Index: tty.c
===================================================================
RCS file: /cognet/ncvs/src/sys/kern/tty.c,v
retrieving revision 1.270
diff -u -p -r1.270 tty.c
--- tty.c	10 Jun 2007 01:49:17 -0000	1.270
+++ tty.c	10 Jun 2007 13:15:52 -0000
@@ -2614,8 +2614,10 @@ ttyinfo(struct tty *tp)
 		rss = pgtok(vmspace_resident_count(pick->p_vmspace));
 	PROC_SUNLOCK(pick);
 	PROC_LOCK(pick);
+	PROC_SLOCK(pick);
 	PGRP_UNLOCK(tp->t_pgrp);
 	calcru(pick, &utime, &stime);
+	PROC_SUNLOCK(pick);
 	pid = pick->p_pid;
 	bcopy(pick->p_comm, comm, sizeof(comm));
 	PROC_UNLOCK(pick);