linux-kernel - Re: [PATCH RFC] mm: protect suid binaries against rowhammer with copy-on-read mappings

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Message-ID: <55099D9D.7000005@intel.com>
Date:	Wed, 18 Mar 2015 08:45:33 -0700
From:	Dave Hansen <dave.hansen@...el.com>
To:	Konstantin Khlebnikov <koct9i@...il.com>
CC:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andy Lutomirski <luto@...capital.net>
Subject: Re: [PATCH RFC] mm: protect suid binaries against rowhammer with
 copy-on-read mappings

On 03/18/2015 08:08 AM, Konstantin Khlebnikov wrote:
> It seems the only option is memory zoning: kernel should allocate all
> normal memory for userspace from isolated area which is kept far far
> away from important data.

Yeah, except that the kernel has a pretty hard time telling which data
is important.
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