TITLE: BUG: Address IPV6ADDR on device lo is missing its host route.

[  184.801206][ T1191] IPv6: BUG: Address fc00:: on device lo is missing its host route.
[  184.804883][ T4795] lo speed is unknown, defaulting to 1000
[  184.804923][ T4795] syz0: Port: 1 Link ACTIVE
SYZFAIL: failed to recv rpc
fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor)
