linux-kernel - Re: [PATCH security-next v3 00/29] LSM: Explict LSM ordering

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Message-ID: <e6122c7d-bd29-d081-3c1e-96b7c369d4fe@schaufler-ca.com>
Date:   Fri, 28 Sep 2018 08:55:12 -0700
From:   Casey Schaufler <casey@...aufler-ca.com>
To:     Kees Cook <keescook@...omium.org>, James Morris <jmorris@...ei.org>
Cc:     John Johansen <john.johansen@...onical.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Paul Moore <paul@...l-moore.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        "Schaufler, Casey" <casey.schaufler@...el.com>,
        LSM <linux-security-module@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH security-next v3 00/29] LSM: Explict LSM ordering

On 9/24/2018 5:18 PM, Kees Cook wrote:
> v3:
> - add CONFIG_LSM_ENABLE and refactor resulting logic

Kees, you can add my

	Reviewed-by:Casey Schaufler <casey@...aufler-ca.com>

for this entire patch set. Thank you for taking this on, it's
a significant and important chunk of the LSM infrastructure
update.


> ...
> Breakdown of patches:
>
> Infrastructure improvements (no logical changes):
>   LSM: Correctly announce start of LSM initialization
>   vmlinux.lds.h: Avoid copy/paste of security_init section
>   LSM: Rename .security_initcall section to .lsm_info
>   LSM: Remove initcall tracing
>   LSM: Convert from initcall to struct lsm_info
>   vmlinux.lds.h: Move LSM_TABLE into INIT_DATA
>   LSM: Convert security_initcall() into DEFINE_LSM()
>   LSM: Record LSM name in struct lsm_info
>   LSM: Provide init debugging infrastructure
>   LSM: Don't ignore initialization failures
>
> Split "integrity" out into "ordered initialization" (no logical changes):
>   LSM: Introduce LSM_FLAG_LEGACY_MAJOR
>   LSM: Provide separate ordered initialization
>
> Provide centralized LSM enable/disable infrastructure:
>   LoadPin: Rename "enable" to "enforce"
>   LSM: Plumb visibility into optional "enabled" state
>   LSM: Lift LSM selection out of individual LSMs
>   LSM: Prepare for arbitrary LSM enabling
>   LSM: Introduce CONFIG_LSM_ENABLE
>   LSM: Introduce lsm.enable= and lsm.disable=
>   LSM: Prepare for reorganizing "security=" logic
>   LSM: Refactor "security=" in terms of enable/disable
>
> Provide centralized LSM ordering infrastructure:
>   LSM: Build ordered list of ordered LSMs for init
>   LSM: Introduce CONFIG_LSM_ORDER
>   LSM: Introduce "lsm.order=" for boottime ordering
>
> Move minor LSMs into ordered LSM initialization:
>   LoadPin: Initialize as ordered LSM
>   Yama: Initialize as ordered LSM
>   LSM: Introduce enum lsm_order
>   capability: Initialize as LSM_ORDER_FIRST
>
> Move major LSMs into ordered LSM initialization:
>   LSM: Separate idea of "major" LSM from "exclusive" LSM
>   LSM: Add all exclusive LSMs to ordered initialization
>
> -Kees
>
>  .../admin-guide/kernel-parameters.txt         |  20 +
>  arch/arc/kernel/vmlinux.lds.S                 |   1 -
>  arch/arm/kernel/vmlinux-xip.lds.S             |   1 -
>  arch/arm64/kernel/vmlinux.lds.S               |   1 -
>  arch/h8300/kernel/vmlinux.lds.S               |   1 -
>  arch/microblaze/kernel/vmlinux.lds.S          |   2 -
>  arch/powerpc/kernel/vmlinux.lds.S             |   2 -
>  arch/um/include/asm/common.lds.S              |   2 -
>  arch/xtensa/kernel/vmlinux.lds.S              |   1 -
>  include/asm-generic/vmlinux.lds.h             |  25 +-
>  include/linux/init.h                          |   2 -
>  include/linux/lsm_hooks.h                     |  43 ++-
>  include/linux/module.h                        |   1 -
>  security/Kconfig                              |  61 ++-
>  security/apparmor/lsm.c                       |  16 +-
>  security/commoncap.c                          |   8 +-
>  security/integrity/iint.c                     |   5 +-
>  security/loadpin/Kconfig                      |   4 +-
>  security/loadpin/loadpin.c                    |  28 +-
>  security/security.c                           | 351 +++++++++++++++---
>  security/selinux/hooks.c                      |  16 +-
>  security/smack/smack_lsm.c                    |   8 +-
>  security/tomoyo/tomoyo.c                      |   7 +-
>  security/yama/yama_lsm.c                      |   7 +-
>  24 files changed, 438 insertions(+), 175 deletions(-)
>