linux-kernel - Re: [PATCH V3] mm: Add sysfs interface to dump each node's zonelist information

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Message-ID: <57CF28C5.3090006@intel.com>
Date:   Tue, 6 Sep 2016 13:36:21 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Cc:     akpm@...ux-foundation.org, Kees Cook <kees@...flux.net>
Subject: Re: [PATCH V3] mm: Add sysfs interface to dump each node's zonelist
 information

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?