From: Aleksa Sarai <asarai@suse.de>
To: Enrico Weigelt <lkml@metux.net>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Linux Containers <containers@lists.linux-foundation.org>
Subject: Re: plan9 semantics on Linux - mount namespaces
Date: Wed, 14 Feb 2018 21:24:10 +1100 [thread overview]
Message-ID: <20180214102410.dxgbayb4i76h5exo@gordon> (raw)
In-Reply-To: <9c097fd9-3035-d5be-a829-fc18e7734f18@metux.net>
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On 2018-02-14, Enrico Weigelt <lkml@metux.net> wrote:
> On 14.02.2018 04:54, Aleksa Sarai wrote:
>
> > It depends how old your kernel is and what distro you use. Arch Linux >
> > disables user namespaces entirely, Debian requires that you set a
> sysctl> to enable unprivileged user namespaces, and RHEL requires you to
> set> both a sysctl and a kernel boot-flag. Also check how old your kernel
> is> (unprivileged user namespace support was added in 3.8).
> Just tried on a mainline kernel (4.15). Same problem:
>
> root@alphabox:~ unshare -U -r
> unshare: unshare(0x14000000): Invalid argument
> root@alphabox:/proc/sys/user cat max_user_namespaces
> 5922
What distribution are you using and which release? Also, are you trying
to do this inside a Docker container or something similar (Docker has
seccomp filters that block CLONE_NEWUSER by default, for instance).
--
Aleksa Sarai
Senior Software Engineer (Containers)
SUSE Linux GmbH
<https://www.cyphar.com/>
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next prev parent reply other threads:[~2018-02-14 10:24 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-13 22:12 Enrico Weigelt
2018-02-13 22:19 ` Enrico Weigelt
2018-02-13 22:27 ` Aleksa Sarai
2018-02-14 0:01 ` Enrico Weigelt
2018-02-14 4:54 ` Aleksa Sarai
2018-02-14 10:18 ` Enrico Weigelt
2018-02-14 10:24 ` Aleksa Sarai [this message]
2018-02-14 11:27 ` Enrico Weigelt
2018-02-14 11:30 ` Richard Weinberger
2018-02-14 12:38 ` Enrico Weigelt
2018-02-14 12:53 ` Richard Weinberger
2018-02-14 14:03 ` Enrico Weigelt
2018-02-14 14:19 ` Richard Weinberger
2018-02-14 15:02 ` Enrico Weigelt
2018-02-14 15:17 ` Richard Weinberger
2018-02-14 17:21 ` Enrico Weigelt
2018-02-14 17:50 ` Richard Weinberger
2018-02-14 18:01 ` Enrico Weigelt
2018-02-14 18:12 ` Richard Weinberger
2018-02-14 18:32 ` Enrico Weigelt
2018-02-14 20:39 ` Aleksa Sarai
2018-02-16 18:26 ` Eric W. Biederman
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