[Samba] TDB files is corrupted and Samba coredumped

[tu.qiuping]

Hello everyone,

Just a heads-up: my Samba server was restarted a moment ago, I found some non-persistent TDB files were corrupted, and Samba was unable to read them. However, by the time I identified this issue, CTDB had already restarted the Samba service. and I’ve attached the related logs below:


smbd: ../nptl/pthread_mutex_lock.c:81: __pthread_mutex_lock: Assertion `mutex->__data.__owner == 0' failed.
[2026/01/06 14:54:57.582091,  0] ../../lib/util/fault.c:173(smb_panic_log)
  ===============================================================
[2026/01/06 14:54:57.582148,  0] ../../lib/util/fault.c:177(smb_panic_log)
  INTERNAL ERROR: Signal 6: Aborted in pid 155149 (4.17.7)
[2026/01/06 14:54:57.582161,  0] ../../lib/util/fault.c:182(smb_panic_log)
  If you are running a recent Samba version, and if you think this problem is not yet fixed in the latest versions, please consider reporting this bug, see https://wiki.samba.org/index.php/Bug_Reporting
[2026/01/06 14:54:57.582172,  0] ../../lib/util/fault.c:183(smb_panic_log)
  ===============================================================
[2026/01/06 14:54:57.582183,  0] ../../lib/util/fault.c:185(smb_panic_log)
  PANIC (pid 155149): Signal 6: Aborted in 4.17.7
[2026/01/06 14:54:57.582627,  0] ../../lib/util/fault.c:293(log_stack_trace)
  BACKTRACE: 43 stack frames:
   #0 /usr/lib64/samba/libgenrand-samba4.so(log_stack_trace+0x34) [0x7f9ffda90764]
   #1 /usr/lib64/samba/libgenrand-samba4.so(smb_panic+0xd) [0x7f9ffda909bd]
   #2 /usr/lib64/samba/libgenrand-samba4.so(+0x1a59) [0x7f9ffda90a59]
   #3 /lib64/libpthread.so.0(+0x12ec0) [0x7f9ffd812ec0]
   #4 /lib64/libc.so.6(gsignal+0x10f) [0x7f9ffd04eaff]
   #5 /lib64/libc.so.6(abort+0x127) [0x7f9ffd021ea5]
   #6 /lib64/libc.so.6(+0x21d79) [0x7f9ffd021d79]
   #7 /lib64/libc.so.6(+0x47456) [0x7f9ffd047456]
   #8 /lib64/libpthread.so.0(__pthread_mutex_lock+0x241) [0x7f9ffd80adf1]
   #9 /lib64/libtdb.so.1(+0xfd8e) [0x7f9ffd790d8e]
   #10 /lib64/libtdb.so.1(+0x10143) [0x7f9ffd791143]
   #11 /lib64/libtdb.so.1(+0x7d50) [0x7f9ffd788d50]
   #12 /lib64/libtdb.so.1(+0x83b9) [0x7f9ffd7893b9]
   #13 /lib64/libtdb.so.1(+0x86d1) [0x7f9ffd7896d1]
   #14 /lib64/libtdb.so.1(+0x876b) [0x7f9ffd78976b]
   #15 /lib64/libtdb.so.1(tdb_chainlock+0x2e) [0x7f9ffd78998e]
   #16 /usr/lib64/samba/libdbwrap-samba4.so(+0x773a) [0x7f9ffd7c573a]
   #17 /usr/lib64/samba/libdbwrap-samba4.so(dbwrap_fetch_locked+0xb7) [0x7f9ffd7c2527]
   #18 /usr/lib64/samba/libsmbd-base-samba4.so(+0xda5b2) [0x7f9ffdd045b2]
   #19 /usr/lib64/samba/libsmbd-base-samba4.so(smbXsrv_open_create+0x1a2) [0x7f9ffdd05942]
   #20 /usr/lib64/samba/libsmbd-base-samba4.so(fsp_bind_smb+0x51) [0x7f9ffdc84511]
   #21 /usr/lib64/samba/libsmbd-base-samba4.so(+0x88132) [0x7f9ffdcb2132]
   #22 /usr/lib64/samba/libsmbd-base-samba4.so(create_file_default+0x336) [0x7f9ffdcb46b6]
   #23 /usr/lib64/samba/libsmbd-base-samba4.so(smbd_smb2_request_process_create+0xd43) [0x7f9ffdcea2a3]
   #24 /usr/lib64/samba/libsmbd-base-samba4.so(smbd_smb2_request_dispatch+0x12f5) [0x7f9ffdcdf715]
   #25 /usr/lib64/samba/libsmbd-base-samba4.so(+0xb7289) [0x7f9ffdce1289]
   #26 /lib64/libtevent.so.0(tevent_common_invoke_fd_handler+0x97) [0x7f9ffda37717]
   #27 /lib64/libtevent.so.0(+0x10e27) [0x7f9ffda3ee27]
   #28 /lib64/libtevent.so.0(+0xe38b) [0x7f9ffda3c38b]
   #29 /lib64/libtevent.so.0(_tevent_loop_once+0x95) [0x7f9ffda368a5]
   #30 /lib64/libtevent.so.0(tevent_common_loop_wait+0x1b) [0x7f9ffda36b6b]
   #31 /lib64/libtevent.so.0(+0xe31b) [0x7f9ffda3c31b]
   #32 /usr/lib64/samba/libsmbd-base-samba4.so(smbd_process+0x840) [0x7f9ffdccdde0]
   #33 /usr/sbin/smbd(+0xace0) [0x55ba46c70ce0]
   #34 /lib64/libtevent.so.0(tevent_common_invoke_fd_handler+0x97) [0x7f9ffda37717]
   #35 /lib64/libtevent.so.0(+0x10e27) [0x7f9ffda3ee27]
   #36 /lib64/libtevent.so.0(+0xe38b) [0x7f9ffda3c38b]
   #37 /lib64/libtevent.so.0(_tevent_loop_once+0x95) [0x7f9ffda368a5]
   #38 /lib64/libtevent.so.0(tevent_common_loop_wait+0x1b) [0x7f9ffda36b6b]
   #39 /lib64/libtevent.so.0(+0xe31b) [0x7f9ffda3c31b]
   #40 /usr/sbin/smbd(main+0x13a0) [0x55ba46c6df10]
   #41 /lib64/libc.so.6(__libc_start_main+0xe5) [0x7f9ffd03ad85]
   #42 /usr/sbin/smbd(_start+0x2e) [0x55ba46c6e92e]
[2026/01/06 14:54:57.582927,  0] ../../source3/lib/dumpcore.c:315(dump_core)
  dumping core in /var/lib/placements/vsan/coredump



Could you help me figure out what might be causing this issue? My Samba version is 4.17.7 and my TDB version is 1.4.7.


Thanks for your help!