linux-kernel - [PATCH v3 00/16] LSM: Module stacking in support of SARA and Landlock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <748c61cb-b6fa-c36d-a7b3-2315ff6292af@schaufler-ca.com>
Date:   Wed, 19 Sep 2018 17:03:09 -0700
From:   Casey Schaufler <casey@...aufler-ca.com>
To:     LSM <linux-security-module@...r.kernel.org>,
        James Morris <jmorris@...ei.org>,
        SE Linux <selinux@...ho.nsa.gov>,
        LKLM <linux-kernel@...r.kernel.org>,
        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>,
        Mickaël Salaün <mic@...ikod.net>,
        Salvatore Mesoraca <s.mesoraca16@...il.com>
Cc:     Casey Schaufler <casey@...aufler-ca.com>
Subject: [PATCH v3 00/16] LSM: Module stacking in support of SARA and Landlock

LSM: Module stacking in support of SARA and Landlock

v3: Add ipc blob for SARA and task blob for Landlock.
    Removing the SELinux cred blob pointer poisoning
    results selinux_is_enabled() being unused, so it and
    all it's overhead has been removed.
    Broke up the cred infrastructure patch.
v2: Reduce the patchset to what is required to support
    the proposed SARA and LandLock security modules

The SARA 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. It also uses the ipc 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, inode and task security blobs. For
this to be used along side the existing "major" security
modules mechanism for sharing these blobs are 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, SARA and LandLock.

git://github.com/cschaufler/lsm-stacking.git#stacking-4.19-rc2-saralock-v3

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/cred.h                    |   1 -
 include/linux/lsm_hooks.h               |  24 +-
 include/linux/security.h                |  15 +-
 include/linux/selinux.h                 |  35 ---
 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/include/task.h        |  18 +-
 security/apparmor/lsm.c                 |  68 +++--
 security/apparmor/task.c                |   6 +-
 security/security.c                     | 438 ++++++++++++++++++++++++++++++--
 security/selinux/Makefile               |   2 +-
 security/selinux/exports.c              |  23 --
 security/selinux/hooks.c                | 333 +++++++-----------------
 security/selinux/include/audit.h        |   3 -
 security/selinux/include/objsec.h       |  48 +++-
 security/selinux/selinuxfs.c            |   4 +-
 security/selinux/ss/services.c          |   1 -
 security/selinux/xfrm.c                 |   4 +-
 security/smack/smack.h                  |  55 +++-
 security/smack/smack_access.c           |   4 +-
 security/smack/smack_lsm.c              | 329 +++++++++---------------
 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 ++++-
 33 files changed, 1109 insertions(+), 659 deletions(-)