Re: [PATCH v10 09/12] arch/x86: enable task isolation functionality

[Chris Metcalf]

On 3/9/2016 3:58 PM, Andy Lutomirski wrote:
> > My preference would be not to have to require all task-isolation users
> > >to also figure out all the complexities of creating BPF programs, so
> > >my intention is to have task isolation automatically generate a BPF
> > >program (just allowing prctl/exit/exit_group and failing everything
> > >else with SIGSYS).  To support having it work this way, I open up
> > >the seccomp stuff a little so that kernel clients can effectively
> > >push/pop a BPF program into seccomp:
> That sounds like a great use case for the new libtaskisolation that
> someone is surely writing:)

Happily, task isolation is so simple an API that all that is needed is a prctl().

... Unless somehow a requirement to inflict a huge blob of eBPF into the kernel
just to use task isolation safely is added, of course :-)

--
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com