From: Tycho Andersen <tycho@tycho.ws>
To: Michael Tirado <mtirado418@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@amacapital.net>
Subject: Re: [PATCH v6 3/5] seccomp: add a way to get a listener fd from ptrace
Date: Sun, 21 Oct 2018 17:00:45 +0100 [thread overview]
Message-ID: <20181021160045.GA25202@cisco> (raw)
In-Reply-To: <CAMkWEXOywaUUy3=G+26G1uYOPw-pq-Wq68xSPmShuAMCGwfcbQ@mail.gmail.com>
On Wed, Oct 17, 2018 at 06:15:47PM +0000, Michael Tirado wrote:
> Tycho, Sorry for the duplicate, I forgot to CC the list :(
>
> On Wed, Oct 17, 2018 at 3:00 PM Tycho Andersen <tycho@tycho.ws> wrote:
> >
> >
> > That's one of the use cases, but there are a large number of others. I
> > discuss a few in patch 1:
> > https://www.spinics.net/lists/linux-containers/msg33956.html
> >
>
> Thanks this is making more sense to me now.
>
> I haven't been keeping up with the list and just did a bunch
> of reading. It seems that stackable LSM's are making some real
> progress now, and I wonder if those patches are merged would
> using a stacked security module approach be worth exploring if
> it provides the same or greater flexibility, and assuming all
> syscalls of interest can be hooked somehow?
Sorry, I somehow just noticed that this was a duplicate and the one I
replied to was the off-list one. Anyway, no, I don't think that'll
work. The LSM code right now can't do anything besides refuse an
access, and that's a very specific design constraint of it. In
particular, it can't mutate any task state or anything.
What we want in this series is basically the equivalent of
SECCOMP_RET_TRACE, without having to involve ptrace (for a variety of
reasons, mostly that applications want to use ptrace for their own
things). So seccomp seems like the most natural fit.
Tycho
next prev parent reply other threads:[~2018-10-21 16:00 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-06 15:28 [PATCH v6 0/5] seccomp trap to userspace Tycho Andersen
2018-09-06 15:28 ` [PATCH v6 1/5] seccomp: add a return code to " Tycho Andersen
2018-09-06 22:15 ` Tyler Hicks
2018-09-07 15:45 ` Tycho Andersen
2018-09-08 20:35 ` Tycho Andersen
2018-09-06 15:28 ` [PATCH v6 2/5] seccomp: make get_nth_filter available outside of CHECKPOINT_RESTORE Tycho Andersen
2018-09-11 10:25 ` kbuild test robot
2018-09-06 15:28 ` [PATCH v6 3/5] seccomp: add a way to get a listener fd from ptrace Tycho Andersen
2018-09-06 15:45 ` Jann Horn
2018-09-06 15:50 ` Tycho Andersen
2018-09-13 0:00 ` Andy Lutomirski
2018-09-13 9:24 ` Tycho Andersen
2018-10-17 7:25 ` Michael Tirado
2018-10-17 15:00 ` Tycho Andersen
[not found] ` <CAMkWEXM1c7AGTH=tpgoHtPnFFY-V+05nGOU90Sa1E3EPY9OhKQ@mail.gmail.com>
2018-10-17 18:15 ` Michael Tirado
2018-10-21 16:00 ` Tycho Andersen [this message]
2018-10-17 18:31 ` Kees Cook
2018-09-06 15:28 ` [PATCH v6 4/5] seccomp: add support for passing fds via USER_NOTIF Tycho Andersen
2018-09-06 16:15 ` Jann Horn
2018-09-06 16:22 ` Tycho Andersen
2018-09-06 18:30 ` Tycho Andersen
2018-09-10 17:00 ` Jann Horn
2018-09-11 20:29 ` Tycho Andersen
2018-09-12 23:52 ` Andy Lutomirski
2018-09-13 9:25 ` Tycho Andersen
2018-09-13 9:42 ` Aleksa Sarai
2018-09-19 9:55 ` Tycho Andersen
2018-09-19 14:19 ` Andy Lutomirski
2018-09-19 14:38 ` Tycho Andersen
2018-09-19 19:58 ` Andy Lutomirski
2018-09-20 23:42 ` Tycho Andersen
2018-09-21 2:18 ` Andy Lutomirski
2018-09-21 13:39 ` Tycho Andersen
2018-09-21 18:27 ` Andy Lutomirski
2018-09-21 22:03 ` Tycho Andersen
2018-09-21 20:46 ` Jann Horn
2018-09-25 12:53 ` Tycho Andersen
2018-09-06 15:28 ` [PATCH v6 5/5] samples: add an example of seccomp user trap Tycho Andersen
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