linux-kernel - cifs mount regression in 4.8 and 4.4 stable

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Date:   Thu, 22 Sep 2016 10:09:18 -0500
From:   Seth Forshee <seth.forshee@...onical.com>
To:     Steve French <sfrench@...ba.org>, Aurelien Aptel <aaptel@...e.com>
Cc:     Sachin Prabhu <sprabhu@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-cifs@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: cifs mount regression in 4.8 and 4.4 stable

We've received reports from users of a cifs mount regression in our
4.4-based kernel, e.g. [1]. It is fixed by reverting the follwing commit
from 4.8 which was applied to 4.4 stable:

 a6b5058 fs/cifs: make share unaccessible at root level mountable

Testing against 4.8-rc7 shows that the problem is present there as well.

Thanks,
Seth

[1] http://bugs.launchpad.net/bugs/1626112