Commit d4257295 authored Aug 25, 2015 by huaibin Wang Committed by David S. Miller Aug 25, 2015

ip6_gre: release cached dst on tunnel removal



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 <xeb@mail.ru>
Fixes: c12b395a ("gre: Support GRE over IPv6")
Signed-off-by: huaibin Wang <huaibin.wang@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 8b63ec18

net/ipv6/ip6_gre.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -361,6 +361,7 @@ static void ip6gre_tunnel_uninit(struct net_device *dev)
		struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id);

		ip6gre_tunnel_unlink(ign, t);
		ip6_tnl_dst_reset(t);
		dev_put(dev);
		}

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