[X2Go-Dev] git20190114.1758: Program terminated with signal SIGFPE, Arithmetic exception error reading variable: Division by zero

Robert Kudyba rkudyba at fordham.edu
Fri Feb 15 16:27:16 CET 2019 

This just started happening. Using X2Go with MATE. NIS users are impacted,
local users can still login.

x2goserver-4.1.0.4-0.0x2go1.0.git20190114.1758.heuler.fc29.x86_64
nx-libs-3.5.99.18-0.0build1.0.git20190208.3237.heuler.fc29.x86_64

from /var/log/message:

Feb 15 09:19:17 ourserver /usr/bin/x2gostartagent[591]: successfully
started X2Go Agent session with ID agw-57-1550240355_stDMATE_dp32
Feb 15 09:19:18 ourserver /usr/bin/x2goruncommand[1114]: launching session
with Xsession-x2go mechanism, using STARTUP="mate-session"
Feb 15 09:19:18 ourserver /usr/bin/x2goruncommand[1116]: dbus wrapper
available as /usr/bin/dbus-run-session
Feb 15 09:19:21 ourserver gnome-keyring-daemon[1362]: couldn't access
control socket: /run/user/1201/keyring/control: No such file or directory
Feb 15 09:19:21 ourserver mate-session[1126]: WARNING: keycode1 not existent
Feb 15 09:19:21 ourserver mate-session[1126]: WARNING: keycode2 not existent
Feb 15 09:19:21 ourserver systemd[1653]: Starting Sound Service...
Feb 15 09:19:21 ourserver mate-session[1126]: WARNING: Could not launch
application 'dropbox.desktop': Unable to start application: Failed to
execute child process <E2><80><9C>dropbox<E2><80><9D> (No such file or
directory)
Feb 15 09:19:21 ourserver gnome-keyring-daemon[1362]: The SSH agent was
already initialized
Feb 15 09:19:21 ourserver gnome-keyring-daemon[1362]: The PKCS#11 component
was already initialized
Feb 15 09:19:22 ourserver gnome-keyring-daemon[1362]: The Secret Service
was already initialized
Feb 15 09:19:22 ourserver spice-vdagent[1504]: Cannot access vdagent virtio
channel /dev/virtio-ports/com.redhat.spice.0
Feb 15 09:19:22 ourserver dbus-daemon[842]: [system] Rejected send message,
2 matched rules; type="method_call", sender=":1.349276" (uid=1201 pid=1415
comm="/usr/bin/pulseaudio --daemonize=no ")
interface="org.freedesktop.DBus.ObjectManager" member="GetManagedObjects"
error name="(unset)" requested_reply="0" destination="org.bluez" (bus)
Feb 15 09:19:22 ourserver dbus-daemon[842]: [system] Activating service
name='org.freedesktop.problems' requested by ':1.349262' (uid=1201 pid=1490
comm="abrt-applet --gapplication-service ") (using servicehelper)
Feb 15 09:19:22 ourserver systemd[1653]: Started Sound Service.
Feb 15 09:19:22 ourserver pulseaudio[1415]: E: [pulseaudio] bluez5-util.c:
GetManagedObjects() failed: org.freedesktop.DBus.Error.AccessDenied:
Rejected send message, 2 matched rules; type="method_call",
sender=":1.349276" (uid=1201 pid=1415 comm="/usr/bin/pulseaudio
--daemonize=no ") interface="org.freedesktop.DBus.ObjectManager"
member="GetManagedObjects" error name="(unset)" requested_reply="0"
destination="org.bluez" (bus)
Feb 15 09:19:24 ourserver kernel: traps: x2goagent[576] trap divide error
ip:55fdd31839fc sp:7fff211e8100 error:0 in nxagent[55fdd3095000+318000]
Feb 15 09:19:25 ourserver systemd[1]: Started Process Core Dump (PID
1650/UID 0).
Feb 15 09:19:25 ourserver pulseaudio[1415]: XIO:  fatal IO error 11
(Resource temporarily unavailable) on X server ":57"
Feb 15 09:19:25 ourserver pulseaudio[1415]:      after 18 requests (18
known processed) with 0 events remaining.
Feb 15 09:19:25 ourserver systemd[1653]: pulseaudio.service: Main process
exited, code=exited, status=1/FAILURE
Feb 15 09:19:25 ourserver systemd[1653]: pulseaudio.service: Failed with
result 'exit-code'.
Feb 15 09:19:25 ourserver mate-session[1126]: WARNING: Detected that
screensaver has left the bus
Feb 15 09:19:26 ourserver systemd[1653]: pulseaudio.service: Service
RestartSec=100ms expired, scheduling restart.
Feb 15 09:19:26 ourserver systemd[1653]: pulseaudio.service: Scheduled
restart job, restart counter is at 1.
Feb 15 09:19:26 ourserver systemd[1653]: Stopped Sound Service.
Feb 15 09:19:26 ourserver systemd[1653]: Starting Sound Service...
Feb 15 09:19:28 ourserver pulseaudio[1686]: W: [pulseaudio] pid.c: Stale
PID file, overwriting.
Feb 15 09:19:28 ourserver dbus-daemon[842]: [system] Rejected send message,
2 matched rules; type="method_call", sender=":1.349363" (uid=1201 pid=1686
comm="/usr/bin/pulseaudio --daemonize=no ")
interface="org.freedesktop.DBus.ObjectManager" member="GetManagedObjects"
error name="(unset)" requested_reply="0" destination="org.bluez" (bus)
Feb 15 09:19:28 ourserver systemd-coredump[1651]: Process 576 (x2goagent)
of user 1201 dumped core.#012#012Stack trace of thread 576:#012#0
0x000055fdd31839fc n/a (nxagent)#012#1  0x000055fdd3183ad5 n/a
(nxagent)#012#2  0x000055fdd3179c66 n/a (nxagent)#012#3  0x000055fdd30b5cc8
n/a (nxagent)#012#4  0x000055fdd3099821 n/a (nxagent)#012#5
0x00007f634ffa3413 __libc_start_main (libc.so.6)#012#6  0x000055fdd3099b5e
n/a (nxagent)
Feb 15 09:19:29 ourserver pulseaudio[1686]: E: [pulseaudio] bluez5-util.c:
GetManagedObjects() failed: org.freedesktop.DBus.Error.AccessDenied:
Rejected send message, 2 matched rules; type="method_call",
sender=":1.349363" (uid=1201 pid=1686 comm="/usr/bin/pulseaudio
--daemonize=no ") interface="org.freedesktop.DBus.ObjectManager"
member="GetManagedObjects" error name="(unset)" requested_reply="0"
destination="org.bluez" (bus)

