From: Kees Cook <keescook@chromium.org>
To: John Johansen <john.johansen@canonical.com>
Cc: Paul Moore <paul@paul-moore.com>,
Casey Schaufler <casey@schaufler-ca.com>,
linux-security-module <linux-security-module@vger.kernel.org>,
James Morris <jmorris@namei.org>,
LKML <linux-kernel@vger.kernel.org>,
SE Linux <selinux@tycho.nsa.gov>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Stephen Smalley <sds@tycho.nsa.gov>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
"Schaufler, Casey" <casey.schaufler@intel.com>
Subject: Re: [PATCH 10/10] LSM: Blob sharing support for S.A.R.A and LandLock
Date: Thu, 13 Sep 2018 16:51:43 -0700 [thread overview]
Message-ID: <CAGXu5jKZ7rquTux5fS+5tQ==0w_9rDTRaJWS_mS7C+Fy2dXRRQ@mail.gmail.com> (raw)
In-Reply-To: <0eb75e66-ed50-4013-6440-38bc2f814c6f@canonical.com>
On Thu, Sep 13, 2018 at 4:32 PM, John Johansen
<john.johansen@canonical.com> wrote:
> On 09/13/2018 04:06 PM, Kees Cook wrote:
>> - what order should any stacking happen? Makefile? security=?
>>
> Preferably not. For the single LSM we have the ability to choose the default LSM, ideally we let the distro decide in the Kconfig and the user with security=...
I can't find a non-crazy way to do this in Kconfig. Right now, if I
threw out all the _DEFAULT stuff, I could do:
config SECURITY_SELINUX_ENABLED
bool "SELinux LSM enabled at boot time"
depends on SECURITY_SELINUX
depends on !SECURITY_APPARMOR_ENABLED && !SECURITY_SMACK_ENABLED
default SECURITY_SELINUX
config SECURITY_SMACK_ENABLED
bool "SMACK LSM enabled at boot time"
depends on SECURITY_SMACK
depends on !SECURITY_APPARMOR_ENABLED && !SECURITY_SELINUX_ENABLED
default SECURITY_SMACK
config SECURITY_APPARMOR_ENABLED
bool "AppArmor LSM enabled at boot time"
depends on SECURITY_APPARMOR
depends on !SECURITY_SMACK_ENABLED && !SECURITY_SELINUX_ENABLED
default SECURITY_APPARMOR
config SECURITY_TOMOYO_ENABLED
bool "TOMOYO LSM enabled at boot time"
depends on SECURITY_TOMOYO
default y if !SECURITY_SELINUX_ENABLED &&
!SECURITY_SMACK_ENABLED && !SECURITY_APPARMOR_ENABLED
config DEFAULT_SECURITY
string
default "selinux" if SECURITY_SELINUX_ENABLED
default "smack" if SECURITY_SMACK_ENABLED
default "apparmor" if SECURITY_APPARMOR_ENABLED
default "tomoyo" if SECURITY_TOMOYO_ENABLED
(As before CONFIG_DEFAULT_SECURITY basically means the effective
"security=" contents. Reminder than Kconfig default are "first match",
so tomoyo would only happen if all others are not enabled by default.)
But this doesn't provide a way for Kconfig to declare the ordering of
TOMOYO followed by SELinux. If we just declare ordering is a function
of the Makefile, then the above would work as expected. The
"conflicting major LSM" could be specified on "security=" and stacked
could be enabled with $lsm.enable=1 (or disabled).
So, before we can really make a decision, I think we have to decide:
should ordering be arbitrary for even this level of stacking?
-Kees
--
Kees Cook
Pixel Security
next prev parent reply other threads:[~2018-09-13 23:51 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-11 16:26 [PATCH v2 00/10] LSM: Module stacking in support of S.A.R.A and Landlock Casey Schaufler
2018-09-11 16:41 ` [PATCH 01/10] procfs: add smack subdir to attrs Casey Schaufler
2018-09-11 23:45 ` Ahmed S. Darwish
2018-09-12 0:01 ` Casey Schaufler
2018-09-12 22:57 ` Kees Cook
2018-09-11 16:41 ` [PATCH 02/10] Smack: Abstract use of cred security blob Casey Schaufler
2018-09-12 23:04 ` Kees Cook
2018-09-11 16:41 ` [PATCH 03/10] SELinux: " Casey Schaufler
2018-09-12 23:10 ` Kees Cook
2018-09-11 16:41 ` [PATCH 04/10] LSM: Infrastructure management of the " Casey Schaufler
2018-09-12 23:53 ` Kees Cook
2018-09-13 19:01 ` Casey Schaufler
2018-09-13 21:12 ` Kees Cook
2018-09-11 16:41 ` [PATCH 05/10] SELinux: Abstract use of file " Casey Schaufler
2018-09-12 23:54 ` Kees Cook
2018-09-11 16:42 ` [PATCH 06/10] LSM: Infrastructure management of the " Casey Schaufler
2018-09-13 0:00 ` Kees Cook
2018-09-11 16:42 ` [PATCH 07/10] SELinux: Abstract use of inode " Casey Schaufler
2018-09-13 0:23 ` Kees Cook
2018-09-11 16:42 ` [PATCH 08/10] Smack: " Casey Schaufler
2018-09-13 0:24 ` Kees Cook
2018-09-11 16:42 ` [PATCH 09/10] LSM: Infrastructure management of the inode security Casey Schaufler
2018-09-13 0:30 ` Kees Cook
2018-09-11 16:42 ` [PATCH 10/10] LSM: Blob sharing support for S.A.R.A and LandLock Casey Schaufler
2018-09-13 4:19 ` Kees Cook
2018-09-13 13:16 ` Paul Moore
2018-09-13 15:19 ` Kees Cook
2018-09-13 19:12 ` Paul Moore
2018-09-13 20:58 ` Jordan Glover
2018-09-13 21:50 ` Paul Moore
2018-09-13 22:04 ` Jordan Glover
2018-09-13 23:01 ` Casey Schaufler
2018-09-13 21:01 ` Kees Cook
2018-09-13 21:38 ` Paul Moore
2018-09-13 21:51 ` Kees Cook
2018-09-13 23:06 ` Kees Cook
2018-09-13 23:32 ` John Johansen
2018-09-13 23:51 ` Kees Cook [this message]
2018-09-14 0:03 ` Casey Schaufler
2018-09-14 0:06 ` Kees Cook
2018-09-13 23:51 ` Casey Schaufler
2018-09-13 23:57 ` Kees Cook
2018-09-14 0:08 ` Casey Schaufler
2018-09-14 0:19 ` Kees Cook
2018-09-14 15:57 ` Casey Schaufler
2018-09-14 20:05 ` Kees Cook
2018-09-14 20:47 ` Casey Schaufler
2018-09-14 18:18 ` James Morris
2018-09-14 18:23 ` John Johansen
2018-09-14 0:03 ` Kees Cook
2018-09-14 2:42 ` Paul Moore
2018-09-11 20:43 ` [PATCH v2 00/10] LSM: Module stacking in support of S.A.R.A and Landlock James Morris
2018-09-12 21:29 ` James Morris
2018-09-16 16:54 ` Salvatore Mesoraca
2018-09-16 17:25 ` Casey Schaufler
2018-09-16 17:45 ` Salvatore Mesoraca
2018-09-18 7:44 ` Mickaël Salaün
2018-09-18 15:23 ` Casey Schaufler
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