From the crash I got this: --- stack trace --- #0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 set = {__val = {7296, 0, 0, 0, 0, 0, 0, 94365769603472, 139709768157872, 335544320, 139709772814480, 32, 94365769603572, 94365769603472, 94365769603572, 0}} pid = tid = ret = #1 0x00007f10b3933801 in __GI_abort () at abort.c:79 save_stage = 1 act = {__sigaction_handler = {sa_handler = 0x55d33e2d19f4, sa_sigaction = 0x55d33e2d19f4}, sa_mask = {__val = {94365769603472, 94365769603572, 0, 0, 0, 0, 0, 17179869184, 0, 17179869184, 0, 0, 13067206327954895872, 18446744073709551615, 140729233965056, 139709772814480}}, sa_flags = -1228636032, sa_restorer = 0xfffe} sigs = {__val = {32, 0 }} __cnt = __set = __cnt = __set = #2 0x00007f10b50ceca2 in dump_core () at ../source3/lib/dumpcore.c:338 called = true __FUNCTION__ = "dump_core" #3 0x00007f10b50bbb6b in smb_panic_s3 (why=) at ../source3/lib/util.c:838 cmd = result = __FUNCTION__ = "smb_panic_s3" #4 0x00007f10b71a48cf in smb_panic (why=why@entry=0x7f10b71f2d37 "internal error") at ../lib/util/fault.c:166 No locals. #5 0x00007f10b71a4ae6 in fault_report (sig=) at ../lib/util/fault.c:83 counter = 1 #6 sig_fault (sig=) at ../lib/util/fault.c:94 No locals. #7 No locals. #8 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 No locals. #9 0x00007f10b719d4fe in push_ucs2_talloc (ctx=ctx@entry=0x0, dest=dest@entry=0x7ffe76d586a8, src=src@entry=0x0, converted_size=converted_size@entry=0x7ffe76d586a0) at ../lib/util/charset/pull_push.c:41 src_len = #10 0x00007f10b5bbd2d0 in E_md4hash (passwd=0x0, p16=p16@entry=0x7ffe76d58a70 "") at ../libcli/auth/smbencrypt.c:78 len = 989742900 wpwd = 0x7ffe76d58a70 ret = #11 0x00007f10b6d9686a in create_volume_objectid (conn=conn@entry=0x55d33e2cd660, objid=objid@entry=0x7ffe76d58a70 "") at ../source3/smbd/trans2.c:3377 No locals. #12 0x00007f10b6d97503 in smbd_do_qfsinfo (xconn=0x55d33e2ba280, conn=conn@entry=0x55d33e2cd660, mem_ctx=, info_level=info_level@entry=1008, flags2=flags2@entry=8, max_data_bytes=max_data_bytes@entry=64, fixed_portion=0x7ffe76d58ba0, fname=0x55d33e2d2840, ppdata=0x7ffe76d58b90, ret_data_len=0x7ffe76d58b88) at ../source3/smbd/trans2.c:3806 objid = '\000' extended_info = {samba_magic = 0, samba_version = 0, samba_subversion = 0, samba_gitcommitdate = 0, samba_version_string = "\376\025\020\261\020\177\000\000\320\300߶\020\177\000\000\004\000\000\000\000\000\000\000\220\365,>"} pdata = end_data = 0x55d33e2e0baf "" data_len = 0 len = 0 vname = 0x7f10b50edddc "" snum = fstype = 0x55d33e28fee0 "NTFS" filename = bytes_per_sector = 512 additional_flags = 0 smb_fname = {base_name = 0x55d33e2d2960 "shakeass.mp3", stream_name = 0x0, original_lcomp = 0x0, flags = 0, st = {st_ex_dev = 2082, st_ex_ino = 107, st_ex_mode = 33279, st_ex_nlink = 1, st_ex_uid = 0, st_ex_gid = 0, st_ex_rdev = 0, st_ex_size = 213993, st_ex_atime = {tv_sec = 1550245406, tv_nsec = 51838600}, st_ex_mtime = {tv_sec = 1550245370, tv_nsec = 989742900}, st_ex_ctime = {tv_sec = 1550245406, tv_nsec = 110179900}, st_ex_btime = {tv_sec = 1550245370, tv_nsec = 