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[Bug 1885086] [NEW] samba-ad-dc dns update crash

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Public bug reported:

Linux 5.6.12-sunxi64 #trunk.133 SMP Wed May 13 18:09:20 CEST 2020 aarch64 aarch64 aarch64 GNU/Linux
Ubuntu 20.04 LTS
samba 2:4.11.6+dfsg-0ubuntu1.2

[2020/06/24 13:34:06.105595,  0] ../../lib/util/fault.c:79(fault_report)
  ===============================================================
[2020/06/24 13:34:06.105904,  0] ../../lib/util/fault.c:80(fault_report)
  INTERNAL ERROR: Signal 11 in pid 1340 (4.11.6-Ubuntu)
  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
[2020/06/24 13:34:06.106039,  0] ../../lib/util/fault.c:86(fault_report)
  ===============================================================
[2020/06/24 13:34:06.106143,  0] ../../lib/util/fault.c:131(smb_panic_default)
  smb_panic_default: PANIC (pid 1340): internal error
[2020/06/24 13:34:06.108834,  0] ../../lib/util/fault.c:264(log_stack_trace)
  BACKTRACE: 25 stack frames:
   #0 /lib/aarch64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x38) [0xffffa0e0c760]
   #1 /lib/aarch64-linux-gnu/libsamba-util.so.0(smb_panic+0x50) [0xffffa0e0c898]
   #2 /lib/aarch64-linux-gnu/libsamba-util.so.0(+0x15afc) [0xffffa0e0cafc]
   #3 linux-vdso.so.1(__kernel_rt_sigreturn+0) [0xffffa0f9b574]
   #4 /lib/aarch64-linux-gnu/libc.so.6(+0x7b2d0) [0xffffa09b82d0]
   #5 /lib/aarch64-linux-gnu/libc.so.6(+0x7befc) [0xffffa09b8efc]
   #6 /lib/aarch64-linux-gnu/libc.so.6(realloc+0xa8) [0xffffa09b9e30]
   #7 /lib/aarch64-linux-gnu/libtalloc.so.2(_talloc_realloc+0xe0) [0xffffa0b4f2b0]
   #8 /usr/lib/aarch64-linux-gnu/samba/libMESSAGING.so.0(imessaging_register+0x4c) [0xffffa0bbfa34]
   #9 /usr/lib/aarch64-linux-gnu/samba/libMESSAGING.so.0(imessaging_init+0x1e0) [0xffffa0bc0190]
   #10 /usr/lib/aarch64-linux-gnu/samba/libservice.so.0(+0x3444) [0xffffa0f05444]
   #11 /usr/lib/aarch64-linux-gnu/samba/libprocess-model.so.0(+0x14b0) [0xffffa0e7e4b0]
   #12 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_invoke_fd_handler+0x88) [0xffffa0ab4390]
   #13 /lib/aarch64-linux-gnu/libtevent.so.0(+0xc668) [0xffffa0aba668]
   #14 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa72c) [0xffffa0ab872c]
   #15 /lib/aarch64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x94) [0xffffa0ab3a4c]
   #16 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x20) [0xffffa0ab3cc8]
   #17 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa6a4) [0xffffa0ab86a4]
   #18 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x2060) [0xffff9f2c4060]
   #19 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x24a0) [0xffff9f2c44a0]
   #20 /usr/lib/aarch64-linux-gnu/samba/libservice.so.0(task_server_startup+0x6c) [0xffffa0f06084]
   #21 /usr/lib/aarch64-linux-gnu/samba/libservice.so.0(server_service_startup+0x98) [0xffffa0f048b0]
   #22 samba: task[rpc] pre-forked worker(0)(+0x5268) [0xaaaaaab40268]
   #23 /lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe8) [0xffffa0961090]
   #24 samba: task[rpc] pre-forked worker(0)(+0x3dac) [0xaaaaaab3edac]
[2020/06/24 13:34:06.131543,  0] ../../source4/smbd/process_prefork.c:518(prefork_child_pipe_handler)
  prefork_child_pipe_handler: Parent 1308, Child 1340 terminated with signal 6
[2020/06/24 13:34:06.131988,  0] ../../source4/smbd/process_prefork.c:461(prefork_restart)
  prefork_restart: Restarting [rpc] pre-fork worker(0)
...
