From 987b847efc496b1c9eca46c908bdfe613f0557b3 Mon Sep 17 00:00:00 2001
From: Jonathan Lemon <jlemon@FreeBSD.org>
Date: Fri, 12 Sep 1997 15:58:47 +0000
Subject: [PATCH] Do not consider VM_PROT_OVERRIDE_WRITE to be part of the
 protection entry when handling a fault.  This is set by procfs whenever it
 wants to write to a page, as a means of overriding `r-x COW' entries, but
 causes failures in the `rwx' case.

Submitted by:	 bde
---
 sys/vm/vm_map.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c
index d2e9f4b8b73..1b7e1acaa77 100644
--- a/sys/vm/vm_map.c
+++ b/sys/vm/vm_map.c
@@ -61,7 +61,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- * $Id: vm_map.c,v 1.88 1997/08/25 22:15:22 bde Exp $
+ * $Id: vm_map.c,v 1.89 1997/09/01 03:17:18 bde Exp $
  */
 
 /*
@@ -2287,7 +2287,8 @@ RetryLookup:;
 	if ((fault_type & VM_PROT_OVERRIDE_WRITE) == 0 ||
 		(entry->eflags & MAP_ENTRY_COW) == 0 ||
 		(entry->wired_count != 0)) {
-		if ((fault_type & (prot)) != fault_type)
+		if ((fault_type & (prot)) !=
+		    (fault_type & ~VM_PROT_OVERRIDE_WRITE))
 			RETURN(KERN_PROTECTION_FAILURE);
 	}