989742900}, st_ex_calculated_birthtime = true, st_ex_blksize = 4096, st_ex_blocks = 424, st_ex_flags = 0, st_ex_mask = 0}} st = {st_ex_dev = 2082, st_ex_ino = , st_ex_mode = , st_ex_nlink = , st_ex_uid = , st_ex_gid = , st_ex_rdev = , st_ex_size = , st_ex_atime = {tv_sec = , tv_nsec = }, st_ex_mtime = {tv_sec = , tv_nsec = }, st_ex_ctime = {tv_sec = , tv_nsec = }, st_ex_btime = {tv_sec = , tv_nsec = }, st_ex_calculated_birthtime = , st_ex_blksize = , st_ex_blocks = , st_ex_flags = , st_ex_mask = } status = {v = 0} df_ret = __FUNCTION__ = "smbd_do_qfsinfo" #13 0x00007f10b6df20cf in smbd_smb2_getinfo_send (in_input_buffer=..., in_flags=, in_additional_information=, in_output_buffer_length=, in_file_info_class=, in_info_type=, fsp=0x55d33e2db7c0, smb2req=0x55d33e2d3f60, ev=0x55d33e29dcc0, mem_ctx=0x55d33e2d3f60) at ../source3/smbd/smb2_getinfo.c:430 file_info_level = 1008 data = 0x55d33e2dfb70 "" data_size = 0 fixed_portion = 0 state = 0x55d33e2d44a0 smbreq = conn = 0x55d33e2cd660 status = req = 0x55d33e2d4310 req = state = smbreq = conn = status = file_info_level = data = data_size = delete_pending = write_time_ts = fileid = ea_list = lock_data_count = lock_data = fixed_portion = file_info_level = data = data_size = fixed_portion = p_marshalled_sd = sd_size = #14 smbd_smb2_request_process_getinfo (req=req@entry=0x55d33e2d3f60) at ../source3/smbd/smb2_getinfo.c:120 xconn = status = inbody = in_info_type = in_file_info_class = in_output_buffer_length = in_input_buffer_offset = in_input_buffer_length = in_input_buffer = in_additional_information = in_flags = in_file_id_persistent = in_file_id_volatile = in_fsp = 0x55d33e2db7c0 subreq = __FUNCTION__ = "smbd_smb2_request_process_getinfo" #15 0x00007f10b6dde506 in smbd_smb2_request_dispatch (req=req@entry=0x55d33e2d3f60) at ../source3/smbd/smb2_server.c:2698 xconn = call = intf_v = inhdr = opcode = flags = mid = status = {v = 0} session_status = allowed_flags = return_value = x = signing_required = encryption_desired = encryption_required = __FUNCTION__ = "smbd_smb2_request_dispatch" #16 0x00007f10b6ddf16c in smbd_smb2_io_handler (fde_flags=, xconn=0x55d33e2ba280) at ../source3/smbd/smb2_server.c:3914 err = sconn = 0x55d33e2badd0 state = 0x55d33e2ba348 req = 0x55d33e2d3f60 min_recvfile_size = 4294967295 ret = retry = false status = now = sconn = state = req = min_recvfile_size = ret = err = retry = status = now = base = #17 smbd_smb2_connection_handler (ev=, fde=, flags=, private_data=) at ../source3/smbd/smb2_server.c:3952 xconn = 0x55d33e2ba280 status = #18 0x00007f10b3ceded0 in epoll_event_loop (tvalp=0x7ffe76d58d10, epoll_ev=0x55d33e2b4eb0) at ../tevent_epoll.c:728 fde = 0x55d33e2bd430 flags = mpx_fde = ret = i = 0 timeout = wait_errno = 0 events = {{events = 1, data = {ptr = 0x55d33e2bd430, fd = 1043059760, u32 = 1043059760, u64 = 94365769520176}}} ret = i = events = timeout = wait_errno = fde = flags = mpx_fde = handled_fde = handled_mpx = #19 epoll_event_loop_once (ev=, location=) at ../tevent_epoll.c:930 epoll_ev = 0x55d33e2b4eb0 tval = {tv_sec = 0, tv_usec = 999984} panic_triggered = false #20 0x00007f10b3cec357 in std_event_loop_once (ev=0x55d33e29dcc0, location=0x7f10b6eeca68 "../source3/smbd/process.c:4127") at ../tevent_standard.c:114 glue_ptr = glue = 0x55d33e29ddf0 ret = #21 0x00007f10b3ce87cd in _tevent_loop_once (ev=ev@entry=0x55d33e29dcc0, location=location@entry=0x7f10b6eeca68 "../source3/smbd/process.c:4127") at ../tevent.c:725 ret = nesting_stack_ptr = 0x0 #22 0x00007f10b3ce89eb in tevent_common_loop_wait (ev=0x55d33e29dcc0, location=0x7f10b6eeca68 "../source3/smbd/process.c:4127") at ../tevent.c:848 ret = #23 0x00007f10b3cec2f7 in std_event_loop_wait (ev=0x55d33e29dcc0, location=0x7f10b6eeca68 "../source3/smbd/process.c:4127") at ../tevent_standard.c:145 glue_ptr = glue = 0x55d33e29ddf0 ret = #24 0x00007f10b6dcef58 in smbd_process (ev_ctx=0x55d33e29dcc0, msg_ctx=, sock_fd=38, interactive=) at ../source3/smbd/process.c:4127 trace_state = {ev = 0x55d33e29dcc0, frame = 0x55d33e2dbb40} client = 0x55d33e2b9a40 sconn = 0x55d33e2badd0 xconn = 0x55d33e2ba280 locaddr = remaddr = ret = status = tv = {tv_sec = 1550219538, tv_usec = 103216} now = chroot_dir = rc = __func__ = "smbd_process" __FUNCTION__ = "smbd_process" #25 0x000055d33c0f6fcc in smbd_accept_connection (ev=0x55d33e29dcc0, fde=, flags=, private_data=) at ../source3/smbd/server.c:1030 status = s = 0x0 msg_ctx = 0x55d33e28eac0 addr = {ss_family = 2, __ss_padding = "\302Z\n\003\001\001\000\000\000\000\000\000\000\000`\237+>\323U\000\000pi*>\323U\000\000\340\216\325v\376\177\000\000\210i*>\323U\000\000\275\001\000\000\000\000\000\000\300\352(>\323U\000\000\300\334)>\323U\000\000\316\307γ\020\177\000\000\063\227\017<\323U\000\000\001\310γ\020\177\000\000fwf\\\000\000\000\000pi*>\323U\000\000\300\334)>\323U\000", __ss_align = 139709712878675} in_addrlen = 16 fd = 38 pid = 0 __FUNCTION__ = "smbd_accept_connection" #26 0x00007f10b3ceded0 in epoll_event_loop (tvalp=0x7ffe76d58f50, epoll_ev=0x55d33e29de80) at ../tevent_epoll.c:728 fde = 0x55d33e2b4970 flags = mpx_fde = ret = i = 0 timeout = wait_errno = 0 events = {{events = 1, data = {ptr = 0x55d33e2b4970, fd = 1043024240, u32 = 1043024240, u64 = 94365769484656}}} ret = i = events = timeout = wait_errno = fde = flags = mpx_fde = handled_fde = handled_mpx = #27 epoll_event_loop_once (ev=, location=) at ../tevent_epoll.c:930 epoll_ev = 0x55d33e29de80 tval = {tv_sec = 899, tv_usec = 175645} panic_triggered = false #28 0x00007f10b3cec357 in std_event_loop_once (ev=0x55d33e29dcc0, location=0x55d33c0fae2b "../source3/smbd/server.c:1397") at ../tevent_standard.c:114 glue_ptr = glue = 0x55d33e29ddf0 ret = #29 0x00007f10b3ce87cd in _tevent_loop_once (ev=ev@entry=0x55d33e29dcc0, location=location@entry=0x55d33c0fae2b "../source3/smbd/server.c:1397") at ../tevent.c:725 ret = nesting_stack_ptr = 0x0 #30 0x00007f10b3ce89eb in tevent_common_loop_wait (ev=0x55d33e29dcc0, location=0x55d33c0fae2b "../source3/smbd/server.c:1397") at ../tevent.c:848 ret = #31 0x00007f10b3cec2f7 in std_event_loop_wait (ev=0x55d33e29dcc0, location=0x55d33c0fae2b "../source3/smbd/server.c:1397") at ../tevent_standard.c:145 glue_ptr = glue = 