[2020/06/24 21:38:36.786202,  0] ../../lib/util/fault.c:79(fault_report)
  ===============================================================
[2020/06/24 21:38:36.786590,  0] ../../lib/util/fault.c:80(fault_report)
  INTERNAL ERROR: Signal 11 in pid 1367 (4.11.6-Ubuntu)
  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
[2020/06/24 21:38:36.786753,  0] ../../lib/util/fault.c:86(fault_report)
  ===============================================================
[2020/06/24 21:38:36.786855,  0] ../../lib/util/fault.c:131(smb_panic_default)
  smb_panic_default: PANIC (pid 1367): internal error
[2020/06/24 21:38:36.789611,  0] ../../lib/util/fault.c:264(log_stack_trace)
  BACKTRACE: 30 stack frames:
   #0 /lib/aarch64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x38) [0xffffa0e0c760]
   #1 /lib/aarch64-linux-gnu/libsamba-util.so.0(smb_panic+0x50) [0xffffa0e0c898]
   #2 /lib/aarch64-linux-gnu/libsamba-util.so.0(+0x15afc) [0xffffa0e0cafc]
   #3 linux-vdso.so.1(__kernel_rt_sigreturn+0) [0xffffa0f9b574]
   #4 /lib/aarch64-linux-gnu/libc.so.6(+0x78b08) [0xffffa09b5b08]
   #5 /lib/aarch64-linux-gnu/libc.so.6(+0x7b308) [0xffffa09b8308]
   #6 /lib/aarch64-linux-gnu/libc.so.6(__libc_malloc+0x8c) [0xffffa09b95cc]
   #7 /lib/aarch64-linux-gnu/libtalloc.so.2(_talloc_array+0x23c) [0xffffa0b4d22c]
   #8 /lib/aarch64-linux-gnu/libsamba-util.so.0(data_blob_talloc_named+0xa4) [0xffffa0e07714]
   #9 /usr/lib/aarch64-linux-gnu/samba/libgensec.so.0(+0x8f54) [0xffffa0f35f54]
   #10 /usr/lib/aarch64-linux-gnu/samba/libsamba-sockets.so.0(tstream_writev_send+0x164) [0xffffa0608dcc]
   #11 /usr/lib/aarch64-linux-gnu/samba/libsamba-sockets.so.0(+0x6404) [0xffffa0609404]
   #12 /lib/aarch64-linux-gnu/libtevent.so.0(+0x6990) [0xffffa0ab4990]
   #13 /usr/lib/aarch64-linux-gnu/samba/libsamba-sockets.so.0(tstream_writev_queue_send+0x94) [0xffffa0609b34]
   #14 /usr/lib/aarch64-linux-gnu/samba/service/ldap.so(+0x6734) [0xffff9f290734]
   #15 /usr/lib/aarch64-linux-gnu/samba/service/ldap.so(+0x68d8) [0xffff9f2908d8]
   #16 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_invoke_immediate_handler+0x14c) [0xffffa0ab47fc]
   #17 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_immediate+0x28) [0xffffa0ab4828]
   #18 /lib/aarch64-linux-gnu/libtevent.so.0(+0xc474) [0xffffa0aba474]
   #19 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa72c) [0xffffa0ab872c]
   #20 /lib/aarch64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x94) [0xffffa0ab3a4c]
   #21 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x20) [0xffffa0ab3cc8]
   #22 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa6a4) [0xffffa0ab86a4]
   #23 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x2060) [0xffff9f2c4060]
   #24 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x24a0) [0xffff9f2c44a0]
   #25 /usr/lib/aarch64-linux-gnu/samba/libservice.so.0(task_server_startup+0x6c) [0xffffa0f06084]
   #26 /usr/lib/aarch64-linux-gnu/samba/libservice.so.0(server_service_startup+0x98) [0xffffa0f048b0]
   #27 samba: task[ldap] pre-forked worker(3)(+0x5268) [0xaaaaaab40268]
   #28 /lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe8) [0xffffa0961090]
   #29 samba: task[ldap] pre-forked worker(3)(+0x3dac) [0xaaaaaab3edac]
[2020/06/24 21:38:36.809297,  0] ../../source4/smbd/process_prefork.c:518(prefork_child_pipe_handler)
  prefork_child_pipe_handler: Parent 1315, Child 1367 terminated with signal 6
[2020/06/24 21:38:36.809748,  0] ../../source4/smbd/process_prefork.c:461(prefork_restart)
  prefork_restart: Restarting [ldap] pre-fork worker(3)
...
