From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-mips@linux-mips.org, linux-sh@vger.kernel.org,
Frederic Weisbecker <fweisbec@gmail.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Oleg Nesterov <oleg@redhat.com>,
David Howells <dhowells@redhat.com>,
Paul Mackerras <paulus@samba.org>, Eric Paris <eparis@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
sparclinux@vger.kernel.org, Jiri Slaby <jslaby@suse.cz>,
linux-s390@vger.kernel.org, Russell King <linux@arm.linux.org.uk>,
x86@kernel.org, James Morris <jmorris@namei.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>,
kees.cook@canonical.com, "Serge E. Hallyn" <serge@hallyn.com>,
Steven Rostedt <rostedt@goodmis.org>, Tejun Heo <tj@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Michal Marek <mmarek@suse.cz>, Michal Simek <monstr@monstr.eu>,
Will Drewry <wad@chromium.org>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
Ralf Baechle <ralf@linux-mips.org>,
Paul Mundt <lethal@linux-sh.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
linux390@de.ibm.com, Andrew Morton <akpm@linux-foundation.org>,
agl@chromium.org, "David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH 3/5] v2 seccomp_filters: Enable ftrace-based system call filtering
Date: Sat, 14 May 2011 09:05:42 +0200 [thread overview]
Message-ID: <20110514070542.GA9307@elte.hu> (raw)
In-Reply-To: <1305300443.2466.77.camel@twins>
* Peter Zijlstra <peterz@infradead.org> wrote:
> On Fri, 2011-05-13 at 16:57 +0200, Ingo Molnar wrote:
> > this is a security mechanism
>
> Who says? [...]
Kernel developers/maintainers of the affected code.
We have security hooks all around the kernel, which can deny/accept execution
at various key points, but we do not have 'execute arbitrary user-space defined
(safe) scripts' callbacks in general.
But yes, if a particular callback point is defined widely enough to allow much
bigger intervention into the flow of execution, then more is possible as well.
> [...] and why would you want to unify two separate concepts only to them
> limit it to security that just doesn't make sense.
I don't limit them to security - the callbacks themselves are either for
passive observation or, at most, for security accept/deny callbacks.
It's decided by the subsystem maintainers what kind of user-space control power
(or observation power) they want to allow, not me.
I would just like to not stop the facility itself at the 'observe only' level,
like you suggest.
Thanks,
Ingo
next prev parent reply other threads:[~2011-05-14 7:06 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1304017638.18763.205.camel@gandalf.stny.rr.com>
2011-05-12 3:02 ` [PATCH 3/5] v2 seccomp_filters: Enable ftrace-based system call filtering Will Drewry
2011-05-12 7:48 ` Ingo Molnar
2011-05-12 9:24 ` Kees Cook
2011-05-12 10:49 ` Ingo Molnar
2011-05-12 11:44 ` James Morris
2011-05-12 13:01 ` Ingo Molnar
2011-05-12 16:26 ` Will Drewry
2011-05-16 12:55 ` Ingo Molnar
2011-05-16 14:42 ` Will Drewry
2011-05-13 0:18 ` James Morris
2011-05-13 12:10 ` Ingo Molnar
2011-05-13 12:19 ` Peter Zijlstra
2011-05-13 12:26 ` Ingo Molnar
2011-05-13 12:39 ` Peter Zijlstra
2011-05-13 12:43 ` Peter Zijlstra
2011-05-13 12:54 ` Ingo Molnar
