From e6a09e68f6d8b9c63adf8206777495dc3cd2a8b1 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@cs.stanford.edu>
Date: Sat, 18 Sep 2004 17:33:18 +0000
Subject: [PATCH] Only destroy pages up to PHYS_BASE.

---
 src/userprog/pagedir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/userprog/pagedir.c b/src/userprog/pagedir.c
index 1bad9b2..39a8f0a 100644
--- a/src/userprog/pagedir.c
+++ b/src/userprog/pagedir.c
@@ -19,7 +19,7 @@ pagedir_destroy (uint32_t *pd)
 {
   uint32_t *pde;
 
-  for (pde = pd; pde < pd + PGSIZE / sizeof *pde; pde++)
+  for (pde = pd; pde < pd + pd_no (PHYS_BASE); pde++)
     if (*pde & PG_P) 
       {
         uint32_t *pt = pde_get_pt (*pde);
-- 
2.30.2