[2020/06/25 01:51:05.897978,  0] ../../lib/util/fault.c:79(fault_report)
  ===============================================================
[2020/06/25 01:51:05.899092,  0] ../../lib/util/fault.c:80(fault_report)
  INTERNAL ERROR: Signal 11 in pid 1309 (4.11.6-Ubuntu)
  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
[2020/06/25 01:51:05.899702,  0] ../../lib/util/fault.c:86(fault_report)
  ===============================================================
[2020/06/25 01:51:05.900070,  0] ../../source3/lib/util.c:823(smb_panic_s3)
[2020/06/25 01:51:05.899841,  0] ../../lib/util/fault.c:79(fault_report)
  PANIC (pid 1309): internal error
  ===============================================================
[2020/06/25 01:51:05.900980,  0] ../../lib/util/fault.c:80(fault_report)
  INTERNAL ERROR: Signal 11 in pid 48073 (4.11.6-Ubuntu)
  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
[2020/06/25 01:51:05.901563,  0] ../../lib/util/fault.c:86(fault_report)
  ===============================================================
[2020/06/25 01:51:05.901776,  0] ../../source3/lib/util.c:823(smb_panic_s3)
  PANIC (pid 48073): internal error
[2020/06/25 01:51:05.906474,  0] ../../lib/util/fault.c:264(log_stack_trace)
  BACKTRACE: 21 stack frames:
   #0 /lib/aarch64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x38) [0xffffbd423760]
   #1 /lib/aarch64-linux-gnu/libsmbconf.so.0(smb_panic_s3+0x20) [0xffffbd3c0fd0]
   #2 /lib/aarch64-linux-gnu/libsamba-util.so.0(smb_panic+0x34) [0xffffbd42387c]
   #3 /lib/aarch64-linux-gnu/libsamba-util.so.0(+0x15afc) [0xffffbd423afc]
   #4 linux-vdso.so.1(__kernel_rt_sigreturn+0) [0xffffbd83c574]
   #5 /lib/aarch64-linux-gnu/libc.so.6(__libc_malloc+0x110) [0xffffbc9fe650]
   #6 /lib/aarch64-linux-gnu/libtalloc.so.2(talloc_named_const+0x10c) [0xffffbcb6a32c]
   #7 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_add_fd+0x50) [0xffffbcb18230]
   #8 /lib/aarch64-linux-gnu/libtevent.so.0(+0xc1b4) [0xffffbcb1e1b4]
   #9 /usr/lib/aarch64-linux-gnu/samba/libsmb-transport.so.0(read_packet_send+0xf4) [0xffffbc1af6b4]
   #10 /lib/aarch64-linux-gnu/libsmbconf.so.0(+0x34dd4) [0xffffbd39bdd4]
   #11 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_invoke_timer_handler+0xfc) [0xffffbcb1d12c]
   #12 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_timer_delay+0x9c) [0xffffbcb1d2bc]
   #13 /lib/aarch64-linux-gnu/libtevent.so.0(+0xc724) [0xffffbcb1e724]
   #14 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa72c) [0xffffbcb1c72c]
   #15 /lib/aarch64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x94) [0xffffbcb17a4c]
   #16 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x20) [0xffffbcb17cc8]
   #17 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa6a4) [0xffffbcb1c6a4]
   #18 /usr/sbin/smbd(main+0x196c) [0xaaaad5bbe2ec]
   #19 /lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe8) [0xffffbc9a6090]
   #20 /usr/sbin/smbd(+0x85e8) [0xaaaad5bbe5e8]
[2020/06/25 01:51:05.908676,  0] ../../source3/lib/dumpcore.c:315(dump_core)
  dumping core in /var/log/samba/cores/smbd
[2020/06/25 01:51:05.913208,  0] ../../lib/util/fault.c:264(log_stack_trace)
  BACKTRACE: 21 stack frames:
   #0 /lib/aarch64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x38) [0xffffbd423760]
   #1 /lib/aarch64-linux-gnu/libsmbconf.so.0(smb_panic_s3+0x20) [0xffffbd3c0fd0]
   #2 /lib/aarch64-linux-gnu/libsamba-util.so.0(smb_panic+0x34) [0xffffbd42387c]
