linux-kernel - Re: [PATCH v2 5/5] LSM: LoadPin for kernel file loading restrictions

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Date:	Mon, 28 Mar 2016 16:20:34 -0700
From:	Joe Perches <joe@...ches.com>
To:	Kees Cook <keescook@...omium.org>, James Morris <jmorris@...ei.org>
Cc:	"Serge E. Hallyn" <serge@...lyn.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kalle Valo <kvalo@...eaurora.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Jiri Slaby <jslaby@...e.com>, Paul Moore <pmoore@...hat.com>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	Andreas Gruenbacher <agruenba@...hat.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Vitaly Kuznetsov <vkuznets@...hat.com>,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/5] LSM: LoadPin for kernel file loading
 restrictions

On Mon, 2016-03-28 at 14:14 -0700, Kees Cook wrote:
> This LSM enforces that kernel-loaded files (modules, firmware, etc)
> must all come from the same filesystem, with the expectation that
> such a filesystem is backed by a read-only device such as dm-verity
> or CDROM. This allows systems that have a verified and/or unchangeable
> filesystem to enforce module and firmware loading restrictions without
> needing to sign the files individually.

trivia:

> diff --git a/security/loadpin/loadpin.c b/security/loadpin/loadpin.c
[]
> +#define pr_fmt(fmt) "LoadPin: " fmt

Using

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

would be a lot more common.

Is there some reason the logging messages should be
prefixed with "LoadPin: " instead of "loadpin: "?