Cygwin can't ssh (hangs, segmentation fault)?

0

I have cygwin installed on Windows 10 and am seeing that I cannot SSH to any of my servers. When trying to ssh, I just see

➜  ~ ssh -vv me@myserver
OpenSSH_8.4p1, OpenSSL 1.1.1f  31 Mar 2020

and it just hangs from there. Running the command with strace shows...

➜  ~ strace ssh -vv me@myserver
--- Process 29820 created
--- Process 29820 loaded C:\Windows\System32\ntdll.dll at 00007fff58a80000
--- Process 29820 loaded C:\Windows\System32\kernel32.dll at 00007fff58060000
--- Process 29820 loaded C:\Windows\System32\KernelBase.dll at 00007fff55cf0000
--- Process 29820 loaded C:\Windows\System32\sysfer.dll at 0000000075450000
--- Process 29820 loaded C:\cygwin64\bin\cygcrypto-1.1.dll at 00000003ff980000
--- Process 29820 loaded C:\cygwin64\bin\cygwin1.dll at 0000000180040000
--- Process 29820 loaded C:\cygwin64\bin\cyggssapi_krb5-2.dll at 00000003ff1f0000
--- Process 29820 loaded C:\cygwin64\bin\cygz.dll at 00000003fdc80000
--- Process 29820 loaded C:\cygwin64\bin\cygk5crypto-3.dll at 00000003feff0000
--- Process 29820 loaded C:\cygwin64\bin\cygkrb5-3.dll at 00000003fef20000
--- Process 29820 loaded C:\cygwin64\bin\cygkrb5support-0.dll at 00000003fef00000
--- Process 29820 loaded C:\cygwin64\bin\cygcom_err-2.dll at 00000003ffea0000
--- Process 29820 loaded C:\cygwin64\bin\cygintl-8.dll at 00000003ff030000
--- Process 29820 loaded C:\cygwin64\bin\cyggcc_s-seh-1.dll at 00000003ff530000
--- Process 29820 loaded C:\cygwin64\bin\cygiconv-2.dll at 00000003ff080000
    0       0 [main] ssh (29820) **********************************************
  175     175 [main] ssh (29820) Program name: C:\cygwin64\bin\ssh.exe (windows pid 29820)
  186     361 [main] ssh (29820) OS version:   Windows NT-10.0
  228     589 [main] ssh (29820) **********************************************
--- Process 29820 loaded C:\Windows\System32\advapi32.dll at 00007fff58830000
--- Process 29820 loaded C:\Windows\System32\msvcrt.dll at 00007fff56b30000
--- Process 29820 loaded C:\Windows\System32\sechost.dll at 00007fff57ec0000
--- Process 29820 loaded C:\Windows\System32\rpcrt4.dll at 00007fff57a80000
--- Process 29820 loaded C:\Windows\System32\cryptbase.dll at 00007fff55360000
--- Process 29820 loaded C:\Windows\System32\bcryptprimitives.dll at 00007fff55ac0000
18353   18942 [main] ssh (29820) sigprocmask: 0 = sigprocmask (0, 0x0, 0x180324D70)
  600   19542 [main] ssh (29820) open_shared: name shared.5, n 5, shared 0x180030000 (wanted 0x180030000), h 0xF8, *m 6
   74   19616 [main] ssh (29820) user_heap_info::init: heap base 0x800000000, heap top 0x800000000, heap size 0x20000000 (536870912)
   81   19697 [main] ssh (29820) open_shared: name S-1-5-21-749102807-3637569557-2173886209-22663.1, n 1, shared 0x180020000 (wanted 0x180020000), h 0xF4,
*m 6
   68   19765 [main] ssh (29820) user_info::create: opening user shared for 'S-1-5-21-749102807-3637569557-2173886209-22663' at 0x180020000
   64   19829 [main] ssh (29820) user_info::create: user shared version AB1FCCE8
   75   19904 [main] ssh (29820) fhandler_pipe::create: name \\.\pipe\cygwin-e022582115c10879-29820-sigwait, size 11440, mode PIPE_TYPE_MESSAGE
  130   20034 [main] ssh (29820) fhandler_pipe::create: pipe read handle 0x10C
  150   20184 [main] ssh (29820) fhandler_pipe::create: CreateFile: name \\.\pipe\cygwin-e022582115c10879-29820-sigwait
  163   20347 [main] ssh (29820) fhandler_pipe::create: pipe write handle 0x110
  190   20537 [main] ssh (29820) dll_crt0_0: finished dll_crt0_0 initialization
--- Process 29820 loaded C:\Program Files (x86)\Citrix\ICA Client\epclient64.dll at 00007fff31030000
--- Process 29820 loaded C:\Windows\System32\user32.dll at 00007fff57d20000
--- Process 29820 loaded C:\Windows\System32\win32u.dll at 00007fff55a10000
--- Process 29820 loaded C:\Windows\System32\gdi32.dll at 00007fff57060000
--- Process 29820 loaded C:\Windows\System32\gdi32full.dll at 00007fff56990000
--- Process 29820 loaded C:\Windows\System32\msvcp_win.dll at 00007fff568d0000
--- Process 29820 loaded C:\Windows\System32\ucrtbase.dll at 00007fff55bf0000
--- Process 29820 loaded C:\Windows\System32\version.dll at 00007fff507c0000
--- Process 29820 loaded C:\Windows\System32\imm32.dll at 00007fff58800000
--- Process 29820 loaded C:\Windows\System32\ntmarta.dll at 00007fff54910000
--- Process 29820, exception c0000005 at 00000001801505d4
--- Process 29820 thread 27924 created
--- Process 29820, exception c0000005 at 0000000180062287
--- Process 29820 thread 27924 exited with status 0x0
--- Process 29820, exception c0000005 at 0000000180062287
--- Process 29820, exception c0000005 at 0000000180062287
--- Process 29820, exception c0000005 at 0000000180062287
.
.
.
--- Process 29820, exception c0000005 at 0000000180062287
--- Process 29820, exception c0000005 at 00007fff58a9e626
--- Process 29820 exited with status 0xc0000005
[1]    451 segmentation fault  strace ssh -vv me@myserver

Does anyone know what this means? Anyone with more experience know what could be happening here and how to fix?

windows
ssh
cygwin
asked on Super User Dec 15, 2020 by lampShadesDrifter

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