geneve: fix hlist corruption
It's not a good idea to add the same hlist_node to two different hash lists. This leads to various hard to debug memory corruptions. Fixes: 8ed66f0e ("geneve: implement support for IPv6-based tunnels") Cc: John W. Linville <linville@tuxdriver.com> Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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