linux-kernel - [PATCH v5 0/6] LSM: LoadPin for kernel file loading restrictions

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Date:	Wed, 20 Apr 2016 15:46:22 -0700
From:	Kees Cook <keescook@...omium.org>
To:	James Morris <jmorris@...ei.org>
Cc:	Kees Cook <keescook@...omium.org>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Joe Perches <joe@...ches.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Jonathan Corbet <corbet@....net>,
	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>,
	Casey Schaufler <casey@...aufler-ca.com>,
	Andreas Gruenbacher <agruenba@...hat.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, linux-doc@...r.kernel.org
Subject: [PATCH v5 0/6] LSM: LoadPin for kernel file loading restrictions

This provides the mini-LSM "loadpin" that intercepts the now consolidated
kernel_file_read LSM hook so that a system can keep all loads coming from
a single trusted filesystem. This is what Chrome OS uses to pin kernel
module and firmware loading to the read-only crypto-verified dm-verity
partition so that kernel module signing is not needed.

-Kees

v5:
- replace enum-to-str code, mimi
v4:
- add missing "const" to char * src, joe
v3:
- changed module parameter to "loadpin.enabled"
- add sysctl docs, akpm
- add general use function for enum, zohar
- add gfp_t, joe
- clean up loops, andriy.shevchenko
- reduce BUG_ON to WARN_ON, joe
v2:
- break out utility helpers into separate functions
- have Yama use new helpers too