linux-kernel - Re: [PATCHv7 0/3] Kernel Live Patching

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Message-ID: <alpine.LNX.2.00.1412170744560.1680@pobox.suse.cz>
Date:	Wed, 17 Dec 2014 07:46:09 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Balbir Singh <bsingharora@...il.com>
cc:	Seth Jennings <sjenning@...hat.com>,
	Josh Poimboeuf <jpoimboe@...hat.com>,
	Vojtech Pavlik <vojtech@...e.cz>,
	Steven Rostedt <rostedt@...dmis.org>,
	Petr Mladek <pmladek@...e.cz>, Miroslav Benes <mbenes@...e.cz>,
	Christoph Hellwig <hch@...radead.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Andy Lutomirski <luto@...capital.net>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	live-patching@...r.kernel.org, x86@...nel.org, kpatch@...hat.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv7 0/3] Kernel Live Patching

On Wed, 17 Dec 2014, Balbir Singh wrote:

> >> Could you describe what this does to signing? I presume the patched
> >> module should cause a taint on module signing?
> >
> > Hmm, why should it?
> 
> I wanted to clarify it from a different perspective
> 
> If the base image is signed by X and the patched module is signed by
> Y, is that supported. What does it imply in the case of live-patching?

Why should that matter? Both are signed by keys that kernel is configured 
to trust, which makes them equal (even though they are technically 
different).

-- 
Jiri Kosina
SUSE Labs
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