From: "Serge E. Hallyn" <serge@hallyn.com>
To: David Howells <dhowells@redhat.com>
Cc: "Serge E. Hallyn" <serge@hallyn.com>,
LSM <linux-security-module@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, James Morris <jmorris@namei.org>,
Kees Cook <kees.cook@canonical.com>,
containers@lists.linux-foundation.org,
kernel list <linux-kernel@vger.kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
xemul@parallels.com
Subject: Re: User namespaces and keys
Date: Wed, 23 Feb 2011 13:58:14 +0000 [thread overview]
Message-ID: <20110223135814.GA1859@mail.hallyn.com> (raw)
In-Reply-To: <29677.1298462729@redhat.com>
Quoting David Howells (dhowells@redhat.com):
>
> I guess we need to look at how to mix keys and namespaces again.
>From strictly kernel pov, at the moment, keys are strictly usable only
by the user in your own user namespace.
We may want to look at this again, but for now I think that would be a
safe enough default. Later, we'll probably want the user creating a
child_user_ns to allow his keys to be inherited by the child user_ns.
Though, as I type that, it seems to me that that'll just become a
maintenance pain, and it's just plain safer to have the user re-enter
his keys, sharing them over a file if needed.
I'm going to not consider the TPM at the moment :)
> Possibly the trickiest problem with keys is how to upcall key construction to
> /sbin/request-key when the keys may be of a different user namespace.
Hm, jinkeys, yes.
-serge
next prev parent reply other threads:[~2011-02-23 13:58 UTC|newest]
Thread overview: 135+ 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
[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
2011-02-23 17:16 ` David Howells
[not found] ` <3139.1298481393-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 21:21 ` Eric W. Biederman
2011-02-23 21:21 ` Eric W. Biederman
2011-02-23 23:19 ` David Howells
[not found] ` <8559.1298503148-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 23:54 ` Eric W. Biederman
2011-02-23 23:54 ` Eric W. Biederman
[not found] ` <m1lj16ih0n.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2011-02-23 23:19 ` 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
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
[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
2011-02-17 15:03 ` [PATCH 3/9] allow sethostname in a container Serge E. Hallyn
[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 3:05 ` Eric W. Biederman
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
[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
2011-02-18 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
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
2011-02-18 4:36 ` Serge E. Hallyn
[not found] ` <20110218043601.GB9584-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-24 0:49 ` [PATCH] userns: ptrace: incorporate feedback from Eric Serge E. Hallyn
2011-02-24 0:49 ` Serge E. Hallyn
2011-02-24 0:56 ` Andrew Morton
2011-02-24 3:15 ` Serge E. Hallyn
[not found] ` <20110223165651.cf248f3b.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2011-02-24 3:15 ` Serge E. Hallyn
[not found] ` <20110224004901.GB11822-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-24 0:56 ` Andrew Morton
[not found] ` <m1aahu9hea.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2011-02-18 4:36 ` [PATCH 5/9] Allow ptrace from non-init user namespaces Serge E. Hallyn
2011-02-18 23:59 ` Andrew Morton
[not found] ` <20110218155925.f7d30a52.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2011-02-24 0:43 ` Serge E. Hallyn
2011-02-24 0:43 ` Serge E. Hallyn
[not found] ` <20110217150333.GE26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 2:59 ` 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
2011-02-19 17:49 ` Daniel Lezcano
2011-02-23 17:05 ` David Howells
2011-02-23 17:11 ` 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
[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
2011-02-19 17:52 ` Daniel Lezcano
2011-02-17 15:03 ` [PATCH 7/9] add a user namespace owner of ipc ns Serge E. Hallyn
2011-02-18 3:19 ` Eric W. Biederman
2011-02-18 23:59 ` Andrew Morton
2011-02-19 17:57 ` Daniel Lezcano
[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
2011-02-17 15:03 ` [PATCH 8/9] user namespaces: convert several capable() calls Serge E. Hallyn
2011-02-18 1:51 ` Eric W. Biederman
2011-02-19 19:07 ` Daniel Lezcano
[not found] ` <20110217150356.GH26395-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-18 1:51 ` Eric W. Biederman
2011-02-19 19:07 ` Daniel Lezcano
2011-02-17 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
2011-02-24 3:24 ` Serge E. Hallyn
2011-02-24 5:08 ` Andrew Morton
[not found] ` <20110224032415.GA5555-7LNsyQBKDXoIagZqoN9o3w@public.gmane.org>
2011-02-24 5:08 ` Andrew Morton
[not found] ` <20110218155935.66e7782d.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2011-02-24 3:24 ` Serge E. Hallyn
2011-02-19 19:22 ` Daniel Lezcano
2011-02-18 0:21 ` userns: targeted capabilities v5 Andrew Morton
2011-02-18 3:53 ` Eric W. Biederman
2011-02-18 4:28 ` Serge E. Hallyn
[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
[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
[not found] ` <29677.1298462729-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 13:58 ` Serge E. Hallyn
2011-02-23 13:58 ` Serge E. Hallyn [this message]
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
[not found] ` <890.1298473574-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2011-02-23 15:45 ` Eric W. Biederman
2011-02-23 15:45 ` Eric W. Biederman
2011-02-23 15:53 ` Serge E. Hallyn
2011-02-23 19:24 ` Casey Schaufler
[not found] ` <4D655EE4.6030707-iSGtlc1asvQWG2LlvL+J4A@public.gmane.org>
2011-02-23 20:55 ` Eric W. Biederman
2011-02-23 20:55 ` Eric W. Biederman
2011-02-23 21:37 ` Casey Schaufler
[not found] ` <4D657E0C.3010102-iSGtlc1asvQWG2LlvL+J4A@public.gmane.org>
2011-02-24 6:56 ` Eric W. Biederman
2011-02-24 6:56 ` Eric W. Biederman
[not found] ` <m1k4gqlbdm.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2011-02-23 21:37 ` Casey Schaufler
[not found] ` <20110223155328.GA21266-BtbdaCaBcfOTUehee3IRJA@public.gmane.org>
2011-02-23 19:24 ` Casey Schaufler
[not found] ` <m162sasqj6.fsf-+imSwln9KH6u2/kzUuoCbdi2O/JbrIOy@public.gmane.org>
2011-02-23 15:53 ` Serge E. Hallyn
[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
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