[Bug] #10773

RT-Thread Version

tcpserver.c tcpserver_sample.c 例程，客户端连接超过4个就会断开重连

Hardware Type/Architectures

qemu-vexpress-a9

Develop Toolchain

RT-Thread Studio

Describe the bug

FLAGS: UP LINK_UP INTERNET_DOWN DHCP_ENABLE ETHARP BROADCAST IGMP
ip address: 192.168.137.25
gw address: 192.168.137.1
net mask : 255.255.255.0
dns server #0: 192.168.137.1
dns server #1: 0.0.0.0
msh />tcpserver 192.168.137.25 5000
msh />[D/tcpserv] client 5 id connected
[D/tcpserv] client connect:5
[D/tcpserv] client 6 id connected
[D/tcpserv] client connect:6
[D/tcpserv] client 7 id connected
[D/tcpserv] client connect:7
[D/tcpserv] client 8 id connected
[D/tcpserv] client connect:8
[E/tcpserv] recv error
[D/tcpserv] client disconnect:5
[D/tcpserv] socket:5,closed
[D/tcpserv] client 5 id connected
[D/tcpserv] client connect:5

Other additional context

tcpserver.c tcpserver_sample.c 例程，客户端连接超过4个就会断开重连，连接第五个客户端时提示 recv error