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Subject: Re: [PATCH V3] mm: Add sysfs interface to dump each node's zonelist
 information
To: Anshuman Khandual <khandual@linux.vnet.ibm.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
References: <1473140072-24137-2-git-send-email-khandual@linux.vnet.ibm.com>
 <1473150666-3875-1-git-send-email-khandual@linux.vnet.ibm.com>
Cc: akpm@linux-foundation.org, Kees Cook <kees@outflux.net>
From: Dave Hansen <dave.hansen@intel.com>
Message-ID: <57CF28C5.3090006@intel.com>
Date: Tue, 6 Sep 2016 13:36:21 -0700
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On 09/06/2016 01:31 AM, Anshuman Khandual wrote:
> [NODE (0)]
>         ZONELIST_FALLBACK
>         (0) (node 0) (zone DMA c00000000140c000)
>         (1) (node 1) (zone DMA c000000100000000)
>         (2) (node 2) (zone DMA c000000200000000)
>         (3) (node 3) (zone DMA c000000300000000)
>         ZONELIST_NOFALLBACK
>         (0) (node 0) (zone DMA c00000000140c000)

Don't we have some prohibition on dumping out kernel addresses like this
so that attackers can't trivially defeat kernel layout randomization?