
                 fprintf(stderr, _(ERROR_SYSTEM), MIMEDB, launch_buff);