From f4d6143427edead6c65c091be9e07ad67cc0301e Mon Sep 17 00:00:00 2001
From: Keith Bostic <bostic@ucbvax.Berkeley.EDU>
Date: Mon, 28 Mar 1994 15:07:28 -0800
Subject: [PATCH] fix address bounds check From: ralphc@pyramid.com (Ralph
 Campbell)

SCCS-vsn: sys/pmax/pmax/mem.c 8.2
---
 usr/src/sys/pmax/pmax/mem.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/usr/src/sys/pmax/pmax/mem.c b/usr/src/sys/pmax/pmax/mem.c
index dc74a49593..a921a1642e 100644
--- a/usr/src/sys/pmax/pmax/mem.c
+++ b/usr/src/sys/pmax/pmax/mem.c
@@ -11,7 +11,7 @@
  *
  * from: Utah $Hdr: mem.c 1.14 90/10/12$
  *
- *	@(#)mem.c	8.1 (Berkeley) %G%
+ *	@(#)mem.c	8.2 (Berkeley) %G%
  */
 
 /*
@@ -59,10 +59,11 @@ mmrw(dev, uio, flags)
 		case 0:
 			v = (u_long)uio->uio_offset;
 			c = iov->iov_len;
-			if (v + c >= physmem)
+			if (v + c <= btoc(physmem))
+				v += MACH_CACHED_MEMORY_ADDR;
+			else
 				return (EFAULT);
-			error = uiomove((caddr_t)(MACH_CACHED_MEMORY_ADDR + v),
-				(int)c, uio);
+			error = uiomove((caddr_t)v, (int)c, uio);
 			continue;
 
 /* minor device 1 is kernel memory */
-- 
2.20.1