tcp: do not use ipv6 header for ipv4 flow
[ Upstream commit 89e4130939a20304f4059ab72179da81f5347528 ] When a dual stack tcp listener accepts an ipv4 flow, it should not attempt to use an ipv6 header or tcp_v6_iif() helper. Fixes: 1397ed35 ("ipv6: add flowinfo for tcp6 pkt_options for all cases") Fixes: df3687ff ("ipv6: add the IPV6_FL_F_REFLECT flag to IPV6_FL_A_GET") Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by: NEric Dumazet <edumazet@google.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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