Before those patches, packets sent to a vti[6]/xfrm interface via
bpf_redirect() or via an AF_PACKET socket were dropped, mostly because
no dst was attached.

v1 -> v2:
  - remove useless check against skb_dst() in xfrmi_xmit2()
  - keep incrementing tx_carrier_errors in case of route lookup failure

 net/ipv4/ip_vti.c         | 11 +++++++++--
 net/ipv6/ip6_vti.c        | 11 +++++++++--
 net/xfrm/xfrm_interface.c | 28 +++++++++++++++++++++-------
 3 files changed, 39 insertions(+), 11 deletions(-)

Regards,
Nicolas