Re: [PATCH 3/5] v2 seccomp_filters: Enable ftrace-based system call filtering

  On Mon 2011-05-16 10:36:05, James Morris wrote:

On Fri, 13 May 2011, Ingo Molnar wrote:
How do you reason about the behavior of the system as a whole?

quoted

I argue that this is the LSM and audit subsystems designed right: in the long 
run it could allow everything that LSM does at the moment - and so much more 
...

Now you're proposing a redesign of the security subsystem.  That's a 
significant undertaking.

In the meantime, we have a simple, well-defined enhancement to seccomp 
which will be very useful to current users in reducing their kernel attack 
surface.

Well, you can do the same with subterfugue, even without kernel
changes. But that's ptrace -- slow. (And it already shows that syscall
based filters are extremely tricky to configure).

If yu want speed, seccomp+server for non-permitted operations seems like reasonable way.

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