From: "Henrique de Moraes Holschuh" <hmh@hmh.eng.br>
To: "Andi Kleen" <andi@firstfloor.org>
Cc: "Robert Hancock" <hancockrwd@gmail.com>,
"Anton D. Kachalov" <mouse@mayc.ru>,
linux-kernel@vger.kernel.org
Subject: Re: Reading /dev/mem by dd
Date: Thu, 12 Nov 2009 15:37:34 -0200 [thread overview]
Message-ID: <1258047454.16197.1344913359@webmail.messagingengine.com> (raw)
In-Reply-To: <878web7kwf.fsf@basil.nowhere.org>
On Thu, 12 Nov 2009 17:44 +0100, "Andi Kleen" <andi@firstfloor.org> wrote:
> Henrique de Moraes Holschuh <hmh@hmh.eng.br> writes:
> > IMO: if you're going to provide /dev/mem, make it as safe as
> > possible.
>
> That would also make it useless for people who want to access MMIO
> using /dev/mem. Which is a lot of programs.
In this case, the problem seems to be access over /dev/mem to stuff the
kernel is already taking care of. Certainly "as safe as possible" does
not have to mean making /dev/mem useless for whatever good uses it has.
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
next prev parent reply other threads:[~2009-11-12 17:37 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-11 14:36 Reading /dev/mem by dd Anton D. Kachalov
2009-11-11 16:20 ` Américo Wang
2009-11-12 15:46 ` Anton D. Kachalov
2009-11-11 21:09 ` Robert Hancock
2009-11-12 2:12 ` Henrique de Moraes Holschuh
2009-11-12 11:09 ` Alan Cox
2009-11-12 16:06 ` Henrique de Moraes Holschuh
2009-11-12 17:52 ` Alan Cox
2009-11-12 16:44 ` Andi Kleen
2009-11-12 17:37 ` Henrique de Moraes Holschuh [this message]
2009-11-12 17:49 ` Alan Cox
2009-11-12 17:57 ` Henrique de Moraes Holschuh
2009-11-12 18:13 ` Alan Cox
2009-11-12 20:02 ` Henrique de Moraes Holschuh
2009-11-12 20:06 ` Alan Cox
2009-11-12 21:07 ` Krzysztof Halasa
2009-11-12 21:29 ` Cyrill Gorcunov
-- strict thread matches above, loose matches on Subject: below --
2010-02-16 8:35 Nameer Yarkon
2010-02-16 8:41 ` Andi Kleen
2010-02-16 9:03 ` Nameer Yarkon
2010-02-16 12:31 ` Alan Cox
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