masayuki2009 edited a comment on pull request #2899:
URL: https://github.com/apache/incubator-nuttx/pull/2899#issuecomment-790352688
@Donny9 @xiaoxiang781216
Hmmm, it seems that the telnetd does not work after this change.
You can try lm3s6965-ek:discover with qemu.
```
nsh> renew eth0
nsh> ps
PID PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK USED
FILLED COMMAND
0 0 FIFO Kthread N-- Ready 00000000 001024 001024
100.0%! Idle Task
1 224 RR Kthread --- Waiting Signal 00000000 002036 000236
11.5% hpwork
2 60 RR Kthread --- Waiting Signal 00000000 002036 000380
18.6% lpwork
3 100 RR Task --- Running 00000000 002036 001000
49.1% init
4 100 RR Task --- Waiting Semaphore 00000000 002012 000420
20.8% Telnet daemon 0x20006050
nsh> ifconfig
eth0 Link encap:Ethernet HWaddr 00:e0:de:ad:be:ef at UP
inet addr:10.0.2.15 DRaddr:10.0.2.2 Mask:255.255.255.0
IPv4 TCP UDP ICMP
Received 0002 0000 0002 0000
Dropped 0000 0000 0000 0000
IPv4 VHL: 0000 Frg: 0000
Checksum 0000 0000 0000 ----
TCP ACK: 0000 SYN: 0000
RST: 0000 0000
Type 0000 ---- ---- 0000
Sent 0002 0000 0002 0000
Rexmit ---- 0000 ---- ----
nsh> qemu: fatal: Lockup: can't escalate 3 to HardFault (current priority -1)
R00=00000000 R01=00000000 R02=40025000 R03=00000004
R04=00000000 R05=00000003 R06=ffffff6c R07=2000724c
R08=20006178 R09=00000064 R10=00000400 R11=00000001
R12=00000074 R13=ffffff50 R14=00000c7f R15=00000000
XPSR=00000003 ---- A handler
FPSCR: 00000000
Aborted (core dumped)
$ telnet localhost 10023
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
```
esp32-devkitc:wapi_smp has the similar issue.
```
nsh> wapi psk wlan0 wifi-test-24g 1
nsh> wapi essid wlan0 raspi3-g 1
nsh> renew wlan0
nsh> ps
PID CPU PRI POLICY TYPE NPX STATE EVENT SIGMASK STACK USED
FILLED COMMAND
0 0 0 FIFO Kthread N-- Assigned 00000000 002048 000912
44.5% CPU0 IDLE
1 1 0 FIFO Kthread N-- Running 00000000 002048 000608
29.6% CPU1 IDLE
3 --- 100 RR Kthread --- Waiting Signal 00000000 002128 000960
45.1% lpwork
4 1 100 RR Task --- Running 00000000 003152 001712
54.3% init
5 --- 223 RR Kthread --- Waiting Semaphore 00000000 002112 000848
40.1% rt_timer
6 --- 253 RR Kthread --- Waiting MQ empty 00000000 003664 001792
48.9% wifi
7 --- 100 RR Task --- Waiting Semaphore 00000000 002096 000640
30.5% Telnet daemon 0x3ffee6e0
nsh> ifconfig
wlan0 Link encap:Ethernet HWaddr fc:f5:c4:45:a8:9c at UP
inet addr:192.168.10.23 DRaddr:192.168.10.1 Mask:255.255.255.0
IPv4 TCP UDP ICMP
Received 000a 0000 000a 0000
Dropped 0000 0000 0000 0000
IPv4 VHL: 0000 Frg: 0000
Checksum 0000 0000 0000 ----
TCP ACK: 0000 SYN: 0000
RST: 0000 0000
Type 0000 ---- ---- 0000
Sent 0002 0000 0002 0000
Rexmit ---- 0000 ---- ----
nsh> [ 43.300000] up_assert: Assertion failed at file:socket/net_dup2.c
line: 91 task: Telnet daemon
[ 43.300000] xtensa_dumpstate: CPU1:
[ 43.300000] xtensa_registerdump: PC: 400d74e0 PS: 00060a20
[ 43.310000] xtensa_registerdump: A0: 800d7ec1 A1: 3fff3930 A2:
3ffb7d80 A3: 00000001
[ 43.320000] xtensa_registerdump: A4: 3f400e6f A5: 00000001 A6:
00000001 A7: 3ffb0248
[ 43.330000] xtensa_registerdump: A8: 800eddc8 A9: 3fff38b0 A10:
00000000 A11: 3f400b8c
[ 43.330000] xtensa_registerdump: A12: 3fff3920 A13: 3fff3900 A14:
00000008 A15: 3f400a2a
[ 43.340000] xtensa_registerdump: SAR: 0000001f CAUSE: 00000000 VADDR:
00000000
[ 43.350000] xtensa_registerdump: LBEG: 4000c46c LEND: 4000c477 LCNT:
00000000
[ 43.360000] xtensa_registerdump: TMP0: 00000000 TMP1: 00000000
```
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