On Thu, 2008-04-17 at 09:12 -0400, Stephen Smalley wrote: > On Wed, 2008-04-16 at 23:23 -0400, Bill Nottingham wrote: > > James Morris (jmorris@xxxxxxxxx) said: > > > > You cannot create files in a chroot of a context not known by the > > > > host policy. This means that if your host is running RHEL 5, you are > > > > unable to compose any trees/images/livecds with SELinux enabled for > > > > later releases. > > > > > > Ok, that's what I suspected. > > > > > > One of the possible plans for this is to allow a process to run in a > > > separate policy namespace, and probably also utilize namespace support in > > > general. > > > > > > This is non-trivial and needs more analysis. > > > > Incidentally, this is also one of the blockers for policy-in-packages, > > rather than a monolithic one. > > I assume you mean setting down unknown file labels rather than > per-namespace or per-chroot policy support. I think they are related > but different. The former is required if you always plan to install the > files _before_ loading the policy. The latter is required primarily for > getting any scriptlets to run in the right security contexts so that any > files they create are labeled appropriately within the chroot. BTW, for reference, a patch to support setting down unknown file labels was posted here a couple of years ago: http://marc.info/?l=selinux&m=114771094617968&w=2 But unfortunately we weren't able to sort the remaining issues discussed in that thread. > Also, I wanted to emphasize that chroot is different than unsharing the > filesystem namespace, and per-chroot policy is not the same thing as > per-namespace policy. I'd expect though that it would actually be a > per-process policy mechanism, with most processes sharing the same > policy but programs like rpm being able to unshare policy from their > parent and then load a private policy to be applied only to their > descendants. > -- Stephen Smalley National Security Agency -- fedora-selinux-list mailing list fedora-selinux-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-selinux-list
