From a2fe33404146426e1a7690061969a6457a791670 Mon Sep 17 00:00:00 2001
From: deraadt <deraadt@openbsd.org>
Date: Fri, 15 Dec 1995 02:25:39 +0000
Subject: [PATCH] clamp maxproc to not exceed pt space

---
 sys/arch/mvme68k/mvme68k/pmap.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/sys/arch/mvme68k/mvme68k/pmap.c b/sys/arch/mvme68k/mvme68k/pmap.c
index d1bc4bf8819..8860f17b7b3 100644
--- a/sys/arch/mvme68k/mvme68k/pmap.c
+++ b/sys/arch/mvme68k/mvme68k/pmap.c
@@ -1,4 +1,4 @@
-/*	$Id: pmap.c,v 1.3 1995/11/28 20:43:19 deraadt Exp $ */
+/*	$Id: pmap.c,v 1.4 1995/12/15 02:25:39 deraadt Exp $ */
 
 /* 
  * Copyright (c) 1995 Theo de Raadt
@@ -474,7 +474,17 @@ bogons:
 	 * map where we want it.
 	 */
 	addr = M68K_PTBASE;
-	s = min(M68K_PTMAXSIZE, maxproc*M68K_MAX_PTSIZE);
+	if ((M68K_PTMAXSIZE / M68K_MAX_PTSIZE) < maxproc) {
+		s = M68K_PTMAXSIZE;
+		/*
+		 * XXX We don't want to hang when we run out of
+		 * page tables, so we lower maxproc so that fork()
+		 * will fail instead.  Note that root could still raise
+		 * this value via sysctl(2).
+		 */
+		maxproc = (M68K_PTMAXSIZE / M68K_MAX_PTSIZE);
+	} else
+		s = (maxproc * M68K_MAX_PTSIZE);
 	addr2 = addr + s;
 	rv = vm_map_find(kernel_map, NULL, 0, &addr, s, TRUE);
 	if (rv != KERN_SUCCESS)
-- 
2.20.1