From 7f8d227938ce76eddcda230a476931c5d4d0559e Mon Sep 17 00:00:00 2001
From: Alan Cox <alc@FreeBSD.org>
Date: Tue, 10 Aug 1999 04:10:57 +0000
Subject: [PATCH] pmap_remove_pages: 	Add KASSERT to detect out of range
 access to the pv_table and 	report the errant pte before it's overwritten.

---
 sys/amd64/amd64/pmap.c | 5 ++++-
 sys/i386/i386/pmap.c   | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index bf78df855c9..aa51390a06f 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -39,7 +39,7 @@
  * SUCH DAMAGE.
  *
  *	from:	@(#)pmap.c	7.7 (Berkeley)	5/12/91
- *	$Id: pmap.c,v 1.243 1999/07/31 04:10:31 alc Exp $
+ *	$Id: pmap.c,v 1.244 1999/07/31 23:02:57 alc Exp $
  */
 
 /*
@@ -2967,6 +2967,9 @@ pmap_remove_pages(pmap, sva, eva)
 
 		ppv = pa_to_pvh(tpte);
 
+		KASSERT(ppv < &pv_table[pv_npg],
+			("pmap_remove_pages: bad tpte %x", tpte));
+
 		pv->pv_pmap->pm_stats.resident_count--;
 
 		/*
diff --git a/sys/i386/i386/pmap.c b/sys/i386/i386/pmap.c
index bf78df855c9..aa51390a06f 100644
--- a/sys/i386/i386/pmap.c
+++ b/sys/i386/i386/pmap.c
@@ -39,7 +39,7 @@
  * SUCH DAMAGE.
  *
  *	from:	@(#)pmap.c	7.7 (Berkeley)	5/12/91
- *	$Id: pmap.c,v 1.243 1999/07/31 04:10:31 alc Exp $
+ *	$Id: pmap.c,v 1.244 1999/07/31 23:02:57 alc Exp $
  */
 
 /*
@@ -2967,6 +2967,9 @@ pmap_remove_pages(pmap, sva, eva)
 
 		ppv = pa_to_pvh(tpte);
 
+		KASSERT(ppv < &pv_table[pv_npg],
+			("pmap_remove_pages: bad tpte %x", tpte));
+
 		pv->pv_pmap->pm_stats.resident_count--;
 
 		/*