Messages in this thread | | | From | Andy Lutomirski <> | Date | Tue, 23 Jun 2015 17:52:29 -0700 | Subject | Re: kdbus: to merge or not to merge? |
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On Tue, Jun 23, 2015 at 4:19 PM, Linus Torvalds <torvalds@linux-foundation.org> wrote: > On Mon, Jun 22, 2015 at 11:06 PM, Andy Lutomirski <luto@amacapital.net> wrote: >> >> Can you opine as to whether you think that kdbus should be merged? I >> don't mean whether you'd accept a pull request that Greg may or may >> not send during this merge window -- I mean whether you think that >> kdbus should be merged if it had appropriate review and people were >> okay with the implementation. > > So I am still expecting to merge it, mainly for a rather simple > reason: I trust my submaintainers, and Greg in particular. So when a > major submaintainer wants to merge something, that pulls a *lot* of > weight with me.
Then I'll try to review the parts that I can review, time permitting, in the event that someone sends a clean, reviewable set of patches. Preferably not during the merge window.
If my, or anyone else's, review uncovers an ABI issue, then I will be correspondingly grumpy now that the userspace code is slated to ship with new systemd versions. Because we can't actually ship a kernel.org kernel that will fail to boot with Fedora Rawhide or Arch AUR or whatever unless kdbus=0 is set on the kernel command line.
If someone ships an actual desktop sandbox based on kdbus custom endpoints, I'll try to poke holes in it as usual. I don't intend to review that part for security in advance because I've already said my part: I think the design is unfit for its purpose. Given that I don't see how one is supposed to use it in a sensible manner for sandboxing in the first place, it's hard to evaluate whether it will do its job a priori.
(NB: I think I may have figured out what people mean when they say that custom endpoints are useful for sandboxes. They might be talking about BusPolicy= in systemd .service files. That's a nifty feature, but it seems rather limited and doesn't seem to me like it would be useful for things like xdg-app. Also, it could certainly be implemented in userspace.)
--Andy
P.S. I still remain unconvinced that any of the other arguments for merging it are better than the performance argument. But whatever.
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