Re: [PATCH 1/2] user namespaces: let user_ns be cloned with fairsched

James Morris
2008-12-07T22:51:44Z

On Wed, 3 Dec 2008, Serge E. Hallyn wrote:

> (These two patches are in the next-unacked branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/sergeh/userns-2.6.
> If they get some ACKs, then I hope to feed this into security-next.
> After these two, I think we're ready to tackle userns+capabilities)
>
> Fairsched creates a per-uid directory under /sys/kernel/uids/.
> So when you clone(CLONE_NEWUSER), it tries to create
> /sys/kernel/uids/0, which already exists, and you get back
> -ENOMEM.
>
> This was supposed to be fixed by sysfs tagging, but that
> was postponed (ok, rejected until sysfs locking is fixed).
> So, just as with network namespaces, we just don't create
> those directories for user namespaces other than the init.
>
> Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>

Applied to
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6#next

--
James Morris
<jmorris@namei.org>