The Samba 'panic action' script, /usr/share/samba/panic-action,
was called for PID 363150 (/usr/sbin/smbd).

This means there was a problem with the program, such as a segfault.
Below is a backtrace for this process generated with gdb, which shows
the state of the program at the time the error occurred.  The Samba log
files may contain additional information about the problem.

If the problem persists, you are encouraged to first install the
samba-dbgsym package, which contains the debugging symbols for the Samba
binaries.  Then submit the provided information as a bug report to
Ubuntu by visiting this link:
https://launchpad.net/ubuntu/+source/samba/+filebug

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f950c821dff in __GI___wait4 (pid=2230116, stat_loc=stat_loc@entry=0x7ffd2b130838, options=options@entry=0, usage=usage@entry=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:27
#0  0x00007f950c821dff in __GI___wait4 (pid=2230116, stat_loc=stat_loc@entry=0x7ffd2b130838, options=options@entry=0, usage=usage@entry=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:27
#1  0x00007f950c821d7b in __GI___waitpid (pid=<optimized out>, stat_loc=stat_loc@entry=0x7ffd2b130838, options=options@entry=0) at waitpid.c:38
#2  0x00007f950c7910e7 in do_system (line=<optimized out>) at ../sysdeps/posix/system.c:172
#3  0x00007f950cc61d3f in smb_panic_s3 () from /lib/x86_64-linux-gnu/libsmbconf.so.0
#4  0x00007f950d04009b in smb_panic () from /lib/x86_64-linux-gnu/libsamba-util.so.0
#5  0x00007f950d0402a5 in ?? () from /lib/x86_64-linux-gnu/libsamba-util.so.0
#6  <signal handler called>
#7  0x000055d687a3d260 in ?? ()
#8  0x00007f950bfcec7f in dbwrap_record_delete () from /usr/lib/x86_64-linux-gnu/samba/libdbwrap.so.0
#9  0x00007f950ce96924 in smbXsrv_session_logoff () from /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0
#10 0x00007f950ce96cd4 in ?? () from /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0
#11 0x00007f950c937c4a in tevent_common_invoke_immediate_handler () from /lib/x86_64-linux-gnu/libtevent.so.0
#12 0x00007f950c937c6e in tevent_common_loop_immediate () from /lib/x86_64-linux-gnu/libtevent.so.0
#13 0x00007f950c93dab0 in ?? () from /lib/x86_64-linux-gnu/libtevent.so.0
#14 0x00007f950c93be3b in ?? () from /lib/x86_64-linux-gnu/libtevent.so.0
#15 0x00007f950c936ec8 in _tevent_loop_once () from /lib/x86_64-linux-gnu/libtevent.so.0
#16 0x00007f950c93716b in tevent_common_loop_wait () from /lib/x86_64-linux-gnu/libtevent.so.0
#17 0x00007f950c93bdcb in ?? () from /lib/x86_64-linux-gnu/libtevent.so.0
#18 0x00007f950ce683a8 in smbd_process () from /usr/lib/x86_64-linux-gnu/samba/libsmbd-base.so.0
#19 0x000055d6861768bd in smbd_accept_connection (ev=0x55d687a14b90, fde=<optimized out>, flags=<optimized out>, private_data=<optimized out>) at ../../source3/smbd/server.c:1014
#20 0x00007f950c937801 in tevent_common_invoke_fd_handler () from /lib/x86_64-linux-gnu/libtevent.so.0
#21 0x00007f950c93dcd7 in ?? () from /lib/x86_64-linux-gnu/libtevent.so.0
#22 0x00007f950c93be3b in ?? () from /lib/x86_64-linux-gnu/libtevent.so.0
#23 0x00007f950c936ec8 in _tevent_loop_once () from /lib/x86_64-linux-gnu/libtevent.so.0
#24 0x00007f950c93716b in tevent_common_loop_wait () from /lib/x86_64-linux-gnu/libtevent.so.0
#25 0x00007f950c93bdcb in ?? () from /lib/x86_64-linux-gnu/libtevent.so.0
#26 0x000055d686173bc7 in smbd_parent_loop (parent=0x55d687a265b0, ev_ctx=0x55d687a14b90) at ../../source3/smbd/server.c:1361
#27 main (argc=<optimized out>, argv=<optimized out>) at ../../source3/smbd/server.c:2214
A debugging session is active.

        Inferior 1 [process 363150] will be detached.

Quit anyway? (y or n) [answered Y; input not from terminal]
[Inferior 1 (process 363150) detached]