[PATCH v10 0/11] seccomp: add thread sync ability
jmorris at namei.org
Wed Jul 16 09:44:20 PDT 2014
On Fri, 11 Jul 2014, Kees Cook wrote:
> On Fri, Jul 11, 2014 at 9:49 AM, Oleg Nesterov <oleg at redhat.com> wrote:
> > On 07/10, Kees Cook wrote:
> >> This adds the ability for threads to request seccomp filter
> >> synchronization across their thread group (at filter attach time).
> >> For example, for Chrome to make sure graphic driver threads are fully
> >> confined after seccomp filters have been attached.
> >> To support this, locking on seccomp changes via thread-group-shared
> >> sighand lock is introduced, along with refactoring of no_new_privs. Races
> >> with thread creation are handled via delayed duplication of the seccomp
> >> task struct field and cred_guard_mutex.
> >> This includes a new syscall (instead of adding a new prctl option),
> >> as suggested by Andy Lutomirski and Michael Kerrisk.
> > I do not not see any problems in this version,
> Awesome! Thank you for all the reviews. :) If Andy and Michael are
> happy with this too, I think this is in good shape. \o/
If you re-send this, please add Oleg's Reviewed-by to each patch.
> > Reviewed-by: Oleg Nesterov <oleg at redhat.com>
<jmorris at namei.org>
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