   #3 /lib/aarch64-linux-gnu/libsamba-util.so.0(+0x15afc) [0xffffbd423afc]
   #4 linux-vdso.so.1(__kernel_rt_sigreturn+0) [0xffffbd83c574]
   #5 /lib/aarch64-linux-gnu/libc.so.6(__libc_malloc+0x110) [0xffffbc9fe650]
   #6 /lib/aarch64-linux-gnu/libtalloc.so.2(talloc_named_const+0x10c) [0xffffbcb6a32c]
   #7 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_add_fd+0x50) [0xffffbcb18230]
   #8 /lib/aarch64-linux-gnu/libtevent.so.0(+0xc1b4) [0xffffbcb1e1b4]
   #9 /lib/aarch64-linux-gnu/libsmbconf.so.0(reinit_after_fork+0xf0) [0xffffbd3c0738]
   #10 /lib/aarch64-linux-gnu/libsmbconf.so.0(+0x34d2c) [0xffffbd39bd2c]
   #11 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_invoke_timer_handler+0xfc) [0xffffbcb1d12c]
   #12 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_timer_delay+0x9c) [0xffffbcb1d2bc]
   #13 /lib/aarch64-linux-gnu/libtevent.so.0(+0xc724) [0xffffbcb1e724]
   #14 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa72c) [0xffffbcb1c72c]
   #15 /lib/aarch64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x94) [0xffffbcb17a4c]
   #16 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x20) [0xffffbcb17cc8]
   #17 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa6a4) [0xffffbcb1c6a4]
   #18 /usr/sbin/smbd(main+0x196c) [0xaaaad5bbe2ec]
   #19 /lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe8) [0xffffbc9a6090]
   #20 /usr/sbin/smbd(+0x85e8) [0xaaaad5bbe5e8]
[2020/06/25 01:51:05.915610,  0] ../../source3/lib/dumpcore.c:315(dump_core)
  dumping core in /var/log/samba/cores/smbd

[2020/06/24 23:34:12.096374,  0] ../../lib/util/fault.c:79(fault_report)
  ===============================================================
[2020/06/24 23:34:12.097112,  0] ../../lib/util/fault.c:80(fault_report)
  INTERNAL ERROR: Signal 11 in pid 47392 (4.11.6-Ubuntu)
  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
[2020/06/24 23:34:12.097521,  0] ../../lib/util/fault.c:86(fault_report)
  ===============================================================
[2020/06/24 23:34:12.097888,  0] ../../lib/util/fault.c:131(smb_panic_default)
  smb_panic_default: PANIC (pid 47392): internal error
[2020/06/24 23:34:12.104053,  0] ../../lib/util/fault.c:264(log_stack_trace)
  BACKTRACE: 34 stack frames:
   #0 /lib/aarch64-linux-gnu/libsamba-util.so.0(log_stack_trace+0x38) [0xffffa0e0c760]
   #1 /lib/aarch64-linux-gnu/libsamba-util.so.0(smb_panic+0x50) [0xffffa0e0c898]
   #2 /lib/aarch64-linux-gnu/libsamba-util.so.0(+0x15afc) [0xffffa0e0cafc]
   #3 linux-vdso.so.1(__kernel_rt_sigreturn+0) [0xffffa0f9b574]
   #4 /lib/aarch64-linux-gnu/libc.so.6(+0x78c70) [0xffffa09b5c70]
   #5 /lib/aarch64-linux-gnu/libc.so.6(+0x7ac38) [0xffffa09b7c38]
   #6 /lib/aarch64-linux-gnu/libc.so.6(+0x7befc) [0xffffa09b8efc]
   #7 /lib/aarch64-linux-gnu/libc.so.6(realloc+0xa8) [0xffffa09b9e30]
   #8 /lib/aarch64-linux-gnu/libtalloc.so.2(_talloc_realloc+0xe0) [0xffffa0b4f2b0]
   #9 /usr/lib/aarch64-linux-gnu/samba/libMESSAGING.so.0(imessaging_register+0x4c) [0xffffa0bbfa34]
   #10 /usr/lib/aarch64-linux-gnu/samba/libMESSAGING.so.0(imessaging_init+0x1e0) [0xffffa0bc0190]
   #11 /usr/lib/aarch64-linux-gnu/samba/libservice.so.0(+0x3444) [0xffffa0f05444]
   #12 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x2cd0) [0xffff9f2c4cd0]
   #13 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_invoke_fd_handler+0x88) [0xffffa0ab4390]
   #14 /lib/aarch64-linux-gnu/libtevent.so.0(+0xc668) [0xffffa0aba668]
