diff -r 27580a47ae28 -r 9eb8f52893d0 libpurple/dnssrv.c
--- a/libpurple/dnssrv.c	Sun May 11 22:31:38 2014 +0200
+++ b/libpurple/dnssrv.c	Tue May 13 00:26:43 2014 +0200
@@ -555,6 +555,14 @@
 							responses = NULL;
 							break;
 						}
+						if (len > MAX_ADDR_RESPONSE_LEN) {
+							purple_debug_error("dnssrv", "we've read invalid number\n");
+							size = 0;
+							g_list_foreach(responses, (GFunc)purple_txt_response_destroy, NULL);
+							g_list_free(responses);
+							responses = NULL;
+							break;
+						}
 
 						res = g_new0(PurpleTxtResponse, 1);
 						res->content = g_new0(gchar, len);