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From: zimoun <zimon.toutoune@gmail.com>
To: "Vagrant Cascadian" <vagrant@debian.org>,
	"Ludovic Courtès" <ludo@gnu.org>, "Marius Bakke" <marius@gnu.org>
Cc: Guix Devel <guix-devel@gnu.org>,
	45069@debbugs.gnu.org,
	Paul Garlick <pgarlick@tourbillion-technology.com>,
	Jesse Dowell <jesse.dowell@gmail.com>
Subject: Re: bug#45069: Guix System: unprivileged user cannot create user namespaces?
Date: Mon, 07 Dec 2020 21:03:58 +0100	[thread overview]
Message-ID: <86360h5qoh.fsf@gmail.com> (raw)
In-Reply-To: <87eek1sdpo.fsf@yucca>

Hi Vagrant,

Sorry if I am naive, I am trying to understand and it appears that
pieces are missing in my bag. :-)


On Mon, 07 Dec 2020 at 09:55, Vagrant Cascadian <vagrant@debian.org> wrote:

> The /proc/sys/kernel_unprivileged_userns_clone file is specific to
> Debian and Ubuntu packaged linux kernel; it is a patchset not applied
> upstream, as far as I am aware. I'm not sure if other distros support
> disabling and enabling this feature using this mechanism.

Thanks.  I still do not understand the message from Guix System:

--8<---------------cut here---------------start------------->8---
~/co/guix (master)$ guix environment -C guix
guix environment: error: cannot create container: unprivileged user cannot create user namespaces
guix environment: error: please set /proc/sys/kernel/unprivileged_userns_clone to "1"
--8<---------------cut here---------------end--------------->8---

(see
<https://yhetil.org/guix/e5c86d238ca5174b745b8ea6cb0cb6ad6b20aa5e.camel@yasuaki.com>)

Why does this appear if «set /proc/sys/kernel/unprivileged_userns_clone to "1"» 
does not make sense on Guix System?


Then Tobias answered: (see <https://yhetil.org/guix/87k0tux63a.fsf@nckx>)

        yasu 写道:
        > Now, I don't use Debian at all (I use Guix System) and do you 
        > think
        > this is a Bug in Guix (in that this Debian specific word should 
        > never
        > even be mentioned in Guix?)

        It's not Debian-specific.  It is a bug in Guix.

        It should try to create a namespace and properly report an error 
        iff that fails, not prematurely abort after farting about in 
        /proc.

        A separate unprivileged-user-namespace-supported? is broken by 
        design.  Reverting commit 8bc5ca5 works around this but it wasn't 
        to blame.

so I miss why does a similar patch as,

>   https://salsa.debian.org/kernel-team/linux/-/blob/master/debian/patches/debian/add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by-default.patch

is not applied to Guix System?  Is it because a technical or else reason
behind?  Or is it simply because no one takes the time to fix the
problem?



All the best,
simon


  reply	other threads:[~2020-12-07 20:06 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-04 15:52 guix environment: error: cannot create container: unprivileged user cannot create user namespaces yasu
2020-12-04 16:04 ` Ricardo Wurmus
2020-12-04 16:29   ` Yasuaki Kudo
2020-12-04 16:32 ` zimoun
2020-12-04 18:55   ` Pjotr Prins
2020-12-04 20:44     ` Yasuaki Kudo
2020-12-05  0:20     ` yasu
2020-12-06 12:41       ` BUG: " yasu
2020-12-06 16:16         ` bug#45069: " Tobias Geerinckx-Rice via Bug reports for GNU Guix
2020-12-06 16:56         ` zimoun
2020-12-06 20:51           ` yasu
2021-01-06 10:49             ` raingloom
2020-12-06 20:54           ` bug#45069: " Jesse Dowell
2020-12-07 11:57             ` Pierre Neidhardt
2020-12-07 12:29               ` Paul Garlick
2020-12-07 12:41                 ` Yasuaki Kudo
2020-12-07 17:13                 ` Pierre Neidhardt
2020-12-07 17:35                   ` bug#45069: Guix System: unprivileged user cannot create user namespaces? zimoun
2020-12-07 17:55                     ` Vagrant Cascadian
2020-12-07 20:03                       ` zimoun [this message]
2020-12-08  3:20                       ` Bengt Richter
2020-12-07 19:50                   ` bug#45069: BUG: Re: guix environment: error: cannot create container: unprivileged user cannot create user namespaces Paul Garlick
2020-12-07 20:35                     ` Pierre Neidhardt
2020-12-07 21:09                       ` zimoun
2021-01-04  9:11                       ` Pierre Neidhardt
2020-12-07 13:26               ` zimoun

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