netdev - Re: [PATCH] net: use net->count to check whether a netns is alive or not

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Message-Id: <20170313.160316.2050029482820012246.davem@davemloft.net>
Date:   Mon, 13 Mar 2017 16:03:16 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     avagin@...nvz.org
Cc:     netdev@...r.kernel.org, grawity@...il.com, stable@...r.kernel.org
Subject: Re: [PATCH] net: use net->count to check whether a netns is alive
 or not

From: Andrei Vagin <avagin@...nvz.org>
Date: Sun, 12 Mar 2017 21:36:18 -0700

> The previous idea was to check whether a net namespace is in
> net_exit_list or not. It doesn't work, because net->exit_list is used in
> __register_pernet_operations and __unregister_pernet_operations where
> all namespaces are added to a temporary list to make cleanup in a error
> case, so list_empty(&net->exit_list) always returns false.
> 
> Reported-by: Mantas Mikulėnas <grawity@...il.com>
> Fixes: 002d8a1a6c11 ("net: skip genenerating uevents for network namespaces that are exiting")
> Signed-off-by: Andrei Vagin <avagin@...nvz.org>

Applied and queued up for -stable, thanks.