linux-kernel - Re: [REVIEW][PATCH 1/2] userns: Better restrictions on when proc and sysfs can be mounted

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Message-ID: <CALCETrWPDzuoaJp2ko5jAbwYUBqSdPjvO5uGo-gZVsS4Wm1PKQ@mail.gmail.com>
Date:	Tue, 27 Aug 2013 14:47:07 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Linux Containers <containers@...ts.linux-foundation.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [REVIEW][PATCH 1/2] userns: Better restrictions on when proc and
 sysfs can be mounted

On Tue, Aug 27, 2013 at 2:44 PM, Eric W. Biederman
<ebiederm@...ssion.com> wrote:
>
> Rely on the fact that another flavor of the filesystem is already
> mounted and do not rely on state in the user namespace.

Possibly dumb question: does this check whether the pre-existing mount
has hidepid set?

--Andy
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