   #15 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa72c) [0xffffa0ab872c]
   #16 /lib/aarch64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x94) [0xffffa0ab3a4c]
   #17 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x20) [0xffffa0ab3cc8]
   #18 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa6a4) [0xffffa0ab86a4]
   #19 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x2060) [0xffff9f2c4060]
   #20 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x2850) [0xffff9f2c4850]
   #21 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x2ac4) [0xffff9f2c4ac4]
   #22 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_invoke_fd_handler+0x88) [0xffffa0ab4390]
   #23 /lib/aarch64-linux-gnu/libtevent.so.0(+0xc668) [0xffffa0aba668]
   #24 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa72c) [0xffffa0ab872c]
   #25 /lib/aarch64-linux-gnu/libtevent.so.0(_tevent_loop_once+0x94) [0xffffa0ab3a4c]
   #26 /lib/aarch64-linux-gnu/libtevent.so.0(tevent_common_loop_wait+0x20) [0xffffa0ab3cc8]
   #27 /lib/aarch64-linux-gnu/libtevent.so.0(+0xa6a4) [0xffffa0ab86a4]
   #28 /usr/lib/aarch64-linux-gnu/samba/process_model/prefork.so(+0x24c8) [0xffff9f2c44c8]
   #29 /usr/lib/aarch64-linux-gnu/samba/libservice.so.0(task_server_startup+0x6c) [0xffffa0f06084]
   #30 /usr/lib/aarch64-linux-gnu/samba/libservice.so.0(server_service_startup+0x98) [0xffffa0f048b0]
   #31 samba: task[ldap] pre-forked worker(3)(+0x5268) [0xaaaaaab40268]
   #32 /lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe8) [0xffffa0961090]
   #33 samba: task[ldap] pre-forked worker(3)(+0x3dac) [0xaaaaaab3edac]
[2020/06/24 23:34:12.142917,  0] ../../source4/smbd/process_prefork.c:518(prefork_child_pipe_handler)
  prefork_child_pipe_handler: Parent 1315, Child 47392 terminated with signal 6
[2020/06/24 23:34:12.143503,  0] ../../source4/smbd/process_prefork.c:440(prefork_restart)
  prefork_restart: Restarting [ldap] pre-fork worker in (10) seconds
[2020/06/24 23:34:22.143798,  0] ../../source4/smbd/process_prefork.c:461(prefork_restart)
  prefork_restart: Restarting [ldap] pre-fork worker(3)
...
[2020/06/24 23:48:44.318671,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc: Traceback (most recent call last):
[2020/06/24 23:48:44.319102,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/sbin/samba_kcc", line 47, in <module>
[2020/06/24 23:48:44.319252,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.kcc.graph_utils import verify_and_dot, list_verify_tests
[2020/06/24 23:48:44.319316,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/kcc/__init__.py", line 27, in <module>
[2020/06/24 23:48:44.319431,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba import ldb, dsdb, drs_utils
[2020/06/24 23:48:44.319492,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/drs_utils.py", line 20, in <module>
[2020/06/24 23:48:44.319601,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.dcerpc import drsuapi, misc, drsblobs
[2020/06/24 23:48:44.319711,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc: ImportError: /usr/lib/python3/dist-packages/samba/dcerpc/lsa.cpython-38-aarch64-linux-gnu.so: undefined symbol: dcerpc_lsa_Qu%ryInfoPolicy_r, version SAMBA_4.11.6_UBUNTU
[2020/06/24 23:48:44.402117,  0] ../../source4/dsdb/kcc/kcc_periodic.c:767(samba_kcc_done)
  ../../source4/dsdb/kcc/kcc_periodic.c:767: Failed samba_kcc - NT_STATUS_ACCESS_DENIED
...
