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

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Message-ID: <1459811036.6228.30.camel@linux.vnet.ibm.com>
Date:	Mon, 04 Apr 2016 19:03:56 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Kees Cook <keescook@...omium.org>
Cc:	James Morris <jmorris@...ei.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kalle Valo <kvalo@...eaurora.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Joe Perches <joe@...ches.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>,
	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 <linux-security-module@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/5] LSM: LoadPin for kernel file loading restrictions

On Mon, 2016-04-04 at 12:31 -0700, Kees Cook wrote:
> On Thu, Mar 31, 2016 at 2:24 PM, Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:
> > On Mon, 2016-03-28 at 14:14 -0700, Kees Cook wrote:
> >
> >> +static const char *id_str[READING_MAX_ID] = {
> >> +     [READING_FIRMWARE] = "firmware",
> >> +     [READING_MODULE] = "kernel module",
> >> +     [READING_KEXEC_IMAGE] = "kexec image",
> >> +     [READING_KEXEC_INITRAMFS] = "kexec initramfs",
> >> +     [READING_POLICY] = "security policy",
> >> +};
> >> +

> I wonder if there should be a function that returns a const string for
> each kernel_read_file_id enum so users of the enum don't need to do
> it?

Right, having a single, corresponding, string array would be good.  Some
of the strings in id_str[] have blanks, which might be problematic for
the audit subsystem, and would need to be replaced with a hyphen or
underscore.

Mimi