linux-kernel - Re: [PATCH] fs/namespace: fix unprivileged mount propagation

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Message-ID: <CAHk-=wh+OWQ2s-NZC4RzfHtgNfhV9sbtP6dXV4WnsVRQ3A3hnA@mail.gmail.com>
Date:   Mon, 17 Jun 2019 11:50:13 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Christian Brauner <christian@...uner.io>
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH] fs/namespace: fix unprivileged mount propagation

On Mon, Jun 17, 2019 at 11:47 AM Christian Brauner <christian@...uner.io> wrote:
>
> When propagating mounts across mount namespaces owned by different user
> namespaces it is not possible anymore to move or umount the mount in the
> less privileged mount namespace.

I will wait a short while in the hope of getting Al's ack for this,
but since it looks about as good as it likely can be, I suspect I'll
just apply it later today even without such an ack..

                    Linus