Messages in this thread | | | From | Linus Torvalds <> | Date | Mon, 8 Jan 2018 10:35:32 -0800 | Subject | Re: [PATCH RFC 3/4] x86/pti: don't mark the user PGD with _PAGE_NX. |
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On Mon, Jan 8, 2018 at 10:25 AM, Alan Cox <gnomes@lxorguk.ukuu.org.uk> wrote: > > I still think cgroups are the best model for this. In particular it > naturally fits things like containers, or network facing apps that fork > helpers. > > Secondly when you are looking at barrier semantics between client/client > a cgroup is much more natural as a way to group processes together who > don't need to be protected from each other as they are trusting each > other. (Or we could just harcode this based upon ptraceability ?)
I agree that cgroups would be fairly natural, but I do think we could look at things like simply trusted users too ("running as root? Yeah, we're not going to try to protect the kernel from you") and/or trusted binaries.
But all of those things are likely things that can easily be determined at execve() time.
Linus
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