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From: Pavel Machek <pavel@ucw.cz>
To: "Mickaël Salaün" <mic@digikod.net>
Cc: linux-kernel@vger.kernel.org, Alexei Starovoitov <ast@kernel.org>,
	Andy Lutomirski <luto@amacapital.net>,
	Arnd Bergmann <arnd@arndb.de>,
	Casey Schaufler <casey@schaufler-ca.com>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Daniel Mack <daniel@zonque.org>,
	David Drysdale <drysdale@google.com>,
	"David S . Miller" <davem@davemloft.net>,
	Elena Reshetova <elena.reshetova@intel.com>,
	James Morris <james.l.morris@oracle.com>,
	Kees Cook <keescook@chromium.org>, Paul Moore <pmoore@redhat.com>,
	Sargun Dhillon <sargun@sargun.me>,
	"Serge E . Hallyn" <serge@hallyn.com>,
	Will Drewry <wad@chromium.org>,
	kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org,
	linux-security-module@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [RFC v2 00/10] Landlock LSM: Unprivileged sandboxing
Date: Thu, 15 Sep 2016 11:19:02 +0200
Message-ID: <20160915091902.GA13132@amd> (raw)
In-Reply-To: <1472121165-29071-1-git-send-email-mic@digikod.net>

Hi!

> This series is a proof of concept to fill some missing part of seccomp as the
> ability to check syscall argument pointers or creating more dynamic security
> policies. The goal of this new stackable Linux Security Module (LSM) called
> Landlock is to allow any process, including unprivileged ones, to create
> powerful security sandboxes comparable to the Seatbelt/XNU Sandbox or the
> OpenBSD Pledge. This kind of sandbox help to mitigate the security impact of
> bugs or unexpected/malicious behaviors in userland applications.
> 
> The first RFC [1] was focused on extending seccomp while staying at the syscall
> level. This brought a working PoC but with some (mitigated) ToCToU race
> conditions due to the seccomp ptrace hole (now fixed) and the non-atomic
> syscall argument evaluation (hence the LSM hooks).

Long and nice description follows. Should it go to Documentation/
somewhere?

Because some documentation would be useful...
								Pavel

>  include/linux/bpf.h                   |  41 +++++
>  include/linux/lsm_hooks.h             |   5 +
>  include/linux/seccomp.h               |  54 ++++++-
>  include/uapi/asm-generic/errno-base.h |   1 +
>  include/uapi/linux/bpf.h              | 103 ++++++++++++
>  include/uapi/linux/seccomp.h          |   2 +
>  kernel/bpf/arraymap.c                 | 222 +++++++++++++++++++++++++
>  kernel/bpf/syscall.c                  |  18 ++-
>  kernel/bpf/verifier.c                 |  32 +++-
>  kernel/fork.c                         |  41 ++++-
>  kernel/seccomp.c                      | 211 +++++++++++++++++++++++-
>  samples/Makefile                      |   2 +-
>  samples/landlock/.gitignore           |   1 +
>  samples/landlock/Makefile             |  16 ++
>  samples/landlock/sandbox.c            | 295 ++++++++++++++++++++++++++++++++++
>  security/Kconfig                      |   1 +
>  security/Makefile                     |   2 +
>  security/landlock/Kconfig             |  19 +++
>  security/landlock/Makefile            |   3 +
>  security/landlock/checker_cgroup.c    |  96 +++++++++++
>  security/landlock/checker_cgroup.h    |  18 +++
>  security/landlock/checker_fs.c        | 183 +++++++++++++++++++++
>  security/landlock/checker_fs.h        |  20 +++
>  security/landlock/lsm.c               | 228 ++++++++++++++++++++++++++
>  security/security.c                   |   1 +
>  25 files changed, 1592 insertions(+), 23 deletions(-)
>  create mode 100644 samples/landlock/.gitignore
>  create mode 100644 samples/landlock/Makefile
>  create mode 100644 samples/landlock/sandbox.c
>  create mode 100644 security/landlock/Kconfig
>  create mode 100644 security/landlock/Makefile
>  create mode 100644 security/landlock/checker_cgroup.c
>  create mode 100644 security/landlock/checker_cgroup.h
>  create mode 100644 security/landlock/checker_fs.c
>  create mode 100644 security/landlock/checker_fs.h
>  create mode 100644 security/landlock/lsm.c
> 

