From: ebiederm@xmission.com (Eric W. Biederman)
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>,
LSM <linux-security-module@vger.kernel.org>,
James Morris <jmorris@namei.org>,
Kees Cook <kees.cook@canonical.com>,
containers@lists.linux-foundation.org,
kernel list <linux-kernel@vger.kernel.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
xemul@parallels.com, dhowells@redhat.com
Subject: Re: userns: targeted capabilities v5
Date: Thu, 17 Feb 2011 19:53:37 -0800 [thread overview]
Message-ID: <m1vd0i6lry.fsf@fess.ebiederm.org> (raw)
In-Reply-To: <20110217162146.1b8e45e0.akpm@linux-foundation.org> (Andrew Morton's message of "Thu, 17 Feb 2011 16:21:46 -0800")
Andrew Morton <akpm@linux-foundation.org> writes:
> On Thu, 17 Feb 2011 15:02:24 +0000
> "Serge E. Hallyn" <serge@hallyn.com> wrote:
>
>> Here is a repost of my previous user namespace patch, ported onto
>> last night's git head.
>>
>> It fixes several things I was doing wrong in the last (v4)
>> posting, in particular:
>>
>> 1. don't set uts_ns->user_ns to current's when !CLONE_NEWUTS
>> 2. add a ipc_ns->user_ns which owns ipc_ns, and use that to
>> decide CAP_IPC_OWNER
>> 3. fix logic flaw caused by bad parantheses
>> 4. allow do_prlimit to current
>> 5. don't always give root full privs to init_user_ns
>>
>> The expected course of development for user namespaces is laid out
>> at https://wiki.ubuntu.com/UserNamespace.
>
> Seems like a nice feature to be developing.
>
> I worry about the maturity of it all at this stage. How far along is
> it *really*?
>
> Is anyone else working with you on developing and reviewing this work?
I did a lot of the initial design and I have been reviewing as I have
time.
Andrew at a practical level we have to merge this incrementally.
Anything much bigger than Serge's current patchset will be too big to
review. The first really bit step is making capabilities local to the
user namespace, and that is what this patchset does along with using
that localness in some good places.
Eric
next prev parent reply other threads:[~2011-02-18 3:53 UTC|newest]
Thread overview: 136+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-17 15:02 userns: targeted capabilities v5 Serge E. Hallyn
2011-02-17 15:02 ` [PATCH 1/9] Add a user_namespace as creator/owner of uts_namespace Serge E. Hallyn
2011-02-18 3:31 ` Eric W. Biederman
2011-02-18 16:57 ` Daniel Lezcano
2011-02-18 23:59 ` Andrew Morton
2011-02-23 17:16 ` David Howells
2011-02-23 21:21 ` Eric W. Biederman
2011-02-23 23:19 ` David Howells
2011-02-23 23:54 ` Eric W. Biederman
[not found] ` <8559.1298503148-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 23:54 ` Eric W. Biederman
[not found] ` <3139.1298481393-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 21:21 ` Eric W. Biederman
[not found] ` <m1lj16ih0n.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2011-02-23 23:19 ` David Howells
[not found] ` <20110217150257.GA26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 3:31 ` Eric W. Biederman
2011-02-18 16:57 ` Daniel Lezcano
2011-02-18 23:59 ` Andrew Morton
2011-02-23 17:16 ` David Howells
2011-02-17 15:03 ` [PATCH 2/9] security: Make capabilities relative to the user namespace Serge E. Hallyn
2011-02-18 3:46 ` Eric W. Biederman
2011-02-18 23:44 ` Daniel Lezcano
[not found] ` <20110217150306.GB26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 3:46 ` Eric W. Biederman
2011-02-18 23:44 ` Daniel Lezcano
2011-02-18 23:59 ` Andrew Morton
2011-02-23 11:40 ` David Howells
2011-02-23 16:59 ` David Howells
2011-02-18 23:59 ` Andrew Morton
2011-02-23 11:40 ` David Howells
2011-02-23 12:01 ` David Howells
[not found] ` <29617.1298462517-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 13:43 ` Serge E. Hallyn
