xen-changelog

[Top] [All Lists]

[Xen-changelog] Ensure we only handle writable pagetable faults taken in

from [BitKeeper Bot]

[Permanent Link][Original]

To:	xen-changelog@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-changelog] Ensure we only handle writable pagetable faults taken in guest kernel
From:	BitKeeper Bot <riel@xxxxxxxxxxx>
Date:	Fri, 10 Jun 2005 14:35:32 +0000
Delivery-date:	Fri, 10 Jun 2005 15:03:54 +0000
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
List-help:	<mailto:xen-changelog-request@lists.xensource.com?subject=help>
List-id:	BK change log <xen-changelog.lists.xensource.com>
List-post:	<mailto:xen-changelog@lists.xensource.com>
List-subscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-changelog>, <mailto:xen-changelog-request@lists.xensource.com?subject=subscribe>
List-unsubscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-changelog>, <mailto:xen-changelog-request@lists.xensource.com?subject=unsubscribe>
Reply-to:	Xen Development List <xen-devel@xxxxxxxxxxxxxxxxxxx>
Sender:	xen-changelog-bounces@xxxxxxxxxxxxxxxxxxx

ChangeSet 1.1899, 2005/06/10 15:35:32+01:00, kaf24@xxxxxxxxxxxxxxxxxxxx

        Ensure we only handle writable pagetable faults taken in guest kernel
        mode.
        Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>



 traps.c |    1 +
 1 files changed, 1 insertion(+)


diff -Nru a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
--- a/xen/arch/x86/traps.c      2005-06-10 11:04:54 -04:00
+++ b/xen/arch/x86/traps.c      2005-06-10 11:04:54 -04:00
@@ -422,6 +422,7 @@
         }
 
         if ( (addr < PAGE_OFFSET) &&
+             !VM86_MODE(regs) && ((regs->cs & 3) == 1) && /* ring 1 */
              ((regs->error_code & 3) == 3) && /* write-protection fault */
              ptwr_do_page_fault(addr) )
         {

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog

[More with this subject...]

<Prev in Thread]	Current Thread	[Next in Thread>
[Xen-changelog] Ensure we only handle writable pagetable faults taken in guest kernel, BitKeeper Bot [Xen-changelog] Ensure we only handle writable pagetable faults taken in guest kernel, BitKeeper Bot <=

Previous by Date:	[Xen-changelog] Manual merge., BitKeeper Bot
Next by Date:	[Xen-changelog] xenstore fixes for read-only connections., BitKeeper Bot
Previous by Thread:	[Xen-changelog] Ensure we only handle writable pagetable faults taken in guest kernel, BitKeeper Bot
Next by Thread:	[Xen-changelog] Manual merge., BitKeeper Bot
Indexes:	[Date] [Thread] [Top] [All Lists]