linux-kernel - Re: [PATCH v2 00/10] LSM: Module stacking in support of S.A.R.A and Landlock

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Date:   Tue, 18 Sep 2018 09:44:47 +0200
From:   Mickaël Salaün <mic@...ikod.net>
To:     James Morris <jmorris@...ei.org>,
        Casey Schaufler <casey@...aufler-ca.com>,
        Salvatore Mesoraca <s.mesoraca16@...il.com>
Cc:     LSM <linux-security-module@...r.kernel.org>,
        LKLM <linux-kernel@...r.kernel.org>,
        SE Linux <selinux@...ho.nsa.gov>,
        John Johansen <john.johansen@...onical.com>,
        Kees Cook <keescook@...omium.org>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Paul Moore <paul@...l-moore.com>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        "Schaufler, Casey" <casey.schaufler@...el.com>
Subject: Re: [PATCH v2 00/10] LSM: Module stacking in support of S.A.R.A and
 Landlock


On 9/12/18 23:29, James Morris wrote:
> Adding the SARA and LandLock authors for review & comment.
> 
> Salvatore & Mickaël: does this patchset meet your needs for merging to 
> mainline?

It almost does! For now, I need the task_struct, cred, inode and file
security blobs. Only the task_struct one is missing.

FYI, the capitalization of Landlock is not consistent in all commit
messages. :)

Thanks,
 Mickaël

> 
> 
> 
> On Tue, 11 Sep 2018, Casey Schaufler wrote:
> 
>> LSM: Module stacking in support of S.A.R.A and Landlock
>>
>> v2: Reduce the patchset to what is required to support
>>     the proposed S.A.R.A. and LandLock security modules
>>
>> The S.A.R.A. security module is intended to be used
>> in conjunction with other security modules. It requires
>> state to be maintained for the credential, which
>> in turn requires a mechanism for sharing the credential
>> security blob. The module also requires mechanism for
>> user space manipulation of the credential information,
>> hence an additional subdirectory in /proc/.../attr.
>>
>> The LandLock security module provides user configurable
>> policy in the secmark mechanism. It requires data in
>> the credential, file and inode security blobs. For this
>> to be used along side the existing "major" security
>> modules mechanism for sharing these blobs is provided.
>>
>> A side effect of providing sharing of the crendential
>> security blob is that the TOMOYO module can be used at
>> the same time as the other "major" modules.
>>
>> The mechanism for configuring which security modules are
>> enabled has to change when stacking in enabled. Any
>> module that uses just the security blobs that are shared
>> can be selected. Additionally, one other "major" module
>> can be selected.
>>
>> The security module stacking issues around networking and
>> IPC are not addressed here as they are beyond what is
>> required for TOMOYO, S.A.R.A and LandLock.
>>
>> git://github.com/cschaufler/lsm-stacking.git#stacking-4.19-rc2-saralock
>>
>> Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>
>> ---
>>  Documentation/admin-guide/LSM/index.rst |  23 ++-
>>  fs/proc/base.c                          |  64 ++++++-
>>  fs/proc/internal.h                      |   1 +
>>  include/linux/lsm_hooks.h               |  20 ++-
>>  include/linux/security.h                |  15 +-
>>  kernel/cred.c                           |  13 --
>>  security/Kconfig                        |  92 ++++++++++
>>  security/apparmor/domain.c              |   2 +-
>>  security/apparmor/include/cred.h        |  24 ++-
>>  security/apparmor/include/file.h        |   9 +-
>>  security/apparmor/include/lib.h         |   4 +
>>  security/apparmor/lsm.c                 |  53 ++++--
>>  security/apparmor/task.c                |   6 +-
>>  security/security.c                     | 293 ++++++++++++++++++++++++++++++--
>>  security/selinux/hooks.c                | 215 ++++++++---------------
>>  security/selinux/include/objsec.h       |  37 +++-
>>  security/selinux/selinuxfs.c            |   5 +-
>>  security/selinux/xfrm.c                 |   4 +-
>>  security/smack/smack.h                  |  42 ++++-
>>  security/smack/smack_access.c           |   4 +-
>>  security/smack/smack_lsm.c              | 283 +++++++++++-------------------
>>  security/smack/smackfs.c                |  18 +-
>>  security/tomoyo/common.h                |  31 +++-
>>  security/tomoyo/domain.c                |   4 +-
>>  security/tomoyo/securityfs_if.c         |  15 +-
>>  security/tomoyo/tomoyo.c                |  57 +++++--
>>  26 files changed, 899 insertions(+), 435 deletions(-)
>>
> 



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