0x55d33e29ddf0 ret = #32 0x000055d33c0f234a in smbd_parent_loop (parent=0x55d33e29d1b0, ev_ctx=0x55d33e29dcc0) at ../source3/smbd/server.c:1397 trace_state = {frame = 0x55d33e28ac50} ret = 0 trace_state = ret = #33 main (argc=, argv=) at ../source3/smbd/server.c:2164 is_daemon = interactive = Fork = no_process_group = log_stdout = ports = 0x0 profile_level = 0x0 opt = pc = print_build_options = main_server_id = {pid = 1516, task_id = 0, vnn = 4294967295, unique_id = 10823869260910516441} long_options = {{longName = 0x0, shortName = 0 '\000', argInfo = 4, arg = 0x7f10b40fe160 , val = 0, descrip = 0x55d33c0fa539 "Help options:", argDescrip = 0x0}, {longName = 0x55d33c0fa547 "daemon", shortName = 68 'D', argInfo = 0, arg = 0x0, val = 1000, descrip = 0x55d33c0fa54e "Become a daemon (default)", argDescrip = 0x0}, {longName = 0x55d33c0fa568 "interactive", shortName = 105 'i', argInfo = 0, arg = 0x0, val = 1001, descrip = 0x55d33c0fb328 "Run interactive (not a daemon) and log to stdout", argDescrip = 0x0}, {longName = 0x55d33c0fa574 "foreground", shortName = 70 'F', argInfo = 0, arg = 0x0, val = 1002, descrip = 0x55d33c0fb360 "Run daemon in foreground (for daemontools, etc.)", argDescrip = 0x0}, {longName = 0x55d33c0fa57f "no-process-group", shortName = 0 '\000', argInfo = 0, arg = 0x0, val = 1003, descrip = 0x55d33c0fb398 "Don't create a new process group", argDescrip = 0x0}, {longName = 0x55d33c0fa590 "log-stdout", shortName = 83 'S', argInfo = 0, arg = 0x0, val = 1004, descrip = 0x55d33c0fa59b "Log to stdout", argDescrip = 0x0}, {longName = 0x55d33c0fa5a9 "build-options", shortName = 98 'b', argInfo = 0, arg = 0x0, val = 98, descrip = 0x55d33c0fa5b7 "Print build options", argDescrip = 0x0}, {longName = 0x55d33c0fa5cb "port", shortName = 112 'p', argInfo = 1, arg = 0x7ffe76d59070, val = 0, descrip = 0x55d33c0fa5d0 "Listen on the specified ports", argDescrip = 0x0}, {longName = 0x55d33c0fa5ee "profiling-level", shortName = 80 'P', argInfo = 1, arg = 0x7ffe76d59078, val = 0, descrip = 0x55d33c0fa5fe "Set profiling level", argDescrip = 0x55d33c0fa612 "PROFILE_LEVEL"}, {longName = 0x0, shortName = 0 '\000', argInfo = 4, arg = 0x7f10b76024c0 , val = 0, descrip = 0x55d33c0fa620 "Common samba options:", argDescrip = 0x0}, {longName = 0x0, shortName = 0 '\000', argInfo = 0, arg = 0x0, val = 0, descrip = 0x0, argDescrip = 0x0}} parent = 0x55d33e29d1b0 frame = status = ev_ctx = 0x55d33e29dcc0 msg_ctx = server_id = {pid = 1516, task_id = 0, vnn = 4294967295, unique_id = 9325080257556801842} se = profiling_level = np_dir = smbd_shim_fns = {cancel_pending_lock_requests_by_fid = 0x7f10b6db7d50 , send_stat_cache_delete_message = 0x7f10b6dbde40 , change_to_root_user = 0x7f10b6da41f0 , become_authenticated_pipe_user = 0x7f10b6da4290 , unbecome_authenticated_pipe_user = 0x7f10b6da4340 , contend_level2_oplocks_begin = 0x7f10b6e06670 , contend_level2_oplocks_end = 0x7f10b6e069a0 , become_root = 0x7f10b6da4350 , unbecome_root = 0x7f10b6da4380 , exit_server = 0x7f10b6dfe840 , exit_server_cleanly = 0x7f10b6dfe860 } __FUNCTION__ = "main" __func__ = "main"