netdev - Re: [PATCH] netns: add /proc/*/net/id symlink

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Message-ID: <20110523014751.GB2351982@jupiter.n2.diac24.net>
Date:	Mon, 23 May 2011 03:47:51 +0200
From:	David Lamparter <equinox@...c24.net>
To:	David Lamparter <equinox@...c24.net>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Alexey Dobriyan <adobriyan@...il.com>, davem@...emloft.net,
	netdev@...r.kernel.org,
	Linux Containers <containers@...ts.osdl.org>
Subject: Re: [PATCH] netns: add /proc/*/net/id symlink

On Mon, May 23, 2011 at 03:43:03AM +0200, David Lamparter wrote:
> Then I make a mount namespace, bind-mount the net namespace, bind mount
> the mount namespace and terminate all processes that reference it (yes
> this does work, i just checked [!]).

Actually, Eric, bind-mounting a mount namespace inside itself should
probably be forbidden? No idea if you changed that (running a year-old
version of your patches here). Not only can you lose network namespaces
inside those self-referential mount namespaces but also references to
block devices, unix socket connections, etc. pp.


-David

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