===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/w/w.c,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- src/usr.bin/w/w.c	1996/04/21 23:44:48	1.2
+++ src/usr.bin/w/w.c	1996/05/30 09:11:27	1.3
@@ -166,6 +166,13 @@
 	argc -= optind;
 	argv += optind;
 
+	/*
+	 * Discard setgid privileges if not the running kernel so that bad
+	 * guys can't print interesting stuff from kernel memory.
+	 */
+	if (nlistf != NULL || memf != NULL)
+		setgid(getgid());
+
 	if ((kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf)) == NULL)
 		errx(1, "%s", errbuf);