[root@mmaszyna ~]# coredumpctl dump 351
           PID: 351 (systemd-udevd)
           UID: 0 (root)
           GID: 0 (root)
        Signal: 4 (ILL)
     Timestamp: pią 2015-07-17 23:20:53 CEST (2 weeks 3 days ago)
  Command Line: /lib/systemd/systemd-udevd
    Executable: /lib/udev/udevd
 Control Group: /system.slice/systemd-udevd.service
          Unit: systemd-udevd.service
         Slice: system.slice
       Boot ID: 4693d5860c3c4dad88b957a9f28bd60a
    Machine ID: 8712b6fa9bbcb91a8fc8a7b9481c95ed
      Hostname: mmaszyna
       Message: Process 351 (systemd-udevd) of user 0 dumped core.

                Stack trace of thread 351:
                #0  0x00000000f764b226 __pthread_rwlock_rdlock (libpthread.so.0)
                #1  0x00000000f74c22b2 n/a (libc.so.6)
                #2  0x00000000f74c0fd2 __dcgettext (libc.so.6)
                #3  0x00000000f7512603 __strerror_r (libc.so.6)
                #4  0x00000000f7512522 strerror (libc.so.6)
                #5  0x00000000f768063e n/a (libkmod.so.2)
                #6  0x00000000f7682e77 kmod_module_probe_insert_module (libkmod.so.2)
                #7  0x0000000056639a31 n/a (udevd)
                #8  0x000000005663023c n/a (udevd)
                #9  0x000000005661d9f4 n/a (udevd)
                #10 0x000000005661f3bd n/a (udevd)
                #11 0x0000000056620a8e n/a (udevd)
                #12 0x000000005663da95 n/a (udevd)
                #13 0x000000005663f47f n/a (udevd)
                #14 0x000000005661b082 n/a (udevd)
                #15 0x00000000f74b368b __libc_start_main (libc.so.6)
                #16 0x000000005661c582 n/a (udevd)
Refusing to dump core to tty.