From: James Morris <jmorris@namei.org>
To: Stefan Berger <stefanb@linux.vnet.ibm.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>,
"Eric W. Biederman" <ebiederm@xmission.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
containers@lists.linux-foundation.org, lkp@01.org,
linux-kernel@vger.kernel.org, zohar@linux.vnet.ibm.com,
tycho@docker.com, James.Bottomley@HansenPartnership.com,
vgoyal@redhat.com, christian.brauner@mailbox.org,
amir73il@gmail.com, linux-security-module@vger.kernel.org,
casey@schaufler-ca.com
Subject: Re: [PATCH v2] xattr: Enable security.capability in user namespaces
Date: Tue, 18 Jul 2017 17:01:36 +1000 (AEST) [thread overview]
Message-ID: <alpine.LRH.2.20.1707181659030.5209@namei.org> (raw)
In-Reply-To: <29fdda5e-ed4a-bcda-e3cc-c06ab87973ce@linux.vnet.ibm.com>
On Thu, 13 Jul 2017, Stefan Berger wrote:
> A file shared by 2 containers, one mapping root to uid=1000, the other mapping
> root to uid=2000, will show these two xattrs on the host (init_user_ns) once
> these containers set xattrs on that file.
I may be missing something here, but what happens when say the uid=2000
container and associated user is deleted from the system, then another is
created with the same uid?
Won't this mean that you have unexpected capabilities turning up in the
new container?
--
James Morris
<jmorris@namei.org>
next prev parent reply other threads:[~2017-07-18 7:02 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-11 15:05 [PATCH v2] Enable namespaced file capabilities Stefan Berger
2017-07-11 15:05 ` [PATCH v2] xattr: Enable security.capability in user namespaces Stefan Berger
2017-07-11 17:12 ` Serge E. Hallyn
2017-07-12 0:15 ` Stefan Berger
2017-07-12 0:47 ` Serge E. Hallyn
2017-07-12 3:45 ` Serge E. Hallyn
2017-07-12 11:35 ` Stefan Berger
2017-07-12 17:32 ` Serge E. Hallyn
2017-07-12 7:59 ` James Morris
2017-07-12 13:25 ` Eric W. Biederman
2017-07-12 17:03 ` Serge E. Hallyn
2017-07-12 22:20 ` James Morris
2017-07-13 0:33 ` Eric W. Biederman
2017-07-13 1:01 ` Serge E. Hallyn
2017-07-12 23:13 ` Eric W. Biederman
2017-07-13 0:43 ` Serge E. Hallyn
2017-07-13 0:44 ` Stefan Berger
2017-07-13 1:15 ` Theodore Ts'o
2017-07-13 2:34 ` Serge E. Hallyn
2017-07-13 12:11 ` Eric W. Biederman
2017-07-13 16:40 ` Theodore Ts'o
2017-07-13 17:05 ` Stefan Berger
2017-07-13 17:39 ` Eric W. Biederman
2017-07-13 19:14 ` Theodore Ts'o
2017-07-13 19:41 ` Serge E. Hallyn
2017-07-13 21:17 ` Serge E. Hallyn
2017-07-18 7:01 ` James Morris [this message]
2017-07-18 12:12 ` Stefan Berger
2017-07-18 13:26 ` Eric W. Biederman
2017-07-18 23:13 ` Serge E. Hallyn
2017-07-13 17:14 ` Eric W. Biederman
2017-07-13 17:33 ` Stefan Berger
2017-07-13 17:49 ` Eric W. Biederman
2017-07-13 19:48 ` Serge E. Hallyn
2017-07-13 21:12 ` Eric W. Biederman
[not found] ` <9a3010e5-ca2b-5e7a-656b-fcc14f7bec4e@linux.vnet.ibm.com>
2017-07-14 0:38 ` Eric W. Biederman
2017-07-14 11:32 ` Stefan Berger
2017-07-14 12:04 ` Eric W. Biederman
2017-07-14 12:39 ` Stefan Berger
2017-07-14 13:34 ` Serge E. Hallyn
2017-07-14 15:22 ` Stefan Berger
2017-07-14 17:35 ` Serge E. Hallyn
2017-07-14 18:17 ` Eric W. Biederman
2017-07-14 18:48 ` Mimi Zohar
2017-07-14 18:52 ` James Bottomley
2017-07-14 20:03 ` Mimi Zohar
2017-07-14 20:39 ` James Bottomley
2017-07-14 21:34 ` Theodore Ts'o
2017-07-14 23:22 ` Eric W. Biederman
2017-07-14 23:29 ` Mimi Zohar
2017-07-14 23:53 ` Eric W. Biederman
2017-07-14 19:29 ` Theodore Ts'o
2017-07-14 19:43 ` Mimi Zohar
[not found] ` <xagsmtp2.20170714182525.6604@vmsdvm4.vnet.ibm.com>
2017-07-14 19:26 ` Mimi Zohar
2017-07-15 0:02 ` Eric W. Biederman
[not found] ` <xagsmtp3.20170715001054.9173@uk1vsc.vnet.ibm.com>
2017-07-16 11:25 ` Mimi Zohar
2017-07-26 3:00 ` Serge E. Hallyn
2017-07-26 13:57 ` Mimi Zohar
2017-07-14 17:36 ` Eric W. Biederman
2017-07-14 19:22 ` Stefan Berger
2017-07-13 21:21 ` Serge E. Hallyn
2017-07-13 21:13 ` Serge E. Hallyn
2017-07-12 17:53 ` Vivek Goyal
2017-07-12 19:19 ` Stefan Berger
2017-07-14 23:41 ` Eric W. Biederman
2017-07-15 21:27 ` Stefan Berger
2017-07-17 18:58 ` Vivek Goyal
2017-07-17 20:50 ` Stefan Berger
2017-07-18 11:48 ` Vivek Goyal
2017-07-18 12:05 ` Stefan Berger
2017-07-18 12:30 ` Vivek Goyal
2017-07-18 12:36 ` Vivek Goyal
2017-07-18 13:29 ` Eric W. Biederman
2017-07-18 13:21 ` Stefan Berger
2017-07-18 14:57 ` Vivek Goyal
2017-07-18 16:11 ` Stefan Berger
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