3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: huaibin Wang <huaibin.w...@6wind.com>
[ Upstream commit d4257295ba1b389c693b79de857a96e4b7cd8ac0 ]
When a tunnel is deleted, the cached dst entry should be released.
This problem may prevent the removal of a netns (seen with a x-netns IPv6
gre tunnel):
unregister_netdevice: waiting for lo to become free. Usage count = 3
CC: Dmitry Kozlov <x...@mail.ru>
Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Signed-off-by: huaibin Wang <huaibin.w...@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dich...@6wind.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
net/ipv6/ip6_gre.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -359,6 +359,7 @@ static void ip6gre_tunnel_uninit(struct
struct ip6gre_net *ign = net_generic(net, ip6gre_net_id);
ip6gre_tunnel_unlink(ign, netdev_priv(dev));
+ ip6_tnl_dst_reset(netdev_priv(dev));
dev_put(dev);
}
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