diff -Nru samba-3.4.17.orig/source3/include/proto.h samba-3.4.17/source3/include/proto.h
--- samba-3.4.17.orig/source3/include/proto.h	2012-04-28 19:01:42.000000000 +0200
+++ samba-3.4.17/source3/include/proto.h	2014-01-22 11:18:57.750108619 +0100
@@ -1431,6 +1431,8 @@
 		     const char *socket_name,
 		     mode_t dir_perms);
 const char *get_mydnsfullname(void);
+struct TALLOC_CTX;
+const char *get_mydnsfullname_talloc(struct TALLOC_CTX *ctx);
 bool is_myname_or_ipaddr(const char *s);
 
 /* The following definitions come from lib/util_str.c  */
diff -Nru samba-3.4.17.orig/source3/lib/util.c samba-3.4.17/source3/lib/util.c
--- samba-3.4.17.orig/source3/lib/util.c	2012-04-28 19:01:42.000000000 +0200
+++ samba-3.4.17/source3/lib/util.c	2014-01-22 11:31:44.577395455 +0100
@@ -1190,7 +1190,7 @@
 	const char *domname;
 	char *p;
 
-	domname = get_mydnsfullname();
+	domname = get_mydnsfullname_talloc(ctx);
 	if (!domname) {
 		return NULL;
 	}
diff -Nru samba-3.4.17.orig/source3/lib/util_sock.c samba-3.4.17/source3/lib/util_sock.c
--- samba-3.4.17.orig/source3/lib/util_sock.c	2012-04-28 19:01:42.000000000 +0200
+++ samba-3.4.17/source3/lib/util_sock.c	2014-01-22 11:14:55.242442841 +0100
@@ -1830,6 +1830,12 @@
 
 const char *get_mydnsfullname(void)
 {
+	return get_mydnsfullname_talloc(talloc_tos());
+}
+
+
+const char *get_mydnsfullname_talloc(struct TALLOC_CTX *ctx)
+{
 	struct addrinfo *res = NULL;
 	char my_hostname[HOST_NAME_MAX];
 	bool ret;
@@ -1886,7 +1892,7 @@
 	if (!memcache_lookup(NULL, SINGLETON_CACHE,
 			data_blob_string_const_null("get_mydnsfullname"),
 			&tmp)) {
-		tmp = data_blob_talloc(talloc_tos(), res->ai_canonname,
+		tmp = data_blob_talloc(ctx, res->ai_canonname,
 				strlen(res->ai_canonname) + 1);
 	}
 
diff -Nru samba-3.4.17.orig/source3/libsmb/ntlmssp.c samba-3.4.17/source3/libsmb/ntlmssp.c
--- samba-3.4.17.orig/source3/libsmb/ntlmssp.c	2012-04-28 19:01:42.000000000 +0200
+++ samba-3.4.17/source3/libsmb/ntlmssp.c	2014-01-22 11:10:53.023841427 +0100
@@ -573,7 +573,7 @@
 	}
 	strlower_m(dnsdomname);
 
-	dnsname = get_mydnsfullname();
+	dnsname = get_mydnsfullname_talloc(ntlmssp_state);
 	if (!dnsname) {
 		dnsname = "";
 	}
diff -Nru samba-3.4.17.orig/source3/utils/ntlm_auth.c samba-3.4.17/source3/utils/ntlm_auth.c
--- samba-3.4.17.orig/source3/utils/ntlm_auth.c	2012-04-28 19:01:42.000000000 +0200
+++ samba-3.4.17/source3/utils/ntlm_auth.c	2014-01-22 10:46:04.270661062 +0100
@@ -546,7 +546,7 @@
 		}
 		
 		if (memcmp(user_sess_key, zeros, 16) != 0) {
-			*user_session_key = data_blob(user_sess_key, 16);
+			*user_session_key = data_blob_talloc(ntlmssp_state, user_sess_key, 16);
 		}
 		ntlmssp_state->auth_context = talloc_strdup(ntlmssp_state,
 							    unix_name);