[X2Go-Dev] Windows nightly crashes

Wed May 20 17:08:41 CEST 2020

Hi Uli,

Try to debug the code using the debugger? Adding print lines is not the way to do it.

I hope somebody can say how to re-compile the code with debug symbols and if gdb is good enough?

Kind regards,
Melroy van den Berg

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
Op woensdag, mei 20, 2020 2:16 PM, Ulrich Sibiller <ulrich.sibiller at gmail.com> schreef:

> Running with --libssh-packetlog shows a bit more:
> [2020/05/20 14:08:36.287745, 2] ssh_socket_connect: Nonblocking
> connection socket: 2228
> [2020/05/20 14:08:36.287745, 2] ssh_connect: Socket connecting, now
> waiting for the callbacks to work
> [2020/05/20 14:08:36.288743, 3] ssh_connect: Actual timeout : 60000
> [2020/05/20 14:08:36.293743, 3] ssh_socket_pollcallback: Received
> POLLOUT in connecting state
> [2020/05/20 14:08:36.293743, 1] socket_callback_connected: Socket
> connection callback: 1 (0)
> [2020/05/20 14:08:36.295746, 3] ssh_socket_unbuffered_write: Enabling
> POLLOUT for socket
> [2020/05/20 14:08:36.309751, 3] callback_receive_banner: Received
> banner: SSH-2.0-OpenSSH_5.8
> [2020/05/20 14:08:36.312765, 2] ssh_client_connection_callback: SSH
> server banner: SSH-2.0-OpenSSH_5.8
> [2020/05/20 14:08:36.313757, 2] ssh_analyze_banner: Analyzing banner:
> SSH-2.0-OpenSSH_5.8
> [2020/05/20 14:08:36.314750, 2] ssh_analyze_banner: We are talking to
> an OpenSSH client version: 5.8 (50800)
> [2020/05/20 14:08:37.352741, 3] ssh_client_select_hostkeys: Order of
> wanted host keys:
> "ssh-ed25519,ecdsa-sha2-nistp521,ecdsa-sha2-nistp384,ecdsa-sha2-nistp256,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ssh-dss"
> [2020/05/20 14:08:37.353749, 1] ssh_known_hosts_read_entries: Failed
> to open the known_hosts file '/etc/ssh/ssh_known_hosts': No such file
> or directory
> [2020/05/20 14:08:37.354752, 3] ssh_client_select_hostkeys:
> Algorithms found in known_hosts files: "ecdsa-sha2-nistp256"
> [2020/05/20 14:08:37.355743, 3] ssh_client_select_hostkeys: Changing
> host key method to
> "ecdsa-sha2-nistp256,ssh-ed25519,ecdsa-sha2-nistp521,ecdsa-sha2-nistp384,rsa-sha2-512,rsa-sha2-256,ssh-rsa,ssh-dss"
> [2020/05/20 14:08:37.355743, 3] ssh_socket_unbuffered_write: Enabling
> POLLOUT for socket
> [2020/05/20 14:08:37.356742, 3] packet_send2: packet: wrote [type=20,
> len=940, padding_size=4, comp=935, payload=935]
> [2020/05/20 14:08:37.356742, 3] ssh_send_kex: SSH_MSG_KEXINIT sent
> [2020/05/20 14:08:37.357742, 3] ssh_packet_socket_callback: packet:
> read type 20 [len=852,padding=5,comp=846,payload=846]
> [2020/05/20 14:08:37.357742, 3] ssh_packet_process: Dispatching
> handler for packet type 20
> [2020/05/20 14:08:37.357742, 2] ssh_kex_select_methods: Negotiated
> ecdh-sha2-nistp256,ecdsa-sha2-nistp256,aes256-ctr,aes256-ctr,hmac-sha1,hmac-sha1,none,none,,
> [2020/05/20 14:08:37.359741, 3] packet_send2: packet: wrote [type=30,
> len=76, padding_size=5, comp=70, payload=70]
> [2020/05/20 14:08:37.360741, 3] ssh_socket_unbuffered_write: Enabling
> POLLOUT for socket
> [2020/05/20 14:08:37.371817, 3] ssh_packet_socket_callback: packet:
> read type 31 [len=292,padding=8,comp=283,payload=283]
> [2020/05/20 14:08:37.371817, 3] ssh_packet_process: Dispatching
> handler for packet type 31
> [2020/05/20 14:08:37.374742, 3] ssh_socket_unbuffered_write: Enabling
> POLLOUT for socket
> [2020/05/20 14:08:37.374742, 3] packet_send2: packet: wrote [type=21,
> len=12, padding_size=10, comp=1, payload=1]
> [2020/05/20 14:08:37.376744, 3] crypt_set_algorithms2: Set output
> algorithm to aes256-ctr
