X2go unusable after upgrading to F33

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1

Hello,
after upgrading to F33 from F32 I can’t no longer use x2go to connect to my work machine (i’m on remote working!), or more precisely, I can connect but the connection lasts often few seconds, more rarely some minute.
I don’t know exactly what log files to check, but I’ve got this from /var/log/messages

Oct 29 17:24:30 mymachine audit[3922]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=6 pid=3922 comm="x2goagent" exe="/usr/bin/nxagent" sig=6 res=1
Oct 29 17:24:30 mymachine systemd[1]: Created slice system-systemd\x2dcoredump.slice.
Oct 29 17:24:30 mymachine audit: BPF prog-id=41 op=LOAD
Oct 29 17:24:30 mymachine audit: BPF prog-id=42 op=LOAD
Oct 29 17:24:30 mymachine audit: BPF prog-id=43 op=LOAD
Oct 29 17:24:30 mymachine systemd[1]: Started Process Core Dump (PID 4663/UID 0).
Oct 29 17:24:30 mymachine audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@0-4663-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Oct 29 17:24:30 mymachine audit[4664]: NETFILTER_CFG table=filter family=7 entries=0 op=register pid=4664 comm="(coredump)"
Oct 29 17:24:30 mymachine audit[4664]: NETFILTER_CFG table=broute family=7 entries=0 op=register pid=4664 comm="(coredump)"
Oct 29 17:24:30 mymachine audit[4664]: NETFILTER_CFG table=nat family=7 entries=0 op=register pid=4664 comm="(coredump)"
Oct 29 17:24:30 mymachine systemd[1295]: tmp-.mount_jetbrasPhNCY.mount: Succeeded.
Oct 29 17:24:30 mymachine systemd[1205]: tmp-.mount_jetbrasPhNCY.mount: Succeeded.
Oct 29 17:24:30 mymachine systemd[1]: tmp-.mount_jetbrasPhNCY.mount: Succeeded.
Oct 29 17:24:30 mymachine audit[3612]: USER_LOGIN pid=3612 uid=0 auid=1000 ses=6 msg='op=login id=1000 exe="/usr/sbin/sshd" hostname=? addr=172.91.1.18 terminal=ssh res=success'
Oct 29 17:24:30 mymachine audit[3612]: USER_START pid=3612 uid=0 auid=1000 ses=6 msg='op=login id=1000 exe="/usr/sbin/sshd" hostname=? addr=172.91.1.18 terminal=ssh res=success'
Oct 29 17:24:30 mymachine audit[3612]: CRYPTO_KEY_USER pid=3612 uid=0 auid=1000 ses=6 msg='op=destroy kind=server fp=SHA256:18:b5:be:f0:13:8d:c3:94:cd:d3:08:84:82:c7:ea:e3:ba:49:e1:87:c5:b1:41:27:7a:3c:ac:32:de:f7:26:c2 direction=? spid=4701 suid=1000  exe="/usr/sbin/sshd" hostname=? addr=? terminal=? res=success'
Oct 29 17:24:30 mymachine systemd-coredump[4664]: Process 3922 (x2goagent) of user 1000 dumped core.#012#012Stack trace of thread 3922:#012#0  0x00007f6ceda5fbc5 raise (libc.so.6 + 0x3dbc5)#012#1  0x00007f6ceda488a4 abort (libc.so.6 + 0x268a4)#012#2  0x00007f6cedaa2127 __libc_message (libc.so.6 + 0x80127)#012#3  0x00007f6cedb3347a __fortify_fail (libc.so.6 + 0x11147a)#012#4  0x00007f6cedb33446 __stack_chk_fail (libc.so.6 + 0x111446)#012#5  0x0000557b343be3b1 nxagentCollectPropertyEvent (nxagent + 0xbc3b1)#012#6  0x0000557b343a1b43 nxagentDispatchEvents (nxagent + 0x9fb43)#012#7  0x0000557b343a878a nxagentWakeupHandler (nxagent + 0xa678a)#012#8  0x0000557b3438d153 WaitForSomething (nxagent + 0x8b153)#012#9  0x0000557b34365cca Dispatch (nxagent + 0x63cca)#012#10 0x0000557b3434462e main (nxagent + 0x4262e)#012#11 0x00007f6ceda4a1a2 __libc_start_main (libc.so.6 + 0x281a2)#012#12 0x0000557b34346a1e _start (nxagent + 0x44a1e)
Oct 29 17:24:30 mymachine systemd[1]: systemd-coredump@0-4663-0.service: Succeeded.
Oct 29 17:24:30 mymachine audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-coredump@0-4663-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Oct 29 17:24:30 mymachine audit[178]: NETFILTER_CFG table=nat family=7 entries=0 op=unregister pid=178 comm="kworker/u24:5"
Oct 29 17:24:30 mymachine audit[178]: NETFILTER_CFG table=broute family=7 entries=0 op=unregister pid=178 comm="kworker/u24:5"
Oct 29 17:24:30 mymachine audit[178]: NETFILTER_CFG table=filter family=7 entries=0 op=unregister pid=178 comm="kworker/u24:5"
Oct 29 17:24:30 mymachine audit: BPF prog-id=43 op=UNLOAD
Oct 29 17:24:30 mymachine audit: BPF prog-id=42 op=UNLOAD
Oct 29 17:24:30 mymachine audit: BPF prog-id=41 op=UNLOAD
Oct 29 17:24:30 mymachine audit[3612]: USER_END pid=3612 uid=0 auid=1000 ses=6 msg='op=login id=1000 exe="/usr/sbin/sshd" hostname=? addr=172.91.1.18 terminal=ssh res=success'
Oct 29 17:24:30 mymachine audit[3612]: USER_LOGOUT pid=3612 uid=0 auid=1000 ses=6 msg='op=login id=1000 exe="/usr/sbin/sshd" hostname=? addr=172.91.1.18 terminal=ssh res=success'
Oct 29 17:24:30 mymachine audit[3612]: CRYPTO_KEY_USER pid=3612 uid=0 auid=1000 ses=6 msg='op=destroy kind=session fp=? direction=both spid=3614 suid=1000 rport=58583 laddr=172.89.20.41 lport=22  exe="/usr/sbin/sshd" hostname=? addr=172.91.1.18 terminal=? res=success'
Oct 29 17:24:30 mymachine audit[3612]: CRYPTO_KEY_USER pid=3612 uid=0 auid=1000 ses=6 msg='op=destroy kind=server fp=SHA256:18:b5:be:f0:13:8d:c3:94:cd:d3:08:84:82:c7:ea:e3:ba:49:e1:87:c5:b1:41:27:7a:3c:ac:32:de:f7:26:c2 direction=? spid=3614 suid=1000  exe="/usr/sbin/sshd" hostname=? addr=? terminal=? res=success'
Oct 29 17:24:30 mymachine audit[3612]: USER_END pid=3612 uid=0 auid=1000 ses=6 msg='op=PAM:session_close grantors=pam_selinux,pam_loginuid,pam_selinux,pam_namespace,pam_keyinit,pam_keyinit,pam_limits,pam_systemd,pam_unix,pam_umask,pam_lastlog acct="myuser" exe="/usr/sbin/sshd" hostname=172.91.1.18 addr=172.91.1.18 terminal=ssh res=success'
Oct 29 17:24:30 mymachine audit[3612]: CRED_DISP pid=3612 uid=0 auid=1000 ses=6 msg='op=PAM:setcred grantors=pam_env,pam_localuser,pam_unix acct="myuser" exe="/usr/sbin/sshd" hostname=172.91.1.18 addr=172.91.1.18 terminal=ssh res=success'
Oct 29 17:24:30 mymachine audit[3612]: CRYPTO_KEY_USER pid=3612 uid=0 auid=1000 ses=6 msg='op=destroy kind=server fp=SHA256:18:b5:be:f0:13:8d:c3:94:cd:d3:08:84:82:c7:ea:e3:ba:49:e1:87:c5:b1:41:27:7a:3c:ac:32:de:f7:26:c2 direction=? spid=3612 suid=0  exe="/usr/sbin/sshd" hostname=? addr=? terminal=? res=success'
Oct 29 17:24:30 mymachine systemd-logind[1054]: Session 6 logged out. Waiting for processes to exit.
Oct 29 17:24:31 mymachine abrt-server[4802]: Deleting problem directory ccpp-2020-10-29-17:24:30.954676-3922 (dup of ccpp-2020-10-29-08:42:22.92866-141434)
Oct 29 17:24:31 mymachine systemd[1]: Created slice system-dbus\x2d:1.4\x2dorg.freedesktop.problems.slice.
Oct 29 17:24:31 mymachine systemd[1]: Started dbus-:1.4-org.freedesktop.problems@0.service.
Oct 29 17:24:31 mymachine audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=dbus-:1.4-org.freedesktop.problems@0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Oct 29 17:24:31 mymachine abrt-notification[4858]: Process 141434 (nxagent) crashed in __fortify_fail()

