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Message-Id: <1391773652-25214-226-git-send-email-luis.henriques@canonical.com>
Date:	Fri,  7 Feb 2014 11:47:24 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.11 225/233] Revert "ip6tnl: fix use after free of fb_tnl_dev"

3.11.10.4 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nicolas Dichtel <nicolas.dichtel@...nd.com>

[ No relevant upstream commit. ]

This reverts commit 22c3ec552c29cf4bd4a75566088950fe57d860c4.

This patch is not the right fix, it introduces a memory leak when a netns is
destroyed (the FB device is never deleted).

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
Reported-by: Steven Rostedt <srostedt@...hat.com>
Tested-by: Steven Rostedt <srostedt@...hat.com> (and our entire MRG team)
Tested-by: "Luis Claudio R. Goncalves" <lgoncalv@...hat.com>
Tested-by: John Kacur <jkacur@...hat.com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 net/ipv6/ip6_tunnel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 85416a0..cf5d490 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1717,6 +1717,8 @@ static void __net_exit ip6_tnl_destroy_tunnels(struct ip6_tnl_net *ip6n)
 		}
 	}
 
+	t = rtnl_dereference(ip6n->tnls_wc[0]);
+	unregister_netdevice_queue(t->dev, &list);
 	unregister_netdevice_many(&list);
 }
 
-- 
1.8.3.2

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