Golang 端口扫描器在 Linux 系统下无法扫描出全部端口，该如何解决？

ulimit -shn 10000

package main

import (
    "fmt"
    "net"
    "time"
    "sync"
)

type Job struct {
    host string
    port int
}

type Result struct {
    job    Job
    status bool
}

var success uint32
var fail uint32
var successMux sync.Mutex
var failMux sync.Mutex

var jobs = make(chan Job)
var results = make(chan Result)

func worker(wg *sync.WaitGroup) {
    for job := range jobs {
        _, err := net.DialTimeout("tcp", fmt.Sprintf("%s:%d", job.host, job.port), time.Millisecond*5500)
        if err != nil {
            failMux.Lock()
            fail++
            failMux.Unlock()
            if job.port == 50051 {
                fmt.Println("I am port 50051, error:", err.Error())
            }
            results <- Result{job, false}
        } else {
            successMux.Lock()
            success++
            successMux.Unlock()
            results <- Result{job, true}
        }
    }
    wg.Done()
}

const host = "127.0.0.1"

func main() {
    wg := sync.WaitGroup{}

    go func() {
        for i := 1; i <= 65535; i++ {
            jobs <- Job{host, i}
        }
        close(jobs)
    }()

    go func() {
        for result := range results {
            if result.status {
                fmt.Println(result.job, "open")
            }
        }
    }()

    for i := 0; i < 4500; i++ {
        wg.Add(1)
        go worker(&wg)
    }
    wg.Wait()

    fmt.Println("success is ", success)
    fmt.Println("fail is ", fail)
}