linux-kernel - [PATCH 3.10 088/104] Revert "ip6tnl: fix use after free of fb_tnl

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Date:	Tue,  4 Feb 2014 13:02:31 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Steven Rostedt <srostedt@...hat.com>,
	"Luis Claudio R. Goncalves" <lgoncalv@...hat.com>,
	John Kacur <jkacur@...hat.com>
Subject: [PATCH 3.10 088/104] Revert "ip6tnl: fix use after free of fb_tnl_dev"

3.10-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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/ipv6/ip6_tunnel.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1711,6 +1711,8 @@ static void __net_exit ip6_tnl_destroy_t
 		}
 	}
 
+	t = rtnl_dereference(ip6n->tnls_wc[0]);
+	unregister_netdevice_queue(t->dev, &list);
 	unregister_netdevice_many(&list);
 }
 


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