malloc(): unsorted double linked list corrupted
[2020/06/25 00:15:26.773201,  0] ../../lib/util/fault.c:79(fault_report)
[2020/06/25 00:15:26.811775,  0] ../../source4/smbd/process_prefork.c:511(prefork_child_pipe_handler)
  prefork_child_pipe_handler: Parent 1308, Child 46204 exited with status 1
[2020/06/25 00:15:26.812306,  0] ../../source4/smbd/process_prefork.c:440(prefork_restart)
  prefork_restart: Restarting [rpc] pre-fork worker in (10) seconds
[2020/06/25 00:15:36.812637,  0] ../../source4/smbd/process_prefork.c:461(prefork_restart)
  prefork_restart: Restarting [rpc] pre-fork worker(0)
...
[2020/06/25 01:33:45.321235,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc: Traceback (most recent call last):
[2020/06/25 01:33:45.321673,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/sbin/samba_kcc", line 47, in <module>
[2020/06/25 01:33:45.321820,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.kcc.graph_utils import verify_and_dot, list_verify_tests
[2020/06/25 01:33:45.321883,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/kcc/__init__.py", line 27, in <module>
[2020/06/25 01:33:45.321988,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba import ldb, dsdb, drs_utils
[2020/06/25 01:33:45.322049,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/drs_utils.py", line 20, in <module>
[2020/06/25 01:33:45.322152,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.dcerpc import drsuapi, misc, drsblobs
[2020/06/25 01:33:45.322213,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/dcerpc/__init__.py", line 18, in <module>
[2020/06/25 01:33:45.322273,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.dcerpc.base import *
[2020/06/25 01:33:45.322334,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc: ImportError: libsamba-python.cpython-38-aarch64-lin5x-gnu.so.0: cannot open shared object file: No such file or directory
[2020/06/25 01:33:45.403302,  0] ../../source4/dsdb/kcc/kcc_periodic.c:767(samba_kcc_done)
  ../../source4/dsdb/kcc/kcc_periodic.c:767: Failed samba_kcc - NT_STATUS_ACCESS_DENIED
[2020/06/25 01:38:45.400175,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc: Traceback (most recent call last):
[2020/06/25 01:38:45.400614,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/sbin/samba_kcc", line 47, in <module>
[2020/06/25 01:38:45.400764,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.kcc.graph_utils import verify_and_dot, list_verify_tests
[2020/06/25 01:38:45.400829,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/kcc/__init__.py", line 27, in <module>
[2020/06/25 01:38:45.400936,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba import ldb, dsdb, drs_utils
[2020/06/25 01:38:45.401000,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/drs_utils.py", line 20, in <module>
[2020/06/25 01:38:45.401154,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.dcerpc import drsuapi, misc, drsblobs
[2020/06/25 01:38:45.401215,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/dcerpc/__init__.py", line 18, in <module>
[2020/06/25 01:38:45.401274,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.dcerpc.base import *
[2020/06/25 01:38:45.401336,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc: ImportError: libsamba-python.cpython-38-aarch64-lin5x-gnu.so.0: cannot open shared object file: No such file or directory
[2020/06/25 01:38:45.482100,  0] ../../source4/dsdb/kcc/kcc_periodic.c:767(samba_kcc_done)
  ../../source4/dsdb/kcc/kcc_periodic.c:767: Failed samba_kcc - NT_STATUS_ACCESS_DENIED
[2020/06/25 01:41:41.796551,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_spnupdate: Traceback (most recent call last):
[2020/06/25 01:41:41.797043,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_spnupdate:   File "/usr/sbin/samba_spnupdate", line 42, in <module>
[2020/06/25 01:41:41.797267,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_spnupdate:     from samba.samdb import SamDB
[2020/06/25 01:41:41.797346,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_spnupdate:   File "/usr/lib/python3/dist-packages/samba/samdb.py", line 33, in <module>
[2020/06/25 01:41:41.797488,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_spnupdate:     from samba.dcerpc import drsblobs, misc
