Fix another issue with fixed strings.

src/lua/lua_http.c

@@ -273,6 +273,7 @@ static gint
 lua_http_request (lua_State *L)
 {
 	const gchar *url, *lua_body;
+	gchar *to_resolve;
 	gint cbref;
 	gsize bodylen;
 	struct event_base *ev_base;
@@ -460,17 +461,25 @@ lua_http_request (lua_State *L)
 	}
 	else {
 		if (task == NULL) {
+			to_resolve = g_malloc (msg->host->len + 1);
+			rspamd_strlcpy (to_resolve, msg->host->str, msg->host->len + 1);
+
 			if (!make_dns_request (resolver, session, NULL, lua_http_dns_handler, cbd,
 					RDNS_REQUEST_A, msg->host->str)) {
 				lua_http_maybe_free (cbd);
 				lua_pushboolean (L, FALSE);
+				g_free (to_resolve);
 
 				return 1;
 			}
+			
+			g_free (to_resolve);
 		}
 		else {
+			to_resolve = rspamd_mempool_fstrdup (task->task_pool, msg->host);
+
 			if (!make_dns_request_task (task, lua_http_dns_handler, cbd,
-					RDNS_REQUEST_A, msg->host->str)) {
+					RDNS_REQUEST_A, to_resolve)) {
 				lua_http_maybe_free (cbd);
 				lua_pushboolean (L, FALSE);