here's a backtrace:
Core was generated by: x2goagent -nolisten tcp -nolisten tcp -dpi 96 -D
-auth /path/to/.Xauthori'.
Program terminated with signal SIGFPE, Arithmetic exception.
#0  0x000055fdd31839fc in XkbAdjustGroup (group=<error reading variable:
Division by zero>, ctrls=ctrls at entry=0x55fdd440cd00) at xkbUtils.c:688
688     xkbUtils.c: No such file or directory.
(gdb) bt full
#0  0x000055fdd31839fc in XkbAdjustGroup (group=<error reading variable:
Division by zero>, ctrls=ctrls at entry=0x55fdd440cd00) at xkbUtils.c:688
        act = 0
#1  0x000055fdd3183ad5 in XkbComputeDerivedState (xkbi=0x55fdd4422100) at
xkbUtils.c:714
        state = 0x55fdd4422112
        ctrls = 0x55fdd440cd00
        grp = <optimized out>
#2  0x000055fdd3179c66 in ProcXkbLatchLockState (client=0x55fdd47b2930) at
xkb.c:560
        status = <optimized out>
        dev = 0x55fdd43d8870
        oldState = {group = 0 '\000', locked_group = 0 '\000', base_group =
0, latched_group = 0, mods = 0 '\000', base_mods = 0 '\000', latched_mods =
0 '\000', locked_mods = 0 '\000',
          compat_state = 0 '\000', grab_mods = 0 '\000', compat_grab_mods =
0 '\000', lookup_mods = 0 '\000', compat_lookup_mods = 0 '\000',
ptr_buttons = 0}
        newState = 0x55fdd4422112
        changed = <optimized out>
        stuff = <optimized out>
#3  0x000055fdd30b5cc8 in Dispatch () at NXdispatch.c:482
        clientReady = 0x55fdd44064a0
        result = <optimized out>
        client = 0x55fdd47b2930
        nready = <optimized out>
        icheck = 0x55fdd34e36d0 <checkForInput>
        start_tick = 0
        currentDispatch = <optimized out>
#4  0x000055fdd3099821 in main (argc=15, argv=0x7fff211e8358,
envp=<optimized out>) at main.c:353
        i = <optimized out>
        xauthfile = <optimized out>
        alwaysCheckForInput = {0, 1}
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