linux-kernel - Re: [RFC PATCH 1/2] devices cgroup: allow can_attach() if ns

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Message-ID: <CAOS58YPynQ-QBx5nZEnYrP5kGTVvv9VAj0cV0aYeikTitvTQbA@mail.gmail.com>
Date:	Tue, 23 Jul 2013 14:50:22 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Serge Hallyn <serge.hallyn@...ntu.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Containers <containers@...ts.linux-foundation.org>
Subject: Re: [RFC PATCH 1/2] devices cgroup: allow can_attach() if ns_capable

On Tue, Jul 23, 2013 at 2:38 PM, Serge Hallyn <serge.hallyn@...ntu.com> wrote:
> This doesn't delegate it into the container.  It allows me, on the host,
> to set the cgroup for a container.

Hmmm? I'm a bit confused. Isn't the description saying that the patch
allows pseudo-root in userns to change cgroup membership even if it
isn't actually root?

Besides, I find the whole check rather bogus and would actually much
prefer just nuking the check and just follow the standard permission
checks.

Thanks.

--
tejun
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