linux-kernel - Re: [PATCH] dmi: export dmi data through debugfs

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Message-ID: <20100929145330.GA9351@lixom.net>
Date:	Wed, 29 Sep 2010 09:53:30 -0500
From:	Olof Johansson <olof@...om.net>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH] dmi: export dmi data through debugfs

On Wed, Sep 29, 2010 at 09:34:03AM +0200, Jean Delvare wrote:
> Hi Olaf,
> 
> On Tue, 28 Sep 2010 16:12:46 -0500, Olof Johansson wrote:
> > I've found this quite useful since it allows dmidecode to run without
> > root privileges using --from-dump to read this file instead
> 
> This is a bad idea. We do NOT want every user to have access to all the
> DMI information. There is sensitive information in there (serial
> numbers and UUIDs, and possibly even more sensitive data in
> OEM-specific records.) If you look in /sys/class/dmi/id/, you'll see
> that files board_serial, chassis_serial, product_serial and
> product_uuid are only readable by root exactly for this reason.

> So this is a NACK from me, sorry.

So how about a change to mode 0400 on the debugfs file then? It's
still better than having a userspace tool dig around /dev/mem for the
information.


-Olof
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