linux-kernel - Re: [BREAKAGE] Since 4.18, kernel sets SB_I_NODEV implicitly on userns mounts, breaking systemd-nspawn

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Message-ID: <828415b6-9fee-96bd-b6b0-fd4450df97a8@mageia.org>
Date:   Sun, 23 Dec 2018 12:54:11 +0200
From:   Thomas Backlund <tmb@...eia.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        <christian.brauner@...onical.com>
CC:     <nix.or.die@...il.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        <ellierevves@...il.com>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        <seth.forshee@...onical.com>, <stable@...r.kernel.org>,
        <gregkh@...uxfoundation.org>
Subject: Re: [BREAKAGE] Since 4.18, kernel sets SB_I_NODEV implicitly on
 userns mounts, breaking systemd-nspawn

Den 23-12-2018 kl. 01:28, skrev Linus Torvalds:
> On Sat, Dec 22, 2018 at 3:07 PM Christian Brauner
> <christian.brauner@...onical.com> wrote:
>>
>> However, for this case should I resend the revert?
> 
> Since I was pointed at the original email thread, I just picked it up
> from there directly. It still applied cleanly, nothing had changed in
> that area.
> 
>                  Linus
> 

This should also be picked up for 4.19 lts

Greg, it's now upstream as:

 From 94f82008ce30e2624537d240d64ce718255e0b80 Mon Sep 17 00:00:00 2001
From: Christian Brauner <christian@...uner.io>
Date: Thu, 5 Jul 2018 17:51:20 +0200
Subject: Revert "vfs: Allow userns root to call mknod on owned filesystems."

--
Thomas