Index: lib/libc/net/getaddrinfo.c
===================================================================
--- lib/libc/net/getaddrinfo.c	(revision 326933)
+++ lib/libc/net/getaddrinfo.c	(working copy)
@@ -1277,7 +1277,8 @@
 		 * does not accept.  So we need to separate the case for
 		 * AF_INET.
 		 */
-		if (inet_aton(hostname, (struct in_addr *)pton) != 1)
+		if (inet_aton(hostname, (struct in_addr *)pton) != 1 ||
+		    hostname[strspn(hostname, "0123456789.xabcdefXABCDEF")] != '\0')
 			return 0;
 		p = pton;
 		break;