[Samba] error in sernet samba

[adam_xu at adagene.com.cn]

Hi sambalist,

 I'm using sernet samba for several years. I found that there's error in the log.samba file like this:

[2019/07/10 14:55:25.892988,  0] ../../lib/util/fault.c:79(fault_report)
  ===============================================================
[2019/07/10 14:55:25.893187,  0] ../../lib/util/fault.c:80(fault_report)
  INTERNAL ERROR: Signal 11 in pid 9906 (4.10.6-SerNet-RedHat-5.el7)
  Please read the Trouble-Shooting section of the Samba HOWTO
[2019/07/10 14:55:25.893241,  0] ../../lib/util/fault.c:82(fault_report)
  ===============================================================
[2019/07/10 14:55:25.893272,  0] ../../lib/util/fault.c:128(smb_panic_default)
  smb_panic_default: PANIC (pid 9906): internal error
[2019/07/10 14:55:25.894560,  0] ../../lib/util/fault.c:261(log_stack_trace)
  BACKTRACE: 58 stack frames:
   #0 /usr/lib64/samba/libsamba-util.so.0(log_stack_trace+0x2f) [0x7f3dfe3ce32d]
   #1 /usr/lib64/samba/libsamba-util.so.0(smb_panic+0xa2) [0x7f3dfe3ce492]
   #2 /usr/lib64/samba/libsamba-util.so.0(+0x13771) [0x7f3dfe3ce771]
   #3 /lib64/libpthread.so.0(+0xf5d0) [0x7f3df0a2e5d0]
   #4 /usr/lib64/samba/ldb/dirsync.so(+0x3dbd) [0x7f3de37c3dbd]
   #5 /usr/lib64/samba/ldb/dirsync.so(+0x4b4e) [0x7f3de37c4b4e]
   #6 /usr/lib64/samba/libldb.so.1(ldb_module_send_entry+0x144) [0x7f3dfd9497dc]
   #7 /usr/lib64/samba/ldb/ranged_results.so(+0x15dc) [0x7f3ddfab65dc]
   #8 /usr/lib64/samba/libldb.so.1(ldb_module_send_entry+0x144) [0x7f3dfd9497dc]
   #9 /usr/lib64/samba/ldb/acl.so(+0x74ed) [0x7f3de43f14ed]
   #10 /usr/lib64/samba/libldb.so.1(ldb_module_send_entry+0x144) [0x7f3dfd9497dc]
   #11 /usr/lib64/samba/ldb/encrypted_secrets.so(+0x3cc6) [0x7f3de31aacc6]
   #12 /usr/lib64/samba/libldb.so.1(ldb_module_send_entry+0x144) [0x7f3dfd9497dc]
   #13 /usr/lib64/samba/ldb/operational.so(+0x3a5b) [0x7f3de092aa5b]
   #14 /usr/lib64/samba/libldb.so.1(ldb_module_send_entry+0x144) [0x7f3dfd9497dc]
   #15 /usr/lib64/samba/ldb/extended_dn_out.so(+0x2cee) [0x7f3de2d9ccee]
   #16 /usr/lib64/samba/ldb/extended_dn_out.so(+0x354d) [0x7f3de2d9d54d]
   #17 /usr/lib64/samba/libldb.so.1(ldb_module_send_entry+0x144) [0x7f3dfd9497dc]
   #18 /usr/lib64/samba/libdsdb-module-samba4.so(dsdb_next_callback+0x6d) [0x7f3de8f24ca7]
   #19 /usr/lib64/samba/libldb.so.1(ldb_module_send_entry+0x144) [0x7f3dfd9497dc]
   #20 /usr/lib64/samba/ldb/partition.so(+0x56e8) [0x7f3de03146e8]
   #21 /usr/lib64/samba/libldb.so.1(ldb_module_send_entry+0x144) [0x7f3dfd9497dc]
   #22 /usr/lib64/samba/libldb-key-value-samba4.so(ldb_kv_search_indexed+0x6f3) [0x7f3de1f72518]
   #23 /usr/lib64/samba/libldb-key-value-samba4.so(ldb_kv_search+0x368) [0x7f3de1f6ee2e]
   #24 /usr/lib64/samba/libldb-key-value-samba4.so(+0x56a3) [0x7f3de1f6d6a3]