> [2020/05/20 14:08:37.376744, 3] crypt_set_algorithms2: Set HMAC
> output algorithm to hmac-sha1
> [2020/05/20 14:08:37.377744, 3] crypt_set_algorithms2: Set input
> algorithm to aes256-ctr
> [2020/05/20 14:08:37.377744, 3] crypt_set_algorithms2: Set HMAC input
> algorithm to hmac-sha1
> [2020/05/20 14:08:37.378742, 2] ssh_init_rekey_state: Set rekey after
> 4294967296 blocks
> [2020/05/20 14:08:37.378742, 2] ssh_init_rekey_state: Set rekey after
> 4294967296 blocks
> [2020/05/20 14:08:37.378742, 2] ssh_packet_client_ecdh_reply:
> SSH_MSG_NEWKEYS sent
> [2020/05/20 14:08:37.379742, 3] ssh_packet_socket_callback:
> Processing 16 bytes left in socket buffer
> [2020/05/20 14:08:37.379742, 3] ssh_packet_socket_callback: packet:
> read type 21 [len=12,padding=10,comp=1,payload=1]
> [2020/05/20 14:08:37.379742, 3] ssh_packet_process: Dispatching
> handler for packet type 21
> [2020/05/20 14:08:37.380742, 2] ssh_packet_newkeys: Received SSH_MSG_NEWKEYS
> [2020/05/20 14:08:37.382742, 2] ssh_packet_newkeys: Signature
> verified and valid
> [2020/05/20 14:08:37.382742, 3] ssh_connect: current state : 7
> x2go-DEBUG-../src/sshmasterconnection.cpp:869> Session port before
> config file parse (part 2): 22
> x2go-DEBUG-../src/sshmasterconnection.cpp:879> Session port after
> config file parse (part 2): 22
> x2go-DEBUG-../src/sshmasterconnection.cpp:903> cserverAuth
> x2go-DEBUG-../src/sshmasterconnection.cpp:942> state: 1
>
> x2go-DEBUG-../src/sshmasterconnection.cpp:674> Setting SSH directory
> to C:/Users/XXX/ssh
>
> On Wed, May 20, 2020 at 1:52 PM Ulrich Sibiller
> ulrich.sibiller at gmail.com wrote:
>
> > Running with --libssh-debug does not provide any further hint:
> > x2go-DEBUG-../src/sshmasterconnection.cpp:805> Session port after
> > config file parse: 22
> > [2020/05/20 13:49:23.492000, 2] ssh_connect: libssh 0.9.3 (c)
> > 2003-2019 Aris Adamantiadis, Andreas Schneider and libssh
> > contributors. Distributed under the LGPL, please refer to COPYING file
> > for information about your rights, using threading threads_pthread
> > [2020/05/20 13:49:23.502982, 2] ssh_socket_connect: Nonblocking
> > connection socket: 2192
> > [2020/05/20 13:49:23.503982, 2] ssh_connect: Socket connecting, now
> > waiting for the callbacks to work
> > [2020/05/20 13:49:23.508040, 1] socket_callback_connected: Socket
> > connection callback: 1 (0)
> > [2020/05/20 13:49:23.523984, 2] ssh_client_connection_callback: SSH
> > server banner: SSH-2.0-OpenSSH_5.8
> > [2020/05/20 13:49:23.523984, 2] ssh_analyze_banner: Analyzing banner:
> > SSH-2.0-OpenSSH_5.8
> > [2020/05/20 13:49:23.524982, 2] ssh_analyze_banner: We are talking to
> > an OpenSSH client version: 5.8 (50800)
> > [2020/05/20 13:49:24.665982, 1] ssh_known_hosts_read_entries: Failed
> > to open the known_hosts file '/etc/ssh/ssh_known_hosts': No such file
> > or directory
> > [2020/05/20 13:49:24.666982, 2] ssh_kex_select_methods: Negotiated
> > ecdh-sha2-nistp256,ecdsa-sha2-nistp256,aes256-ctr,aes256-ctr,hmac-sha1,hmac-sha1,none,none,,
> > [2020/05/20 13:49:24.684982, 2] ssh_init_rekey_state: Set rekey after
> > 4294967296 blocks
> > [2020/05/20 13:49:24.686022, 2] ssh_init_rekey_state: Set rekey after
> > 4294967296 blocks
> > [2020/05/20 13:49:24.687983, 2] ssh_packet_client_ecdh_reply:
> > SSH_MSG_NEWKEYS sent
> > [2020/05/20 13:49:24.687983, 2] ssh_packet_newkeys: Received SSH_MSG_NEWKEYS
> > -> then it crashes
> > On Wed, May 20, 2020 at 12:36 PM Ulrich Sibiller
> > ulrich.sibiller at gmail.com wrote:
> >
> > > Here's the output of the centos7 nightly build
> > > x2goclient-4.1.2.3-0.0x2go1.0.git20200520.1947.heuler.el7.x86_64 which
