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Re: [Xen-devel] [PATCH 0/2] Xen/mem_event: Do not rely on the toolstack being bug-free

  • To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxx>
  • From: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
  • Date: Thu, 17 Jul 2014 17:40:13 +0300
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  • Delivery-date: Thu, 17 Jul 2014 14:39:16 +0000
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On 07/17/2014 04:10 PM, Andrew Cooper wrote:
> Xen performs insufficient validation of the contents of mem_event responses
> from the toolstack.  As a result, a buggy toolstack could cause Xen to walk
> off the end of a domain's vcpu list, and get out of sync with vcpu pause
> reference counts.
> These two fixes are compile tested only, as I have no way to plausibly test
> the mem-event functionality itself.

I've ran a few tests for our application (heavily based on mem_event),
and everything seems to work fine.

Hope this helps,
Razvan Cojocaru

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