[2020/06/25 01:41:41.797554,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_spnupdate:   File "/usr/lib/python3/dist-packages/samba/dcerpc/__init__.py", line 18, in <module>
[2020/06/25 01:41:41.797633,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_spnupdate:     from samba.dcerpc.base import *
[2020/06/25 01:41:41.797695,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_spnupdate: ImportError: libsamba-python.cpython-38-aarch64-lin5x-gnu.so.0: cannot open shared object file: No such file or directory
[2020/06/25 01:41:41.821733,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_dnsupdate: Traceback (most recent call last):
[2020/06/25 01:41:41.822109,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_dnsupdate:   File "/usr/sbin/samba_dnsupdate", line 47, in <module>
[2020/06/25 01:41:41.822320,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_dnsupdate:     from samba.samdb import SamDB
[2020/06/25 01:41:41.822477,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_dnsupdate:   File "/usr/lib/python3/dist-packages/samba/samdb.py", line 33, in <module>
[2020/06/25 01:41:41.822587,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_dnsupdate:     from samba.dcerpc import drsblobs, misc
[2020/06/25 01:41:41.822649,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_dnsupdate:   File "/usr/lib/python3/dist-packages/samba/dcerpc/__init__.py", line 18, in <module>
[2020/06/25 01:41:41.822716,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_dnsupdate:     from samba.dcerpc.base import *
[2020/06/25 01:41:41.822778,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_dnsupdate: ImportError: libsamba-python.cpython-38-aarch64-lin5x-gnu.so.0: cannot open shared object file: No such file or directory
[2020/06/25 01:41:41.833070,  0] ../../source4/dsdb/dns/dns_update.c:353(dnsupdate_spnupdate_done)
  ../../source4/dsdb/dns/dns_update.c:353: Failed SPN update - with error code 11
[2020/06/25 01:41:41.902731,  0] ../../source4/dsdb/dns/dns_update.c:330(dnsupdate_nameupdate_done)
  dnsupdate_nameupdate_done: Failed DNS update with exit code 1
...
[2020/06/25 01:48:45.602362,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc: Traceback (most recent call last):
[2020/06/25 01:48:45.602820,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/sbin/samba_kcc", line 47, in <module>
[2020/06/25 01:48:45.602974,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.kcc.graph_utils import verify_and_dot, list_verify_tests
[2020/06/25 01:48:45.603040,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/kcc/__init__.py", line 27, in <module>
[2020/06/25 01:48:45.603140,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba import ldb, dsdb, drs_utils
[2020/06/25 01:48:45.603201,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/drs_utils.py", line 20, in <module>
[2020/06/25 01:48:45.603306,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.dcerpc import drsuapi, misc, drsblobs
[2020/06/25 01:48:45.603366,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:   File "/usr/lib/python3/dist-packages/samba/dcerpc/__init__.py", line 18, in <module>
[2020/06/25 01:48:45.603426,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc:     from samba.dcerpc.base import *
[2020/06/25 01:48:45.603487,  0] ../../lib/util/util_runcmd.c:352(samba_runcmd_io_handler)
  /usr/sbin/samba_kcc: ImportError: libsamba-python.cpython-38-aarch64-lin5x-gnu.so.0: cannot open shared object file: No such file or directory
[2020/06/25 01:48:45.684318,  0] ../../source4/dsdb/kcc/kcc_periodic.c:767(samba_kcc_done)
  ../../source4/dsdb/kcc/kcc_periodic.c:767: Failed samba_kcc - NT_STATUS_ACCESS_DENIED
[2020/06/25 01:51:05.952606,  0] ../../file_server/file_server.c:45(file_server_smbd_done)
  file_server smbd daemon died with exit status 6
[2020/06/25 01:51:05.953545,  0] ../../source4/smbd/service_task.c:36(task_server_terminate)
  task_server_terminate: task_server_terminate: [smbd child process exited]
[2020/06/25 01:51:05.966865,  0] ../../source4/smbd/server.c:370(samba_terminate)
  samba_terminate: samba_terminate of samba 1236: smbd child process exited
[2020/06/25 01:51:06.081723,  0] ../../lib/util/fault.c:79(fault_report)

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1885086

Title:
  samba-ad-dc dns update crash

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