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[Xen-devel] Re: DOMID_XEN and iomem_access_permitted

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>
Subject: [Xen-devel] Re: DOMID_XEN and iomem_access_permitted
From: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Date: Wed, 12 May 2010 15:55:57 -0500
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Keir Fraser wrote:
Unprivileged domains will be unable to obtain a reference to dom_xen. So
this bug can only trigger from dom0.
OK -- and DOMID_IO redirects the checks back to current->domain before calling iomem_access_permitted() in get_page_from_l1e(). So we don't believe a domU should be able to pass a "dummy domain" to iomem_access_permitted(). Good to know. :-)


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