linux-kernel - Re: [REVIEW][PATCH 4/6] fs: Allow superblock owner to access do_remount

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Message-ID: <87603d3svh.fsf@xmission.com>
Date:   Thu, 24 May 2018 11:45:06 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Christian Brauner <christian@...uner.io>
Cc:     Linux Containers <containers@...ts.linux-foundation.org>,
        linux-kernel@...r.kernel.org,
        Seth Forshee <seth.forshee@...onical.com>,
        linux-fsdevel@...r.kernel.org
Subject: Re: [REVIEW][PATCH 4/6] fs: Allow superblock owner to access do_remount_sb()

Christian Brauner <christian@...uner.io> writes:

> On Wed, May 23, 2018 at 06:25:36PM -0500, Eric W. Biederman wrote:
>> Superblock level remounts are currently restricted to global
>> CAP_SYS_ADMIN, as is the path for changing the root mount to
>> read only on umount. Loosen both of these permission checks to
>> also allow CAP_SYS_ADMIN in any namespace which is privileged
>> towards the userns which originally mounted the filesystem.
>
> Acked-by: Christian Brauner <christian@...uner.io>
>
>> 
>> Signed-off-by: Seth Forshee <seth.forshee@...onical.com>
>> Acked-by: "Eric W. Biederman" <ebiederm@...ssion.com>
>> Acked-by: Serge Hallyn <serge.hallyn@...onical.com>
>
> Note, I just talked to Serge. This should be Acked-by: Serge Hallyn <serge@...lyn.com>

Now you know how long these patches have been sitting waiting to get
merged.

Eric