2011-02-23 13:43 ` Serge E. Hallyn
2011-02-23 16:59 ` David Howells
2011-02-17 15:03 ` [PATCH 3/9] allow sethostname in a container Serge E. Hallyn
2011-02-18 3:05 ` Eric W. Biederman
[not found] ` <20110217150316.GC26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 3:05 ` Eric W. Biederman
2011-02-18 23:46 ` Daniel Lezcano
2011-02-18 23:46 ` Daniel Lezcano
2011-02-17 15:03 ` [PATCH 4/9] allow killing tasks in your own or child userns Serge E. Hallyn
2011-02-18 3:00 ` Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
[not found] ` <20110218155921.440f1137.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2011-02-24 0:48 ` Serge E. Hallyn
2011-02-24 0:48 ` Serge E. Hallyn
[not found] ` <20110224004818.GA11822-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-24 0:54 ` Andrew Morton
2011-02-24 0:54 ` Andrew Morton
[not found] ` <20110217150325.GD26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 3:00 ` Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
2011-02-19 10:55 ` Daniel Lezcano
2011-02-19 10:55 ` Daniel Lezcano
2011-02-17 15:03 ` [PATCH 5/9] Allow ptrace from non-init user namespaces Serge E. Hallyn
2011-02-18 2:59 ` Eric W. Biederman
[not found] ` <m1aahu9hea.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2011-02-18 4:36 ` Serge E. Hallyn
2011-02-18 4:36 ` Serge E. Hallyn
2011-02-24 0:49 ` [PATCH] userns: ptrace: incorporate feedback from Eric Serge E. Hallyn
[not found] ` <20110224004901.GB11822-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-24 0:56 ` Andrew Morton
2011-02-24 0:56 ` Andrew Morton
[not found] ` <20110223165651.cf248f3b.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2011-02-24 3:15 ` Serge E. Hallyn
2011-02-24 3:15 ` Serge E. Hallyn
[not found] ` <20110218043601.GB9584-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-24 0:49 ` Serge E. Hallyn
[not found] ` <20110217150333.GE26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 2:59 ` [PATCH 5/9] Allow ptrace from non-init user namespaces Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
2011-02-19 17:49 ` Daniel Lezcano
2011-02-23 17:05 ` David Howells
2011-02-23 17:11 ` David Howells
2011-02-18 23:59 ` Andrew Morton
2011-02-24 0:43 ` Serge E. Hallyn
[not found] ` <20110218155925.f7d30a52.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2011-02-24 0:43 ` Serge E. Hallyn
2011-02-19 17:49 ` Daniel Lezcano
2011-02-23 17:05 ` David Howells
2011-02-23 17:11 ` David Howells
[not found] ` <20110217150224.GA26334-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-17 15:02 ` [PATCH 1/9] Add a user_namespace as creator/owner of uts_namespace Serge E. Hallyn
2011-02-17 15:03 ` [PATCH 2/9] security: Make capabilities relative to the user namespace Serge E. Hallyn
2011-02-17 15:03 ` [PATCH 3/9] allow sethostname in a container Serge E. Hallyn
2011-02-17 15:03 ` [PATCH 4/9] allow killing tasks in your own or child userns Serge E. Hallyn
2011-02-17 15:03 ` [PATCH 5/9] Allow ptrace from non-init user namespaces Serge E. Hallyn
2011-02-17 15:03 ` [PATCH 6/9] user namespaces: convert all capable checks in kernel/sys.c Serge E. Hallyn
2011-02-17 15:03 ` [PATCH 7/9] add a user namespace owner of ipc ns Serge E. Hallyn
2011-02-17 15:03 ` [PATCH 8/9] user namespaces: convert several capable() calls Serge E. Hallyn
2011-02-17 15:04 ` [PATCH 9/9] userns: check user namespace for task->file uid equivalence checks Serge E. Hallyn
2011-02-18 0:21 ` userns: targeted capabilities v5 Andrew Morton
2011-02-23 12:05 ` User namespaces and keys David Howells
2011-02-17 15:03 ` [PATCH 6/9] user namespaces: convert all capable checks in kernel/sys.c Serge E. Hallyn
