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Re: [Xen-users] x86 sinkhole exploit

To: Sarah Newman <srn@xxxxxxxxx>
From: George Dunlap <dunlapg@xxxxxxxxx>
Date: Mon, 10 Aug 2015 11:49:42 +0100
Cc: "xen-users@xxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxx>
Delivery-date: Mon, 10 Aug 2015 10:50:15 +0000
List-id: Xen user discussion <xen-users.lists.xen.org>

On Fri, Aug 7, 2015 at 7:10 AM, Sarah Newman <srn@xxxxxxxxx> wrote:
> I've read https://github.com/xoreaxeaxeax/sinkhole/blob/master/sinkhole.asm 
> and it depends on wrmsr being usable with ecx = MSR_IA32_APICBASE. It
> looks like xen will reject this call even if made by the dom0. Is that 
> correct?

Also, for this kind of deeply technical question it's probably a good
idea to mail xen-devel in the future to get better answers more
quickly. :-)

 -George

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References:
- [Xen-users] x86 sinkhole exploit
  - From: Sarah Newman

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