linux-kernel - Re: [PATCH RFC 0/4] Add firmware signature file check

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Message-ID: <CACVXFVOEagv_BgZCTzEgRSpaHEiM6ptNuXAePUaXDb8GfRogSw@mail.gmail.com>
Date:	Tue, 6 Nov 2012 19:03:58 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, joeyli <jlee@...e.com>,
	Jiri Kosina <jkosina@...e.cz>,
	David Howells <dhowells@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-efi@...r.kernel.org
Subject: Re: [PATCH RFC 0/4] Add firmware signature file check

On Tue, Nov 6, 2012 at 6:53 PM, Takashi Iwai <tiwai@...e.de> wrote:
> At Tue, 6 Nov 2012 18:40:57 +0800,
>> It is true if all firmwares are signed on safe boot. If firmware is allowed
>> to be loaded from network or other non-fs place in secure distribution,
>> your patch will break this loading.
>
> Do we already have such a secure mechanism?  How is the security
> assured?

I don't know, and my comments are just on your patch and the condition.
I understand secure guys should know if the condition may be true or false, :-)

>> The clue can be found from debug message.
>
> Debug messages are turned off on normal machines, unfortunately.

Kernel guys will put one eye on bug report, also enabling udev log
can help the problem too.


Thanks,
-- 
Ming Lei
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