linux-kernel - Re: RFC: sign the modules at install time

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Message-ID: <20121018005432.GA20163@kroah.com>
Date:	Wed, 17 Oct 2012 17:54:32 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	David Howells <dhowells@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	jwboyer@...hat.com, pjones@...hat.com
Subject: Re: RFC: sign the modules at install time

On Wed, Oct 17, 2012 at 03:44:28PM -0700, Linus Torvalds wrote:
> On Wed, Oct 17, 2012 at 3:19 PM, David Howells <dhowells@...hat.com> wrote:
> >
> > It's probably even better to just get rid of all the automatic module signing
> > stuff completely and leave the sign-file script for the builder to use
> > manually.  The module verification code will still be present.
> 
> That's just disgusting crazy talk.
> 
> Christ, David, get a grip on yourself. You seem to dismiss the "people
> want to build their own kernel" people entirely.
> 
> One of the main sane use-cases for module signing is:
> 
>  - CONFIG_CHECK_SIGNATURE=y
>  - randomly generated one-time key
>  - "make modules_install; make install"
>  - "make clean" to get rid of the keys.
>  - reboot.

I want that too, but right now 'make clean' leaves the keys around,
which seems a bit dangerous to me.

David, why aren't the keys cleaned up as well?  Was that on purpose or
just an oversight?

thanks,

greg k-h
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