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

  parent reply index

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-25 10:32 Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 01/10] landlock: Add Kconfig Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 02/10] bpf: Move u64_to_ptr() to BPF headers and inline it Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 03/10] bpf,landlock: Add a new arraymap type to deal with (Landlock) handles Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 04/10] seccomp: Split put_seccomp_filter() with put_seccomp() Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 05/10] seccomp: Handle Landlock Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 06/10] landlock: Add LSM hooks Mickaël Salaün
2016-08-30 18:56   ` Andy Lutomirski
2016-08-30 20:10     ` Mickaël Salaün
2016-08-30 20:18       ` Andy Lutomirski
2016-08-30 20:27         ` Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 07/10] landlock: Add errno check Mickaël Salaün
2016-08-25 11:13   ` Andy Lutomirski
2016-08-25 10:32 ` [RFC v2 08/10] landlock: Handle file system comparisons Mickaël Salaün
2016-08-25 11:12   ` Andy Lutomirski
2016-08-25 14:10     ` Mickaël Salaün
2016-08-26 14:57       ` Andy Lutomirski
2016-08-27 13:45         ` Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 09/10] landlock: Handle cgroups Mickaël Salaün
2016-08-25 11:09   ` Andy Lutomirski
2016-08-25 14:44     ` Mickaël Salaün
2016-08-26 12:55       ` Tejun Heo
2016-08-26 14:20       ` Andy Lutomirski
2016-08-26 15:50         ` Tejun Heo
2016-08-26  2:14   ` Alexei Starovoitov
2016-08-26 15:10     ` Mickaël Salaün
2016-08-26 23:05       ` Alexei Starovoitov
2016-08-27  7:30         ` Andy Lutomirski
2016-08-27 18:11           ` Alexei Starovoitov
2016-08-28  8:14             ` Andy Lutomirski
2016-08-27 14:06         ` [RFC v2 09/10] landlock: Handle cgroups (performance) Mickaël Salaün
2016-08-27 18:06           ` Alexei Starovoitov
2016-08-27 19:35             ` Mickaël Salaün
2016-08-27 20:43               ` Alexei Starovoitov
2016-08-27 21:14                 ` Mickaël Salaün
2016-08-28  8:13                   ` Andy Lutomirski
2016-08-28  9:42                     ` Mickaël Salaün
2016-08-30 18:55                       ` Andy Lutomirski
2016-08-30 20:20                         ` Mickaël Salaün
2016-08-30 20:23                           ` Andy Lutomirski
2016-08-30 20:33                             ` Mickaël Salaün
2016-08-30 20:55                               ` Alexei Starovoitov
2016-08-30 21:45                                 ` Andy Lutomirski
2016-08-31  1:36                                   ` Alexei Starovoitov
2016-08-31  3:29                                     ` Andy Lutomirski
2016-08-27 14:19         ` [RFC v2 09/10] landlock: Handle cgroups (netfilter match) Mickaël Salaün
2016-08-27 18:32           ` Alexei Starovoitov
2016-08-27 14:34         ` [RFC v2 09/10] landlock: Handle cgroups (program types) Mickaël Salaün
2016-08-27 18:19           ` Alexei Starovoitov
2016-08-27 19:55             ` Mickaël Salaün
2016-08-27 20:56               ` Alexei Starovoitov
2016-08-27 21:18                 ` Mickaël Salaün
2016-08-25 10:32 ` [RFC v2 10/10] samples/landlock: Add sandbox example Mickaël Salaün
2016-08-25 11:05 ` [RFC v2 00/10] Landlock LSM: Unprivileged sandboxing Andy Lutomirski
2016-08-25 13:57   ` Mickaël Salaün
2016-08-27  7:40 ` Andy Lutomirski
2016-08-27 15:10   ` Mickaël Salaün
2016-08-27 15:21     ` [RFC v2 00/10] Landlock LSM: Unprivileged sandboxing (cgroup delegation) Mickaël Salaün
2016-08-30 16:06 ` [RFC v2 00/10] Landlock LSM: Unprivileged sandboxing Andy Lutomirski
2016-08-30 19:51   ` Mickaël Salaün
2016-08-30 19:55     ` Andy Lutomirski
2016-09-15  9:19 ` Pavel Machek [this message]
2016-09-20 17:08   ` Mickaël Salaün
2016-09-24  7:45     ` Pavel Machek
2016-10-03 22:56     ` Kees Cook
2016-10-05 20:30       ` Mickaël Salaün

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