Version-Release number of selected component: systemd-219-9.fc22 Additional info: reporter: libreport-2.5.0 backtrace_rating: 4 cmdline: /usr/lib/systemd/systemd-logind crash_function: socket executable: /usr/lib/systemd/systemd-logind kernel: 4.0.0-0.rc4.git0.1.fc22.x86_64 runlevel: N 5 type: CCpp uid: 0 Truncated backtrace: Thread no. 1 (7 frames) #0 socket at ../sysdeps/unix/syscall-template.S:81 #1 sd_pid_notify_with_fds at ../src/libsystemd/sd-daemon/sd-daemon.c:383 #2 sd_notify.constprop.35 at ../src/libsystemd/sd-daemon/sd-daemon.c:469 #3 process_watchdog at ../src/libsystemd/sd-event/sd-event.c:2295 #4 sd_event_wait at ../src/libsystemd/sd-event/sd-event.c:2411 #5 sd_event_run at ../src/libsystemd/sd-event/sd-event.c:2499 #6 manager_run at ../src/login/logind.c:1119
Created attachment 1007829 [details] File: backtrace
Created attachment 1007830 [details] File: cgroup
Created attachment 1007831 [details] File: core_backtrace
Created attachment 1007832 [details] File: dso_list
Created attachment 1007833 [details] File: environ
Created attachment 1007834 [details] File: limits
Created attachment 1007835 [details] File: maps
Created attachment 1007836 [details] File: open_fds
Created attachment 1007837 [details] File: proc_pid_status
Created attachment 1007838 [details] File: var_log_messages
So, systemd-logind is trying to ping systemd with WATCHDOG=1, and systemd kills systemd-logind because it hasn't received watchdog ping in one minute. Seems most likely that something is gone wrong with the notification socket.
*** This bug has been marked as a duplicate of bug 1300212 ***