[2018/01/16 15:00:18.598115,  0] ../lib/util/fault.c:78(fault_report)
  ===============================================================
[2018/01/16 15:00:18.598220,  0] ../lib/util/fault.c:79(fault_report)
  INTERNAL ERROR: Signal 11 in pid 23414 (4.3.11-Ubuntu)
  Please read the Trouble-Shooting section of the Samba HOWTO
[2018/01/16 15:00:18.598258,  0] ../lib/util/fault.c:81(fault_report)
  ===============================================================
[2018/01/16 15:00:18.598287,  0] ../source3/lib/util.c:789(smb_panic_s3)
  PANIC (pid 23414): internal error
[2018/01/16 15:00:18.600000,  0] ../source3/lib/util.c:900(log_stack_trace)
  BACKTRACE: 5 stack frames:
   #0 /usr/lib/x86_64-linux-gnu/samba/libsmbregistry.so.0(log_stack_trace+0x1a) [0x7f98f762f7aa]
   #1 /usr/lib/x86_64-linux-gnu/samba/libsmbregistry.so.0(smb_panic_s3+0x20) [0x7f98f762f880]
   #2 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2f) [0x7f98f83a2f1f]
   #3 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(+0x1b136) [0x7f98f83a3136]
   #4 /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390) [0x7f98f8601390]
[2018/01/16 15:00:18.600480,  0] ../source3/lib/util.c:801(smb_panic_s3)
  smb_panic(): calling panic action [/usr/share/samba/panic-action 23414]
[2018/01/16 15:00:18.615377,  0] ../source3/lib/util.c:809(smb_panic_s3)
  smb_panic(): action returned status 0
[2018/01/16 15:00:18.615477,  0] ../source3/lib/dumpcore.c:303(dump_core)
  dumping core in /var/log/samba/cores/smbd
[2018/01/16 15:00:19.640051,  0] ../lib/util/become_daemon.c:124(daemon_ready)
  STATUS=daemon 'smbd' finished starting up and ready to serve connections
[2018/01/16 15:00:19.657278,  0] ../lib/util/fault.c:78(fault_report)
  ===============================================================
[2018/01/16 15:00:19.657419,  0] ../lib/util/fault.c:79(fault_report)
  INTERNAL ERROR: Signal 11 in pid 23497 (4.3.11-Ubuntu)
  Please read the Trouble-Shooting section of the Samba HOWTO
[2018/01/16 15:00:19.657480,  0] ../lib/util/fault.c:81(fault_report)
  ===============================================================
[2018/01/16 15:00:19.657520,  0] ../source3/lib/util.c:789(smb_panic_s3)
  PANIC (pid 23497): internal error
[2018/01/16 15:00:19.660118,  0] ../source3/lib/util.c:900(log_stack_trace)
  BACKTRACE: 15 stack frames:
   #0 /usr/lib/x86_64-linux-gnu/samba/libsmbregistry.so.0(log_stack_trace+0x1a) [0x7f98f762f7aa]
   #1 /usr/lib/x86_64-linux-gnu/samba/libsmbregistry.so.0(smb_panic_s3+0x20) [0x7f98f762f880]
   #2 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2f) [0x7f98f83a2f1f]
   #3 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(+0x1b136) [0x7f98f83a3136]
   #4 /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390) [0x7f98f8601390]
   #5 /usr/lib/x86_64-linux-gnu/libtalloc.so.2(talloc_get_size+0x5) [0x7f98f511c5c5]
   #6 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(event_add_to_poll_args+0x76) [0x7f98f62c2556]
   #7 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(+0x2cb11) [0x7f98f62c2b11]
   #8 /usr/lib/x86_64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x9d) [0x7f98f4f0c92d]
   #9 /usr/lib/x86_64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x1b) [0x7f98f4f0cb5b]
   #10 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(start_background_queue+0x290) [0x7f98f7ee5180]
   #11 /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0(printing_subsystem_init+0x85) [0x7f98f7ee5475]
   #12 /usr/sbin/smbd(main+0x13e7) [0x55c7aac6fbe7]
   #13 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f98f4b5e830]
   #14 /usr/sbin/smbd(_start+0x29) [0x55c7aac70199]
[2018/01/16 15:00:19.660365,  0] ../source3/lib/util.c:801(smb_panic_s3)
  smb_panic(): calling panic action [/usr/share/samba/panic-action 23497]
[2018/01/16 15:00:19.675587,  0] ../source3/lib/util.c:809(smb_panic_s3)
  smb_panic(): action returned status 0
[2018/01/16 15:00:19.675719,  0] ../source3/lib/dumpcore.c:303(dump_core)
  dumping core in /var/log/samba/cores/smbd
[2018/01/16 15:00:20.252457,  0] ../lib/util/fault.c:78(fault_report)
  ===============================================================
[2018/01/16 15:00:20.252541,  0] ../lib/util/fault.c:79(fault_report)
  INTERNAL ERROR: Signal 11 in pid 23411 (4.3.11-Ubuntu)
  Please read the Trouble-Shooting section of the Samba HOWTO
[2018/01/16 15:00:20.252620,  0] ../lib/util/fault.c:81(fault_report)
  ===============================================================
[2018/01/16 15:00:20.252661,  0] ../source3/lib/util.c:789(smb_panic_s3)
  PANIC (pid 23411): internal error
[2018/01/16 15:00:20.253777,  0] ../source3/lib/util.c:900(log_stack_trace)
  BACKTRACE: 13 stack frames:
   #0 /usr/lib/x86_64-linux-gnu/samba/libsmbregistry.so.0(log_stack_trace+0x1a) [0x7f98f762f7aa]
   #1 /usr/lib/x86_64-linux-gnu/samba/libsmbregistry.so.0(smb_panic_s3+0x20) [0x7f98f762f880]
   #2 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(smb_panic+0x2f) [0x7f98f83a2f1f]
   #3 /usr/lib/x86_64-linux-gnu/libsamba-util.so.0(+0x1b136) [0x7f98f83a3136]
   #4 /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390) [0x7f98f8601390]
   #5 /usr/lib/x86_64-linux-gnu/libtalloc.so.2(talloc_get_size+0x5) [0x7f98f511c5c5]
   #6 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(event_add_to_poll_args+0x76) [0x7f98f62c2556]
   #7 /usr/lib/x86_64-linux-gnu/libsmbconf.so.0(+0x2cb11) [0x7f98f62c2b11]
   #8 /usr/lib/x86_64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x9d) [0x7f98f4f0c92d]
   #9 /usr/lib/x86_64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x1b) [0x7f98f4f0cb5b]
   #10 /usr/sbin/smbd(main+0x1899) [0x55c7aac70099]
   #11 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7f98f4b5e830]
   #12 /usr/sbin/smbd(_start+0x29) [0x55c7aac70199]
[2018/01/16 15:00:20.254025,  0] ../source3/lib/util.c:801(smb_panic_s3)
  smb_panic(): calling panic action [/usr/share/samba/panic-action 23411]
[2018/01/16 15:00:20.443607,  0] ../source3/lib/util.c:809(smb_panic_s3)
  smb_panic(): action returned status 0
[2018/01/16 15:00:20.443760,  0] ../source3/lib/dumpcore.c:303(dump_core)
  dumping core in /var/log/samba/cores/smbd