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Re: [Xen-devel] [for-xen-4.5 PATCH] Ignore non-zero data in unused xsave area.

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Don Koch <dkoch@xxxxxxxxxxx>
From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Date: Tue, 18 Nov 2014 16:36:31 +0000
Cc: Keir Fraser <keir@xxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, xen-devel@xxxxxxxxxxxxx
Delivery-date: Tue, 18 Nov 2014 16:37:43 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On 18/11/14 16:32, Konrad Rzeszutek Wilk wrote:
> On Tue, Nov 18, 2014 at 10:26:31AM -0500, Don Koch wrote:
>> If we restore an xsave area from an older xen that has a larger
>> size than the xcr0 bit call for, it is possible to have non-zero
>> data in the unused area if an xsave has ever been done that used

Do you mean "has never been done".

i.e. the non-zero data is actually Xen heap junk?

~Andrew

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References:
- [Xen-devel] [PATCH] Ignore non-zero data in unused xsave area.
  - From: Don Koch
- Re: [Xen-devel] [for-xen-4.5 PATCH] Ignore non-zero data in unused xsave area.
  - From: Konrad Rzeszutek Wilk

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