From: Enrico Weigelt <lkml-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
To: "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Cc: Linux Containers
<containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>
Subject: Re: plan9 semantics on Linux - mount namespaces
Date: Tue, 13 Feb 2018 22:19:48 +0000 [thread overview]
Message-ID: <5633d335-3926-d98f-d6d7-948b1e2a0b2c__23029.3178152808$1518560610$gmane$org@metux.net> (raw)
In-Reply-To: <0f058286-a432-379b-f559-f2fe713807ab-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
On 13.02.2018 22:12, Enrico Weigelt wrote:
CC @containers@lists.linux-foundation.org
> Hi folks,
>
>
> I'm currently trying to implement plan9 semantics on Linux and
> yet sorting out how to do the mount namespace handling.
>
> On plan9, any unprivileged process can create its own namespace
> and mount/bind at will, while on Linux this requires CAP_SYS_ADMIN.
>
> What is the reason for not allowing arbitrary users to create their
> own private mount namespace ? What could go wrong here ?
>
> IMHO, we could allow mount/bind under the following conditions:
>
> * the process is in a private mount namespace
> * no suid-flag is honored (either force all mounts to nosuid or
> completely mask it out)
> * only certain whitelisted filesystems allowed (eg. 9P and FUSE)
>
> Maybe that all could be enabled by a new capability.
>
>
> any suggestions ?
>
>
> --mtx
>
--
Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@metux.net -- +49-151-27565287
_______________________________________________
Containers mailing list
Containers@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/containers
next parent reply other threads:[~2018-02-13 22:19 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0f058286-a432-379b-f559-f2fe713807ab@metux.net>
[not found] ` <0f058286-a432-379b-f559-f2fe713807ab-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-13 22:19 ` Enrico Weigelt [this message]
[not found] ` <5633d335-3926-d98f-d6d7-948b1e2a0b2c@metux.net>
[not found] ` <5633d335-3926-d98f-d6d7-948b1e2a0b2c-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-13 22:27 ` plan9 semantics on Linux - mount namespaces Aleksa Sarai
2018-02-14 0:01 ` Enrico Weigelt
[not found] ` <39b08c53-3449-3164-c1b1-44ac587dd4ea@metux.net>
[not found] ` <39b08c53-3449-3164-c1b1-44ac587dd4ea-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-14 4:54 ` Aleksa Sarai
2018-02-14 10:18 ` Enrico Weigelt
[not found] ` <9c097fd9-3035-d5be-a829-fc18e7734f18@metux.net>
[not found] ` <9c097fd9-3035-d5be-a829-fc18e7734f18-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-14 10:24 ` Aleksa Sarai
[not found] ` <20180214102410.dxgbayb4i76h5exo@gordon>
2018-02-14 11:27 ` Enrico Weigelt
[not found] ` <24ddea73-5c84-e098-caae-8a4c14834cbd-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-14 11:30 ` Richard Weinberger
[not found] ` <CAFLxGvzxLP_UTQbwEY99bQfyftWzZHwaOP+WrzJ8099EKtbVLg@mail.gmail.com>
[not found] ` <CAFLxGvzxLP_UTQbwEY99bQfyftWzZHwaOP+WrzJ8099EKtbVLg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-02-14 12:38 ` Enrico Weigelt
[not found] ` <4864d279-9a3f-eaf4-c297-ea34be604e41-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-14 12:53 ` Richard Weinberger
[not found] ` <2658681.ustYaP9yci@blindfold>
2018-02-14 14:03 ` Enrico Weigelt
[not found] ` <a2a6f189-008e-38f2-afcb-b9393d8d440a-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-14 14:19 ` Richard Weinberger
2018-02-14 15:02 ` Enrico Weigelt
[not found] ` <4f620eb7-c00c-487b-2e06-8cc4c97af38c@metux.net>
[not found] ` <4f620eb7-c00c-487b-2e06-8cc4c97af38c-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-14 15:17 ` Richard Weinberger
2018-02-14 17:21 ` Enrico Weigelt
[not found] ` <e924b563-44c6-d678-a6cc-1181f4b820d5@metux.net>
[not found] ` <4042675.OEy7g9C5ya@blindfold>
2018-02-14 18:01 ` Enrico Weigelt
[not found] ` <794929ce-0ecb-4c93-d51e-e94fcf749cfa@metux.net>
[not found] ` <794929ce-0ecb-4c93-d51e-e94fcf749cfa-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-14 18:12 ` Richard Weinberger
2018-02-14 18:32 ` Enrico Weigelt
[not found] ` <e924b563-44c6-d678-a6cc-1181f4b820d5-EcKl7qYKIbxeoWH0uzbU5w@public.gmane.org>
2018-02-14 17:50 ` Richard Weinberger
2018-02-14 20:39 ` Aleksa Sarai
2018-02-16 18:26 ` Eric W. Biederman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='5633d335-3926-d98f-d6d7-948b1e2a0b2c__23029.3178152808$1518560610$gmane$org@metux.net' \
--to=lkml-eckl7qykibxeowh0uzbu5w@public.gmane.org \
--cc=containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).