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

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Message-ID: <CAKTCnzkkxTDO_CST79YHuKQF_xOFAA4LCZjsRSO1bcM7B3qgBw@mail.gmail.com>
Date:	Wed, 17 Dec 2014 09:12:09 +0530
From:	Balbir Singh <bsingharora@...il.com>
To:	Seth Jennings <sjenning@...hat.com>
Cc:	Josh Poimboeuf <jpoimboe@...hat.com>,
	Jiri Kosina <jkosina@...e.cz>,
	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, Dec 17, 2014 at 12:35 AM, Seth Jennings <sjenning@...hat.com> wrote:
> On Tue, Dec 16, 2014 at 11:45:12PM +0530, Balbir Singh wrote:
>> On Tue, Dec 16, 2014 at 11:28 PM, Seth Jennings <sjenning@...hat.com> wrote:
>> >
>> > Changelog:
>> >
>> > Thanks for all the feedback!
>> >
>>
>> Could you describe what this does to signing? I presume the patched
>> module should cause a taint on module signing?
>
> The patch module can be signed to avoid the taint of being unsigned,
> assuming you have the signing key for the kernel you are running.
> However we do taint with a new taint flag (see 1/3) to indicate
> that the kernel has been patched.
>

I see, so the assumption is that the module and patch would be signed
with the same key?

Thanks,
Balbir Singh.
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