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

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Message-ID: <87txtrpb1t.fsf@rustcorp.com.au>
Date:	Fri, 19 Oct 2012 10:50:30 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Josh Boyer <jwboyer@...hat.com>
Cc:	David Howells <dhowells@...hat.com>,
	David Miller <davem@...emloft.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	pjones@...hat.com
Subject: Re: RFC: sign the modules at install time

Linus Torvalds <torvalds@...ux-foundation.org> writes:
> So signing is the nice flexible option, and technically the right
> thing to do.

Meh.... It's 52k of extra text to get that 'nice flexible'; 1% of my
kernel image.  That's a lot of bug free code.

> (Side note: I hope people realize that the random key is generated
> with a 100-year lifespan. So if you build a kernel today, you do
> potentially have a "year-2112 problem". I'm not horribly worried, but
> I *am* a bit worried about 32-bit time_t overflow and I hope 32-bit
> openssl doesn't do anything odd)

Yep, David's original patch had that problem; he fixed the kernel's x509
handling to use struct tm, not time_t, and now it Just Works.

Cheers,
Rusty.
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