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: <20181224080836.GA12568@kroah.com>
Date:   Mon, 24 Dec 2018 09:08:36 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Thomas Backlund <tmb@...eia.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        christian.brauner@...onical.com, 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
Subject: Re: [BREAKAGE] Since 4.18, kernel sets SB_I_NODEV implicitly on
 userns mounts, breaking systemd-nspawn

On Sun, Dec 23, 2018 at 12:54:11PM +0200, Thomas Backlund wrote:
> 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."

Now queued up, thanks.

greg k-h