Index: /trunk/src/VBox/Devices/Network/slirp/udp.c
===================================================================
--- /trunk/src/VBox/Devices/Network/slirp/udp.c	(revision 46607)
+++ /trunk/src/VBox/Devices/Network/slirp/udp.c	(revision 46608)
@@ -133,4 +133,5 @@
             udpstat.udps_badlen++;
             Log3(("NAT: IP(id: %hd) has bad size\n", ip->ip_id));
+            goto bad_free_mbuf;
         }
         m_adj(m, len - ip->ip_len);