2.6.9-rc1 oopses here reproducibly during boot after bringing up the sit3 tunneling device: Unable to handle kernel NULL pointer dereference... ipv6_get_hoplimit+24, ipv6_rout_add+1367, inet6_rtm_newroute+63, rtnetlink_rcv+587, netlink_data_ready+22, netlink_sendskb+46, netlink_sendmsg+703, sock_sendmsg+174, __mark_inode_dirty+52, verify_iovec+75, sys_sendmsg+528, cap_vm_enough_memory+14, do_page_fault +497, netlink_autobind+184, sys_getsockname+135, sock_map_fd+376, netlink_create+207, system_call+126 Normally with 2.6.8.1 and before my routing table looks like this: Kernel IPv6 routing table Destination Next Hop Flags Metric Ref Use Iface ::1/128 :: U 0 104 2 lo 2000::/128 2000:: UC 0 12 0 sit1 2001:850:306::/128 :: U 0 9 0 lo 2001:850:306::1/128 :: U 0 6 0 lo 2001:850:306::/64 :: U 256 0 0 sit1 3ffe:80ee:14fa::/128 :: U 0 9 0 lo 3ffe:80ee:14fa::1/128 :: U 0 6 0 lo 3ffe:80ee:14fa::/64 :: U 256 0 0 sit2 3ffe:80ee:14fa::/64 :: U 256 0 0 sit3 2000::/3 :: U 1 3 0 sit1 2000::/3 :: U 1 0 0 sit2 2000::/3 :: U 1 0 0 sit3 fe80::/128 :: U 0 0 0 lo fe80::d4ba:6e20/128 :: U 0 0 0 lo fe80::2e0:81ff:fe29:9983/128 :: U 0 0 0 lo fe80::/64 :: U 256 0 0 eth0 fe80::/64 :: U 256 0 0 sit1 fe80::/64 :: U 256 0 0 sit2 fe80::/64 :: U 256 0 0 sit3 ff00::/128 ff00:: UC 0 12 0 eth0 ff00::/8 :: U 256 0 0 eth0 ff00::/8 :: U 256 0 0 sit1 ff00::/8 :: U 256 0 0 sit2 ff00::/8 :: U 256 0 0 sit3