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

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Message-ID: <CA+55aFxo-b3nUAWhG0N7hJkH1goStvBBTCT7XWGD+RJLG0=fsQ@mail.gmail.com>
Date:	Wed, 17 Oct 2012 20:14:31 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	David Howells <dhowells@...hat.com>,
	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 5:54 PM, Greg KH <gregkh@...uxfoundation.org> wrote:
>>
>> 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.

Oh, yes, we should make sure the key file gets cleaned up at "make clean".

I have to admit that I never do the whole "make clean/distclean" any
more, I have gotten so used to just going

    git clean -dqfx

to get rid of all generated files in a git directory that I no longer
depend on the makefile getting it right for me.

                  Linus
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