linux-kernel - Re: [REVIEW][PATCH] vfs: Lock in place mounts from more privileged users

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Message-ID: <20130724124933.GA16517@mail.hallyn.com>
Date:	Wed, 24 Jul 2013 12:49:33 +0000
From:	"Serge E. Hallyn" <serge@...lyn.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Linux Containers <containers@...ts.linux-foundation.org>,
	"Serge E. Hallyn" <serge@...lyn.com>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [REVIEW][PATCH] vfs: Lock in place mounts from more privileged
 users

Quoting Eric W. Biederman (ebiederm@...ssion.com):
> 
> Serge does this patch break lxc?  I think all should be well but I want
> to make certain there is not some hidden case where this fundamentaly
> breaks some functionality.

I haven't yet tried.  I'll build and test a kernel today.  I'm pretty
sure all the child's mounts are done after clone, so I *think* the worst
case will be that the unmounting of put_old after pivot_root() will
be noisy.  Will let you know.

-serge
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