linux-kernel - Re: [PATCH] LSM: LoadPin for module and firmware loading restrictions

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Message-ID: <CAGXu5jKosNx2TKBSNNRYyssuL+2tv1HXzFJvMZ1q9_kfo+FbUA@mail.gmail.com>
Date:	Mon, 27 Jul 2015 19:42:15 -0700
From:	Kees Cook <keescook@...omium.org>
To:	James Morris <jmorris@...ei.org>
Cc:	linux-security-module <linux-security-module@...r.kernel.org>,
	James Morris <james.l.morris@...cle.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] LSM: LoadPin for module and firmware loading restrictions

On Mon, Jul 27, 2015 at 7:36 PM, James Morris <jmorris@...ei.org> wrote:
> On Mon, 27 Jul 2015, Kees Cook wrote:
>
>> On Sun, Jul 26, 2015 at 9:26 PM, James Morris <jmorris@...ei.org> wrote:
>> > On Thu, 23 Jul 2015, Kees Cook wrote:
>> >
>> >> +
>> >> +/*
>> >> + * Return an allocated string that has been escaped of special characters
>> >> + * and double quotes, making it safe to log in quotes.
>> >> + */
>> >> +static char *kstrdup_quotable(char *src)
>> >> +{
>> >
>> > Do you think these should go into a library?
>>
>> Possibly. There are some other areas of code that almost do the same
>> thing, but not exactly. Perhaps I'll first change Yama around to use
>> it, then send these again.
>
> Ok.  Is this the same code being used in ChromeOS?

Essentially, yes. As the kernels used by Chrome OS don't have LSM
stacking, we merged a bunch of functionality into a single LSM.
LoadPin is a logical subset of that LSM.

-Kees

-- 
Kees Cook
Chrome OS Security
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