can you help me?
I switched back to xpra to keep working but it’s awfully slow compared to x2go.
Thanks in advance!

2

Well, not sure what is x2go, but F33 has crypto policies updated to be more secure, breaking a lot of crypto stuff around there.
You could try to play with crypto policy settings to check if it’s related.
https://fedoraproject.org/wiki/Changes/StrongCryptoSettings2

2 Likes
3

Hello.

I ran into the same issue, see at:

https://www.mail-archive.com/x2go-dev@lists.x2go.org/msg06279.html
https://bodhi.fedoraproject.org/updates/?packages=nx-libs

What solved my problem, on the server:

dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-a10d47bd5b

HTH,

Regards.

2 Likes
4

Thanks @ziprasidone146939277, update has gone stable so a simple dnf upgrade --refresh should make everyone happy :slight_smile:
(btw: I did that bug submission :wink:)
g

3 Likes
5

that caused other issues for me but not a problem for x2go, the problem persisted after rolling back crypto policies to the f32 ones.
anyway, new x2go rpms are stable now and the problem has been solved.

6

Thanks! I have X2go installed too but had not used it recently so I didn’t encounter the problem. I just noticed x2go packages in today’s system update and saw this thread. Tested it and seems to be working fine.

Aside, one issue I still have with X2go is that some keys/characters don’t show up or are incorrect when typing from my Dell laptop, such as ?, /, and others. Something to do with key maps, but I’ve never managed to solve it.