linux-kernel - Re: Firmware signing -- Re: [PATCH 00/27] security, efi: Add kernel lockdown

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Message-ID: <CA+55aFzrK29hbxoKs3GsvVUY4_uR7aBgZv2eeVyVq7MzfATY3w@mail.gmail.com>
Date:   Mon, 13 Nov 2017 14:09:10 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     David Howells <dhowells@...hat.com>
Cc:     Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        "AKASHI, Takahiro" <takahiro.akashi@...aro.org>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jan Blunck <jblunck@...radead.org>,
        Julia Lawall <julia.lawall@...6.fr>,
        Marcus Meissner <meissner@...e.de>, Gary Lin <GLin@...e.com>,
        LSM List <linux-security-module@...r.kernel.org>,
        linux-efi <linux-efi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Matthew Garrett <mjg59@...gle.com>
Subject: Re: Firmware signing -- Re: [PATCH 00/27] security, efi: Add kernel lockdown

On Mon, Nov 13, 2017 at 1:44 PM, David Howells <dhowells@...hat.com> wrote:
>
> Whilst that may be true, we either have to check signatures on every bit of
> firmware that the appropriate driver doesn't say is meant to be signed or not
> bother.

I vote for "not bother".

Seriously, if you have firmware in /lib/firmware, and you don't trust
it, what the hell are you doing?

Oh, it's one of those "let's protect people from themselves, so that
they can't possibly break Disney^W^W be terrorists - but but the
children" things again, isn't it?

Watch me care.

                  Linus