From 80713a93debbd34e2a5a0e2507d30c61a2380823 Mon Sep 17 00:00:00 2001
From: Marcin Wisnicki <mwisnicki@gmail.com>
Date: Mon, 28 May 2012 00:32:10 -0600
Subject: [PATCH] Bug 3545: FreeBSD dnsserver segfaults

---
 src/dnsserver.cc | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/dnsserver.cc b/src/dnsserver.cc
index 6ad1771176..e2ba764a01 100644
--- a/src/dnsserver.cc
+++ b/src/dnsserver.cc
@@ -194,8 +194,10 @@ lookup(const char *buf)
     const bool isDomain = (getaddrinfo(buf,NULL,&hints,&AI) != 0);
 
     // reset for real lookup
-    freeaddrinfo(AI);
-    AI = NULL;
+    if (AI != NULL) {
+        freeaddrinfo(AI);
+        AI = NULL;
+    }
 
     // resolve the address/name
     memset(&hints, '\0', sizeof(struct addrinfo));
@@ -331,7 +333,8 @@ lookup(const char *buf)
         printf("$fail A system error occured looking up Domain/IP '%s': %s.\n", buf, gai_strerror(res));
     }
 
-    freeaddrinfo(AI);
+    if (AI != NULL)
+        freeaddrinfo(AI);
 }
 
 /**
@@ -432,7 +435,8 @@ squid_res_setservers(int reset)
         fprintf(stderr, "IPv6 nameservers not supported on this resolver\n");
 #endif
     }
-    freeaddrinfo(AI);
+    if (AI != NULL)
+        freeaddrinfo(AI);
 
 #else /* !HAVE_RES_INIT || !defined(_SQUID_RES_NSADDR_LIST) */
 
-- 
2.47.2