BUG in ssh-shellhost.exe

Prerequisites

• Write a descriptive title.
• Make sure you are able to repro it on the latest version
• Search the existing issues.

Steps to reproduce

Server side-------------------
C:\Program Files\OpenSSH>"C:\Program Files\OpenSSH"sshd -ddd
...
debug1: sshd version OpenSSH_for_Windows_9.4, LibreSSL 3.7.3
...
debug3: shell: "c:\\windows\\system32\\cmd.exe"
debug3: shell_option: /c
debug3: couldn't find CreatePseudoConsole() in kernel32.dll dll
debug3: This windows OS doesn't support conpty
debug3: pty commandline: "C:\\Program Files\\OpenSSH\\ssh-shellhost.exe" ---pty "c:\\windows\\system32\\cmd.exe"

Client side----------------------------------
mode con cols=80 lines=9999
ssh -vvv Konstantin.Abakumov@127.0.0.1
...
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_9.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_for_Windows_9.4
...
debug3: client_repledge: enter
debug1: ENABLE_VIRTUAL_TERMINAL_INPUT is supported. Reading the VTSequence from console
debug3: couldn't find CreatePseudoConsole() in kernel32.dll dll
debug3: This windows OS doesn't support conpty
debug1: ENABLE_VIRTUAL_TERMINAL_PROCESSING is supported. Console supports the ansi parsing
....

uf\konstantin.abakumov@WUFRS0661151 C:\Users\user>mode con

Состояние устройства CON:

Строки:                9999
Столбцы:               80
Скорость клавиатуры:   31
Задержка клавиатуры:   1
Кодовая страница:      866

------------------------------------ ssh-shellhost.exe work well on start-----------------------------------------------

------------------------------------I enlarge width of console-----------------------------------------------

Client side----------------------------------
debug2: client_check_window_change: changed
debug2: channel 0: request window-change confirm 0
debug3: send packet: type 98
debug2: client_check_window_change: changed
debug2: channel 0: request window-change confirm 0
debug3: send packet: type 98
debug2: client_check_window_change: changed
debug2: channel 0: request window-change confirm 0
debug3: send packet: type 98
debug2: client_check_window_change: changed
debug2: channel 0: request window-change confirm 0
debug3: send packet: type 98

Server side-------------------
debug3: receive packet: type 98
debug1: server_input_channel_req: channel 0 request window-change reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req window-change
debug3: receive packet: type 98
debug1: server_input_channel_req: channel 0 request window-change reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req window-change

Client side----------------------------------
uf\konstantin.abakumov@WUFRS0661151 C:\Users\user>mode con

Состояние устройства CON:

Строки:                9999
Столбцы:               80
Скорость клавиатуры:   31
Задержка клавиатуры:   1
Кодовая страница:      866

------------------------------------Nothing happend!!! BUG in ssh-shellhost.exe -----------------------------------------------

exit
------------------------------------End session-----------------------------------------------
------------------------------------New session with same console-----------------------------------------------

ssh Konstantin.Abakumov@127.0.0.1
uf\konstantin.abakumov@WUFRS0661151 C:\Users\user>mode con

Состояние устройства CON:

Строки:                9999
Столбцы:               102
Скорость клавиатуры:   31
Задержка клавиатуры:   1
Кодовая страница:      866    

------------------------------------ ssh-shellhost.exe work well on start-----------------------------------------------

Expected behavior

After enlarge width of console
Columns:               102

Actual behavior

Columns:               80

Error details

The width of the console on the server side does not change

Environment data

Name                           Value
----                           -----
PSVersion                      5.1.14393.5582
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.14393.5582
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Version

OpenSSH_for_Windows_9.4, LibreSSL 3.7.3

Visuals

No response

Reproduce the session using sshd -ddd and ssh-shellhost.exe, then trace how the server handles the window-change requests shown in the report. Compare the reported 80-column session with the expected 102-column result; done means the server-side console width updates after the client is resized.