From: "Mickaël Salaün" <mic@digikod.net>
To: Pavel Machek <pavel@ucw.cz>
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: Tue, 20 Sep 2016 19:08:23 +0200 [thread overview]
Message-ID: <57E16D07.4050301@digikod.net> (raw)
In-Reply-To: <20160915091902.GA13132@amd>
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On 15/09/2016 11:19, Pavel Machek wrote:
> 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
Right, but I was looking for feedback before investing in documentation. :)
>
>> 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
>>
>
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next prev parent reply other threads:[~2016-09-20 17:09 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-25 10:32 [RFC v2 00/10] Landlock LSM: Unprivileged sandboxing 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
2016-09-20 17:08 ` Mickaël Salaün [this message]
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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