Index: head/usr.sbin/cron/cron/cron.c
===================================================================
--- head/usr.sbin/cron/cron/cron.c	(revision 199240)
+++ head/usr.sbin/cron/cron/cron.c	(working copy)
@@ -24,6 +24,7 @@
 
 
 #include "cron.h"
+#include <sys/mman.h>
 #include <sys/signal.h>
 #if SYS_TIME_H
 # include <sys/time.h>
@@ -134,6 +135,9 @@
 		}
 	}
 
+	if (madvise(NULL, 0, MADV_PROTECT) != 0)
+		log_it("CRON", getpid(), "WARNING", "madvise() failed");
+
 	pidfile_write(pfh);
 	database.head = NULL;
 	database.tail = NULL;
Index: head/usr.sbin/inetd/inetd.c
===================================================================
--- head/usr.sbin/inetd/inetd.c	(revision 199240)
+++ head/usr.sbin/inetd/inetd.c	(working copy)
@@ -110,6 +110,7 @@
  */
 #include <sys/param.h>
 #include <sys/ioctl.h>
+#include <sys/mman.h>
 #include <sys/wait.h>
 #include <sys/time.h>
 #include <sys/resource.h>
@@ -497,6 +498,9 @@
 		}
 	}
 
+	if (madvise(NULL, 0, MADV_PROTECT) != 0)
+		syslog(LOG_WARNING, "madvise() failed: %s", strerror(errno));
+
 	for (i = 0; i < PERIPSIZE; ++i)
 		LIST_INIT(&proctable[i]);