[Samba] Irregular crash of samba 3.6.6 (debian wheezy)

[Ivan Novosad]

Hi,

 
We are using Samba3 as PDC. Sometimes (once a month, irregularly) Samba stop serving clients and log file looks like this:

…..

[2014/05/19 08:20:51.411247,  0] lib/fault.c:47(fault_report)

  ===============================================================

[2014/05/19 08:20:51.411576,  0] lib/fault.c:48(fault_report)

  INTERNAL ERROR: Signal 11 in pid 24222 (3.6.6)

  Please read the Trouble-Shooting section of the Samba3-HOWTO

[2014/05/19 08:20:51.412014,  0] lib/fault.c:50(fault_report)

 
  From: http://www.samba.org/samba/docs/Samba3-HOWTO.pdf

[2014/05/19 08:20:51.412345,  0] lib/fault.c:51(fault_report)

  ===============================================================

[2014/05/19 08:20:51.412567,  0] lib/util.c:1117(smb_panic)

  PANIC (pid 24222): internal error

[2014/05/19 08:20:51.423718,  0] lib/util.c:1221(log_stack_trace)

  BACKTRACE: 36 stack frames:

   #0 /usr/sbin/smbd(log_stack_trace+0x1a) [0x7f74be32c59a]

   #1 /usr/sbin/smbd(smb_panic+0x22) [0x7f74be32c672]

   #2 /usr/sbin/smbd(+0x422844) [0x7f74be31d844]

   #3 /lib/x86_64-linux-gnu/libc.so.6(+0x324f0) [0x7f74baca94f0]

   #4 /usr/sbin/smbd(tcopy_passwd+0x22) [0x7f74be305172]

   #5 /usr/sbin/smbd(pdb_copy_sam_account+0x76) [0x7f74be2ca0f6]

   #6 /usr/sbin/smbd(pdb_getsampwsid+0xa5) [0x7f74be2cd2d5]

   #7 /usr/sbin/smbd(_samr_OpenUser+0x161) [0x7f74be204691]

   #8 /usr/sbin/smbd(+0x319875) [0x7f74be214875]

   #9 /usr/sbin/smbd(+0x32a1c6) [0x7f74be2251c6]

   #10 /usr/sbin/smbd(dcerpc_binding_handle_raw_call_send+0x9e) [0x7f74be39e9ae]

   #11 /usr/sbin/smbd(dcerpc_binding_handle_call_send+0x258) [0x7f74be39f198]

   #12 /usr/sbin/smbd(dcerpc_binding_handle_call+0x77) [0x7f74be39f2c7]

   #13 /usr/sbin/smbd(dcerpc_samr_OpenUser_r+0x1d) [0x7f74be2983cd]

   #14 /usr/sbin/smbd(dcerpc_samr_OpenUser+0x1d) [0x7f74be2985fd]

   #15 /usr/sbin/smbd(+0x2bc58b) [0x7f74be1b758b]

   #16 /usr/sbin/smbd(_netr_ServerAuthenticate3+0x222) [0x7f74be1b8582]

   #17 /usr/sbin/smbd(+0x2c2a76) [0x7f74be1bda76]

   #18 /usr/sbin/smbd(+0x3260a5) [0x7f74be2210a5]

   #19 /usr/sbin/smbd(process_complete_pdu+0x89b) [0x7f74be22280b]

   #20 /usr/sbin/smbd(process_incoming_data+0x118) [0x7f74be223698]

   #21 /usr/sbin/smbd(np_write_send+0x150) [0x7f74be223d70]

   #22 /usr/sbin/smbd(reply_pipe_write_and_X+0x165) [0x7f74be0390e5]

   #23 /usr/sbin/smbd(reply_write_and_X+0x348) [0x7f74be042948]

   #24 /usr/sbin/smbd(+0x18a2dc) [0x7f74be0852dc]

   #25 /usr/sbin/smbd(+0x18a6e2) [0x7f74be0856e2]

   #26 /usr/sbin/smbd(+0x18ab21) [0x7f74be085b21]

   #27 /usr/sbin/smbd(run_events_poll+0x353) [0x7f74be33c073]

   #28 /usr/sbin/smbd(smbd_process+0x84a) [0x7f74be08728a]

   #29 /usr/sbin/smbd(+0x69f913) [0x7f74be59a913]

   #30 /usr/sbin/smbd(run_events_poll+0x353) [0x7f74be33c073]

   #31 /usr/sbin/smbd(+0x44120a) [0x7f74be33c20a]

   #32 /usr/sbin/smbd(_tevent_loop_once+0x90) [0x7f74be33cd70]

   #33 /usr/sbin/smbd(main+0xf30) [0x7f74be005890]

   #34 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f74bac95ead]

   #35 /usr/sbin/smbd(+0x10accd) [0x7f74be005ccd]

[2014/05/19 08:20:51.427991,  0] lib/fault.c:372(dump_core)

  dumping core in /data/pdc.vyroba/log/cores/smbd

[2014/05/19 08:20:51.459351,  0] rpc_server/netlogon/srv_netlog_nt.c:931(_netr_ServerAuthenticate3)

  _netr_ServerAuthenticate3: no challenge sent to client V4105-SENESI 

….

 
Details about instalations:

Debian wheezy (uname –a      Linux Xena 3.2.0-4-amd64 #1 SMP Debian 3.2.51-1 x86_64 GNU/Linux)

Samba is from official repository (samba 3.6.6-6-+deb7u2)

 
Where can I find more information, where the problem is?

What can I do to solve this problem?

 
Thanks.

 
Ivan Novosad