Description of problem:
I had 'Services' (systemadm) open in the background and while I was in a root terminal updating GRUB's menu (grub2-mkconfig etc.) systemadm crashed.

Version-Release number of selected component:
systemd-ui-1-3.fc18

Additional info:
backtrace_rating: 4
cmdline:        systemadm
crash_function: __lll_unlock_wake
executable:     /usr/bin/systemadm
kernel:         3.6.10-4.fc18.i686
uid:            1000
var_log_messages: Dec 14 10:30:43 fedora abrt[1552]: Saved core dump of pid 988 (/usr/bin/systemadm) to /var/spool/abrt/ccpp-2012-12-14-10:30:41-988 (45965312 bytes)

Truncated backtrace:
Thread no. 2 (10 frames)
 #1 __lll_unlock_wake at ../nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevellock.S:386
 #2 _L_unlock_665 at /lib/libpthread.so.0
 #3 __pthread_mutex_unlock_usercnt at pthread_mutex_unlock.c:52
 #4 __pthread_mutex_unlock at pthread_mutex_unlock.c:297
 #5 g_mutex_unlock at gthread-posix.c:229
 #6 g_source_attach at gmain.c:1093
 #7 g_simple_async_result_complete_in_idle at gsimpleasyncresult.c:817
 #8 send_message_with_reply_deliver at gdbusconnection.c:1826
 #9 send_message_data_deliver_reply_unlocked at gdbusconnection.c:1864
 #10 on_worker_message_received at gdbusconnection.c:2345