2011-02-18 1:57 ` Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
2011-02-19 0:01 ` Andrew Morton
2011-02-19 17:52 ` Daniel Lezcano
[not found] ` <20110217150342.GF26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 1:57 ` Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
2011-02-19 0:01 ` Andrew Morton
2011-02-19 17:52 ` Daniel Lezcano
2011-02-17 15:03 ` [PATCH 7/9] add a user namespace owner of ipc ns Serge E. Hallyn
[not found] ` <20110217150349.GG26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 3:19 ` Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
2011-02-19 17:57 ` Daniel Lezcano
2011-02-18 3:19 ` Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
2011-02-19 17:57 ` Daniel Lezcano
2011-02-17 15:03 ` [PATCH 8/9] user namespaces: convert several capable() calls Serge E. Hallyn
2011-02-18 1:51 ` Eric W. Biederman
[not found] ` <20110217150356.GH26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 1:51 ` Eric W. Biederman
2011-02-19 19:07 ` Daniel Lezcano
2011-02-19 19:07 ` Daniel Lezcano
2011-02-17 15:04 ` [PATCH 9/9] userns: check user namespace for task->file uid equivalence checks Serge E. Hallyn
2011-02-18 1:29 ` Eric W. Biederman
[not found] ` <20110217150406.GI26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 1:29 ` Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
2011-02-19 19:22 ` Daniel Lezcano
2011-02-18 23:59 ` Andrew Morton
[not found] ` <20110218155935.66e7782d.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2011-02-24 3:24 ` Serge E. Hallyn
2011-02-24 3:24 ` Serge E. Hallyn
[not found] ` <20110224032415.GA5555-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-24 5:08 ` Andrew Morton
2011-02-24 5:08 ` Andrew Morton
2011-02-19 19:22 ` Daniel Lezcano
2011-02-18 0:21 ` userns: targeted capabilities v5 Andrew Morton
[not found] ` <20110217162146.1b8e45e0.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2011-02-18 3:53 ` Eric W. Biederman
2011-02-18 4:28 ` Serge E. Hallyn
2011-02-18 3:53 ` Eric W. Biederman [this message]
2011-02-18 4:28 ` Serge E. Hallyn
[not found] ` <29256.1298461209-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 12:01 ` [PATCH 2/9] security: Make capabilities relative to the user namespace David Howells
2011-02-23 12:05 ` User namespaces and keys David Howells
2011-02-23 13:58 ` Serge E. Hallyn
2011-02-23 14:46 ` Eric W. Biederman
[not found] ` <20110223135814.GA1859-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-23 14:46 ` Eric W. Biederman
2011-02-23 15:06 ` David Howells
2011-02-23 15:06 ` David Howells
2011-02-23 15:45 ` Eric W. Biederman
[not found] ` <m162sasqj6.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2011-02-23 15:53 ` Serge E. Hallyn
2011-02-23 15:53 ` Serge E. Hallyn
[not found] ` <20110223155328.GA21266-BtbdaCaBcfOTUehee3IRJA@public.gmane.org>
2011-02-23 19:24 ` Casey Schaufler
2011-02-23 19:24 ` Casey Schaufler
2011-02-23 20:55 ` Eric W. Biederman
[not found] ` <m1k4gqlbdm.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2011-02-23 21:37 ` Casey Schaufler
2011-02-23 21:37 ` Casey Schaufler
2011-02-24 6:56 ` Eric W. Biederman
[not found] ` <4D657E0C.3010102-iSGtlc1asvQWG2LlvL+J4A@public.gmane.org>
2011-02-24 6:56 ` Eric W. Biederman
[not found] ` <4D655EE4.6030707-iSGtlc1asvQWG2LlvL+J4A@public.gmane.org>
2011-02-23 20:55 ` Eric W. Biederman
[not found] ` <890.1298473574-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 15:45 ` Eric W. Biederman
[not found] ` <29677.1298462729-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 13:58 ` Serge E. Hallyn
-- strict thread matches above, loose matches on Subject: below --
2011-02-17 15:02 userns: targeted capabilities v5 Serge E. Hallyn
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