linux-kernel - Re: [PATCH security-next v5 12/30] LSM: Provide separate ordered initialization

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Message-ID: <CAGXu5jKM_goC2519EXZu7Bh0VoW8jQeR=AJ0XovUPe4_635XNw@mail.gmail.com>
Date:   Fri, 2 Nov 2018 13:49:09 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Mimi Zohar <zohar@...ux.ibm.com>
Cc:     James Morris <jmorris@...ei.org>,
        Casey Schaufler <casey@...aufler-ca.com>,
        John Johansen <john.johansen@...onical.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        Paul Moore <paul@...l-moore.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Jordan Glover <Golden_Miller83@...tonmail.ch>,
        LSM <linux-security-module@...r.kernel.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH security-next v5 12/30] LSM: Provide separate ordered initialization

On Fri, Nov 2, 2018 at 11:13 AM, Mimi Zohar <zohar@...ux.ibm.com> wrote:
> I don't recall why "integrity" is on the security_initcall, while both
> IMA and EVM are on the late_initcall().

It's because integrity needs to have a VFS buffer allocated extremely
early, so it used the security init to do it. While it's not an LSM,
it does use this part of LSM infrastructure. I didn't see an obvious
alternative at the time, but now that I think about it, maybe just a
simple postcore_initcall() would work?

-Kees

-- 
Kees Cook