[PATCH 3.10 088/104] Revert "ip6tnl: fix use after free of fb_tnl_dev"

Greg Kroah-Hartman
2014-02-04T21:03:46Z

From: Nicolas Dichtel <nicolas.dichtel@6wind.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@6wind.com>
Reported-by: Steven Rostedt <srostedt@redhat.com>
Tested-by: Steven Rostedt <srostedt@redhat.com> (and our entire MRG team)
Tested-by: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com>
Tested-by: John Kacur <jkacur@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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);
}