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Date: Wed, 20 Sep 2017 17:28:11 -0700
From: Dave Hansen <>
To: Tycho Andersen <>,
 Marco Benatto <>,
 Juerg Haefliger <>,
Subject: Re: [PATCH v6 03/11] mm, x86: Add support for eXclusive Page Frame
 Ownership (XPFO)

At a high level, does this approach keep an attacker from being able to
determine the address of data in the linear map, or does it keep them
from being able to *exploit* it?  Can you have a ret2dir attack if the
attacker doesn't know the address, for instance?

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