> > > is working with the same session setup:
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:795> Session port before
> > > config file parse: 22
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:805> Session port after
> > > config file parse: 22
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:869> Session port before
> > > config file parse (part 2): 22
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:879> Session port after
> > > config file parse (part 2): 22
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:903> cserverAuth
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:942> state: 1
> > > ---> Windows version stopped here
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:1206> Challenge
> > > authentication requested.
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:1084> Have prompts: 1
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:1088> Prompt[0]: |Password: |
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:1092> Password request
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:1084> Have prompts: 0
> > > x2go-DEBUG-../src/sshmasterconnection.cpp:1170> Challenge authentication OK.
> > > On Wed, May 20, 2020 at 12:12 PM Ulrich Sibiller
> > > ulrich.sibiller at gmail.com wrote:
> > >
> > > > Hi,
> > > > both x2goclient for windows 4.1.2.2-20200213 and
> > > > https://code.x2go.org/releases/binary-win32/x2goclient/heuler/mingw32-4.8/qt-4.8/x2goclient-4.1.2.3-2020.05.20-a1a2f62-setup.exe
> > > > are crashing during connection establishment when using a proxy
> > > > (output from the debug build):
> > > > x2go-DEBUG-../src/onmainwindow.cpp:2931> Starting new ssh connection
> > > > to server:"!myremotehost":"22" krbLogin: false
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:168> SshMasterConnection,
> > > > host "!myremotehost"; port 22; user "yyy"; useproxy true; proxyserver
> > > > "!10.11.12.13"; proxyport 22
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:495> proxyserver:
> > > > "!10.11.12.13"; proxyport: 22; proxylogin: "remoteuser"
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:168> SshMasterConnection,
> > > > host "!10.11.12.13"; port 22; user "remoteuser"; useproxy false;
> > > > proxyserver ""; proxyport 0
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:248> Starting SSH connection
> > > > without Kerberos authentication.
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:250> SshMasterConnection,
> > > > instance SshMasterConnection(0x3917608) created.
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:492> SshMasterConnection,
> > > > instance SshMasterConnection(0x3917608) entering thread.
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:573> Setting SSH directory
> > > > to C:/Users/LOCALUSER/ssh
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:795> Session port before
> > > > config file parse: 22
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:805> Session port after
> > > > config file parse: 22
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:869> Session port before
> > > > config file parse (part 2): 22
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:879> Session port after
> > > > config file parse (part 2): 22
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:903> cserverAuth
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:942> state: 1
> > > > x2go-DEBUG-../src/sshmasterconnection.cpp:674> Setting SSH directory
> > > > to C:/Users/LOCALUSER/ssh
> > > > and then x2go completely vanishes.
> > > > Any ideas how to debug this further?
> > > > Uli
>
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