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Subject: Re: [PATCH 3/7] seccomp_filter: Enable ftrace-based system call
 filtering
From: Steven Rostedt <rostedt@goodmis.org>
To: Will Drewry <wad@chromium.org>
Cc: linux-kernel@vger.kernel.org, kees.cook@canonical.com, eparis@redhat.com,
        agl@chromium.org, mingo@elte.hu, jmorris@namei.org,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Ingo Molnar <mingo@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>, Tejun Heo <tj@kernel.org>,
        Michal Marek <mmarek@suse.cz>, Oleg Nesterov <oleg@redhat.com>,
        Roland McGrath <roland@redhat.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>, Jiri Slaby <jslaby@suse.cz>,
        David Howells <dhowells@redhat.com>,
        "Serge E. Hallyn" <serge@hallyn.com>
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On Wed, 2011-04-27 at 22:08 -0500, Will Drewry wrote:

> The only other twist is that it is possible to delay enforcement by one
> system call by supplying a "on_next_syscall: 1" 'filter'.  This allows
> for a launcher process to fork(), prctl(), then execve() leaving the
> launched binary in a filtered state.

I wonder if the more "unixy" thing to do is, instead of on_next_sycall,
have "enable_on_exec". Where the user could do multiple syscalls but the
filter will not take place until an exec is made?

-- Steve


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