fix potential null pointer deref when packets are forged

[project/mdnsd.git] / dns.c

diff --git a/dns.c b/dns.c
index ebef9ce..585b40f 100644 (file)
--- a/dns.c
+++ b/dns.c
@@ -380,11 +380,15 @@ dns_handle_packet(struct interface *iface, uint8_t *buffer, int len)
                return;
 
        while (h->answers-- > 0)
-               parse_answer(iface, buffer, len, &b, &rlen, 1);
+               if (parse_answer(iface, buffer, len, &b, &rlen, 1))
+                       return;
 
        while (h->authority-- > 0)
-               parse_answer(iface, buffer, len, &b, &rlen, 0);
+               if (parse_answer(iface, buffer, len, &b, &rlen, 1))
+                       return;
 
        while (h->additional-- > 0)
-               parse_answer(iface, buffer, len, &b, &rlen, 1);
+               if (parse_answer(iface, buffer, len, &b, &rlen, 1))
+                       return;
+
 }