Add safe checks to validate DNS buffer

Invalid buffer details while parsing DNS rsp data

diff --git a/gweb/gresolv.c b/gweb/gresolv.c
index 864d2ad..74467f2 100644 (file)
--- a/gweb/gresolv.c
+++ b/gweb/gresolv.c
@@ -665,7 +665,12 @@ static void parse_response(struct resolv_nameserver *nameserver,
 
        debug(resolv, "response from %s", nameserver->address);
 
+#if defined TIZEN_EXT
+       if (ns_initparse(buf, len, &msg) == -1)
+               return;
+#else
        ns_initparse(buf, len, &msg);
+#endif
 
        list = g_queue_find_custom(resolv->query_queue,
                        GUINT_TO_POINTER(ns_msg_id(msg)), compare_query_msgid);
@@ -713,7 +718,12 @@ static void parse_response(struct resolv_nameserver *nameserver,
                lookup->ipv4_status = status;
 
        for (i = 0; i < count; i++) {
+#if defined TIZEN_EXT
+               if (ns_parserr(&msg, ns_s_an, i, &rr) == -1)
+                       continue;
+#else
                ns_parserr(&msg, ns_s_an, i, &rr);
+#endif
 
                if (ns_rr_class(rr) != ns_c_in)
                        continue;