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===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/netinet/udp_usrreq.c,v
retrieving revision 1.29
retrieving revision 1.29.2.1
diff -u -p -r1.29 -r1.29.2.1
--- src/sys/netinet/udp_usrreq.c	1996/05/20 16:56:20	1.29
+++ src/sys/netinet/udp_usrreq.c	1996/11/10 21:57:55	1.29.2.1
@@ -1,4 +1,4 @@
-/*	$NetBSD: udp_usrreq.c,v 1.29 1996/05/20 16:56:20 mrg Exp $	*/
+/*	$NetBSD: udp_usrreq.c,v 1.29.2.1 1996/11/10 21:57:55 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1982, 1986, 1988, 1990, 1993
@@ -462,6 +462,15 @@ udp_output(m, va_alist)
 	}
 
 	/*
+	 * Compute the packet length of the IP header, and
+	 * punt if the length looks bogus.
+	 */
+	if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
+		error = EMSGSIZE;
+		goto release;
+	}
+
+	/*
 	 * Fill in mbuf with extended UDP header
 	 * and addresses and length put into network format.
 	 */