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From: John Baldwin <jhb@FreeBSD.org>
Date: Tue, 17 Nov 2009 16:51:49 +0000 (UTC)
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Subject: svn commit: r199410 - stable/6/lib/libkvm
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Author: jhb
Date: Tue Nov 17 16:51:49 2009
New Revision: 199410
URL: http://svn.freebsd.org/changeset/base/199410

Log:
  MFC 198986:
  Fix a copy-paste bug when reading data from the last 3 (7 for PAE) bytes of
  a page mapped by a large page in the kernel.

Modified:
  stable/6/lib/libkvm/kvm_i386.c
Directory Properties:
  stable/6/lib/libkvm/   (props changed)

Modified: stable/6/lib/libkvm/kvm_i386.c
==============================================================================
--- stable/6/lib/libkvm/kvm_i386.c	Tue Nov 17 16:51:38 2009	(r199409)
+++ stable/6/lib/libkvm/kvm_i386.c	Tue Nov 17 16:51:49 2009	(r199410)
@@ -289,9 +289,9 @@ _kvm_vatop(kvm_t *kd, u_long va, off_t *
 #define	PG_FRAME4M	(~PAGE4M_MASK)
 		pde_pa = ((u_long)pde & PG_FRAME4M) + (va & PAGE4M_MASK);
 		s = _kvm_pa2off(kd, pde_pa, &ofs);
-		if (s < sizeof pde) {
-			_kvm_syserr(kd, kd->program,
-			    "_kvm_vatop: pde_pa not found");
+		if (s == 0) {
+			_kvm_err(kd, kd->program,
+			    "_kvm_vatop: 4MB page address not in dump");
 			goto invalid;
 		}
 		*pa = ofs;
@@ -385,9 +385,9 @@ _kvm_vatop_pae(kvm_t *kd, u_long va, off
 #define	PG_FRAME2M	(~PAGE2M_MASK)
 		pde_pa = ((u_long)pde & PG_FRAME2M) + (va & PAGE2M_MASK);
 		s = _kvm_pa2off(kd, pde_pa, &ofs);
-		if (s < sizeof pde) {
-			_kvm_syserr(kd, kd->program,
-			    "_kvm_vatop_pae: pde_pa not found");
+		if (s == 0) {
+			_kvm_err(kd, kd->program,
+			    "_kvm_vatop: 2MB page address not in dump");
 			goto invalid;
 		}
 		*pa = ofs;