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 <[email protected]> Fixes: c12b395 ("gre: Support GRE over IPv6") Signed-off-by: huaibin Wang <[email protected]> Signed-off-by: Nicolas Dichtel <[email protected]> Signed-off-by: David S. Miller <[email protected]>
josf · Aug 25, 2015 · d425729 · d425729
1 parent 8b63ec1
commit d425729
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
@@ -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);
 }