linux-kernel - Re: [PATCH v4 1/5] pagemap: check permissions and capabilities at open time

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Message-ID: <CAEVpBaKsFLRx-tfy_zC-3Yqp++wKMKjULEKN-Mq5mnZK2bjS1Q@mail.gmail.com>
Date:	Fri, 24 Jul 2015 19:16:39 +0100
From:	Mark Williamson <mwilliamson@...o-software.com>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:	Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>
Subject: Re: [PATCH v4 1/5] pagemap: check permissions and capabilities at
 open time

(within the limits of my understanding of the mm code)
Reviewed-by: Mark Williamson <mwilliamson@...o-software.com>

On Tue, Jul 21, 2015 at 9:06 AM, Naoya Horiguchi
<n-horiguchi@...jp.nec.com> wrote:
> On Tue, Jul 14, 2015 at 06:37:35PM +0300, Konstantin Khlebnikov wrote:
>> This patch moves permission checks from pagemap_read() into pagemap_open().
>>
>> Pointer to mm is saved in file->private_data. This reference pins only
>> mm_struct itself. /proc/*/mem, maps, smaps already work in the same way.
>>
>> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
>> Link: http://lkml.kernel.org/r/CA+55aFyKpWrt_Ajzh1rzp_GcwZ4=6Y=kOv8hBz172CFJp6L8Tg@mail.gmail.com
>
> Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
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