   #25 /usr/lib64/samba/libtevent.so.0(tevent_common_invoke_timer_handler+0x172) [0x7f3dfc8b5bbc]
   #26 /usr/lib64/samba/libtevent.so.0(tevent_common_loop_timer_delay+0xa6) [0x7f3dfc8b5d22]
   #27 /usr/lib64/samba/libtevent.so.0(+0xc180) [0x7f3dfc8b7180]
   #28 /usr/lib64/samba/libtevent.so.0(+0xa167) [0x7f3dfc8b5167]
   #29 /usr/lib64/samba/libtevent.so.0(_tevent_loop_once+0xa3) [0x7f3dfc8b0880]
   #30 /usr/lib64/samba/libldb.so.1(ldb_wait+0x143) [0x7f3dfd946542]
   #31 /usr/lib64/samba/service/ldap.so(ldapsrv_do_call+0x81f) [0x7f3de564f53e]
   #32 /usr/lib64/samba/service/ldap.so(+0x558f) [0x7f3de564c58f]
   #33 /usr/lib64/samba/libtevent.so.0(+0x67a4) [0x7f3dfc8b17a4]
   #34 /usr/lib64/samba/libtevent.so.0(tevent_common_invoke_immediate_handler+0x125) [0x7f3dfc8b147c]
   #35 /usr/lib64/samba/libtevent.so.0(tevent_common_loop_immediate+0x1c) [0x7f3dfc8b14ae]
   #36 /usr/lib64/samba/libtevent.so.0(+0xc16b) [0x7f3dfc8b716b]
   #37 /usr/lib64/samba/libtevent.so.0(+0xa167) [0x7f3dfc8b5167]
   #38 /usr/lib64/samba/libtevent.so.0(_tevent_loop_once+0xa3) [0x7f3dfc8b0880]
   #39 /usr/lib64/samba/libtevent.so.0(tevent_common_loop_wait+0x17) [0x7f3dfc8b0a6e]
   #40 /usr/lib64/samba/libtevent.so.0(+0xa117) [0x7f3dfc8b5117]
   #41 /usr/lib64/samba/libtevent.so.0(_tevent_loop_wait+0xa) [0x7f3dfc8b0ad6]
   #42 /usr/lib64/samba/process_model/standard.so(+0x2e16) [0x7f3de99ffe16]
   #43 /usr/lib64/samba/libservice-samba4.so(+0x38b3) [0x7f3dfdd908b3]
   #44 /usr/lib64/samba/libtevent.so.0(tevent_common_invoke_fd_handler+0x82) [0x7f3dfc8b105f]
   #45 /usr/lib64/samba/libtevent.so.0(+0xc415) [0x7f3dfc8b7415]
   #46 /usr/lib64/samba/libtevent.so.0(+0xa167) [0x7f3dfc8b5167]
   #47 /usr/lib64/samba/libtevent.so.0(_tevent_loop_once+0xa3) [0x7f3dfc8b0880]
   #48 /usr/lib64/samba/libtevent.so.0(tevent_common_loop_wait+0x17) [0x7f3dfc8b0a6e]
   #49 /usr/lib64/samba/libtevent.so.0(+0xa117) [0x7f3dfc8b5117]
   #50 /usr/lib64/samba/libtevent.so.0(_tevent_loop_wait+0xa) [0x7f3dfc8b0ad6]
   #51 /usr/lib64/samba/process_model/standard.so(+0x2630) [0x7f3de99ff630]
   #52 /usr/lib64/samba/libservice-samba4.so(task_server_startup+0x61) [0x7f3dfdd91d6d]
   #53 /usr/lib64/samba/libservice-samba4.so(server_service_startup+0x15c) [0x7f3dfdd907b3]
   #54 /usr/sbin/samba(+0x5e4d) [0x5654cae0de4d]
   #55 /usr/sbin/samba(main+0x2b) [0x5654cae0e165]
   #56 /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f3deffa6495]
   #57 /usr/sbin/samba(+0x4299) [0x5654cae0c299]
[2019/07/10 14:55:25.898651,  0] ../../source4/smbd/process_standard.c:160(standard_child_pipe_handler)
  standard_child_pipe_handler: Child 9906 () terminated with signal 6

This error usually occurs after 30 minutes of restarting samba. but it seems that the AD DC function  is not affected. Does this  bug exist in all samba or only in sernet samba？
my OS：centos 7.6
samba version: sernet 4.9.11 or 4.10.6

Best,


yours Adam