2011-05-13 13:08 ` Peter Zijlstra
2011-05-13 13:18 ` Ingo Molnar
2011-05-13 13:55 ` Peter Zijlstra
2011-05-13 14:57 ` Ingo Molnar
2011-05-13 15:27 ` Peter Zijlstra
2011-05-14 7:05 ` Ingo Molnar [this message]
2011-05-16 16:23 ` Steven Rostedt
2011-05-16 16:52 ` Ingo Molnar
2011-05-16 17:03 ` Steven Rostedt
2011-05-17 12:42 ` Ingo Molnar
2011-05-17 13:05 ` Steven Rostedt
2011-05-17 13:19 ` Ingo Molnar
2011-05-19 4:07 ` Will Drewry
2011-05-19 12:22 ` Steven Rostedt
2011-05-19 21:05 ` Will Drewry
2011-05-24 15:59 ` Will Drewry
2011-05-24 16:20 ` Peter Zijlstra
2011-05-24 16:25 ` Thomas Gleixner
2011-05-24 19:00 ` Will Drewry
2011-05-24 19:54 ` Ingo Molnar
2011-05-24 20:10 ` Ingo Molnar
2011-05-25 10:35 ` Thomas Gleixner
2011-05-25 15:01 ` Ingo Molnar
2011-05-25 17:43 ` Peter Zijlstra
2011-05-29 20:17 ` Ingo Molnar
2011-05-25 17:48 ` Thomas Gleixner
2011-05-26 8:43 ` Ingo Molnar
2011-05-26 9:15 ` Ingo Molnar
2011-05-24 20:08 ` Ingo Molnar
2011-05-24 20:14 ` Steven Rostedt
2011-05-13 15:17 ` Eric Paris
2011-05-13 15:29 ` [PATCH 3/5] v2 seccomp_filters: Enable ftrace-based system callfiltering David Laight
2011-05-16 12:03 ` Ingo Molnar
2011-05-13 12:49 ` [PATCH 3/5] v2 seccomp_filters: Enable ftrace-based system call filtering Ingo Molnar
2011-05-13 13:55 ` Peter Zijlstra
2011-05-13 15:02 ` Ingo Molnar
2011-05-13 15:10 ` Eric Paris
2011-05-13 15:23 ` Peter Zijlstra
2011-05-13 15:55 ` Eric Paris
2011-05-13 16:29 ` Will Drewry
2011-05-14 7:30 ` Ingo Molnar
2011-05-14 20:57 ` Will Drewry
2011-05-16 12:43 ` Ingo Molnar
2011-05-16 15:29 ` Will Drewry
2011-05-17 12:57 ` Ingo Molnar
2011-05-16 0:36 ` James Morris
2011-05-16 15:08 ` Ingo Molnar
2011-05-17 2:24 ` James Morris
2011-05-17 13:10 ` Ingo Molnar
2011-05-17 13:29 ` James Morris
2011-05-17 18:34 ` Ingo Molnar
2011-05-26 6:27 ` Pavel Machek
2011-05-26 8:35 ` Ingo Molnar
2011-05-12 12:15 ` Frederic Weisbecker
2011-05-12 11:33 ` James Morris
2011-05-13 19:35 ` Arnd Bergmann
2011-05-14 20:58 ` Will Drewry
2011-05-15 6:42 ` Arnd Bergmann
2011-05-16 12:00 ` Ingo Molnar
2011-05-16 15:26 ` Steven Rostedt
2011-05-16 15:28 ` Will Drewry
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110514070542.GA9307@elte.hu \
--to=mingo@elte.hu \
--cc=agl@chromium.org \
--cc=akpm@linux-foundation.org \
--cc=davem@davemloft.net \
--cc=dhowells@redhat.com \
--cc=eparis@redhat.com \
--cc=fweisbec@gmail.com \
--cc=heiko.carstens@de.ibm.com \
--cc=hpa@zytor.com \
--cc=jmorris@namei.org \
--cc=jslaby@suse.cz \
--cc=kees.cook@canonical.com \
--cc=lethal@linux-sh.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@linux-mips.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux-sh@vger.kernel.org \
--cc=linux390@de.ibm.com \
--cc=linux@arm.linux.org.uk \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mingo@redhat.com \
--cc=mmarek@suse.cz \
--cc=monstr@monstr.eu \
--cc=oleg@redhat.com \
--cc=paulus@samba.org \
--cc=peterz@infradead.org \
--cc=ralf@linux-mips.org \
--cc=rostedt@goodmis.org \
--cc=schwidefsky@de.ibm.com \
--cc=serge@hallyn.com \
--cc=sparclinux@vger.kernel.org \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=wad@chromium.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).