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Re: [Xen-devel] [PATCH for-4.11 v2 0/3] x86: XSA-267 follow-up


  • To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Juergen Gross <jgross@xxxxxxxx>
  • Date: Tue, 26 Jun 2018 09:39:41 +0200
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  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Delivery-date: Tue, 26 Jun 2018 07:39:47 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 26/06/18 08:24, Jan Beulich wrote:
> The first patch alone should be sufficient to address an issue with the
> XSA-267 changes, causing a BUG_ON() to be triggered. The other two
> patches would, afaict, each individually also have avoided the issue,
> hence I'm also including them here. While the first patch obviously is
> a strong candidate for 4.11, the latter two are candidates too imo; at
> least I consider them backporting candidates (albeit, to be clear, patch
> 2 is useful only as far back as we have exception recovery attached
> to emulator stubs, i.e. no farther than 4.9).
> 
> 1: x86/HVM: don't cause #NM to be raised in Xen
> 2: x86: guard against #NM
> 3: VMX: check host CR0 before entering guest

For the series:

Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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