[Bug 1410838] Re: Samba 'panic action' script internal error

Mon Feb 2 09:29:24 UTC 2015

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: samba (Ubuntu)
       Status: New => Confirmed

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Title:
  Samba 'panic action' script internal error

Status in samba package in Ubuntu:
  Confirmed

Bug description:
  Samba is intermittently throws a panic.   However user are still able
  to get to shares.

  Here is the email message received with the trace.

  The Samba 'panic action' script, /usr/share/samba/panic-action,
  was called for PID 23392 (/usr/sbin/smbd).

  This means there was a problem with the program, such as a segfault.
  Below is a backtrace for this process generated with gdb, which shows
  the state of the program at the time the error occurred.  The Samba log
  files may contain additional information about the problem.

  If the problem persists, you are encouraged to first install the
  samba-dbg package, which contains the debugging symbols for the Samba
  binaries.  Then submit the provided information as a bug report to
  Ubuntu by visiting this link:
  https://launchpad.net/ubuntu/+source/samba/+filebug

  [Thread debugging using libthread_db enabled]
  Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
  0x00007f6065aad5cc in __libc_waitpid (pid=27679, stat_loc=stat_loc at entry=0x7fff2c5ae6d0, options=options at entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:31
  #0  0x00007f6065aad5cc in __libc_waitpid (pid=27679, stat_loc=stat_loc at entry=0x7fff2c5ae6d0, options=options at entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:31
  #1  0x00007f6065a321d2 in do_system (line=line at entry=0x7f606986f800 "/usr/share/samba/panic-action 23392") at ../sysdeps/posix/system.c:148
  #2  0x00007f6065a3253a in __libc_system (line=line at entry=0x7f606986f800 "/usr/share/samba/panic-action 23392") at ../sysdeps/posix/system.c:184
  #3  0x00007f6068b17235 in system (line=line at entry=0x7f606986f800 "/usr/share/samba/panic-action 23392") at pt-system.c:28
  #4  0x00007f60673c7061 in smb_panic_s3 (why=<optimized out>) at ../source3/lib/util.c:798
  #5  0x00007f60688efc6f in smb_panic (why=why at entry=0x7f60688fbb3b "internal error") at ../lib/util/fault.c:159
  #6  0x00007f60688efe86 in fault_report (sig=<optimized out>) at ../lib/util/fault.c:77
  #7  sig_fault (sig=<optimized out>) at ../lib/util/fault.c:88
  #8  <signal handler called>
  #9  smbd_smb2_request_reply (req=0x7f60698527e0) at ../source3/smbd/smb2_server.c:2412
  #10 smbd_smb2_request_done_ex (req=req at entry=0x7f60698527e0, status=..., status at entry=..., body=..., dyn=dyn at entry=0x7f6069853fa0, location=location at entry=0x7f60686137b8 "../source3/smbd/smb2_server.c:2651") at ../source3/smbd/smb2_server.c:2584
  #11 0x00007f60684f11ae in smbd_smb2_request_error_ex (req=req at entry=0x7f60698527e0, status=status at entry=..., info=0x7f6069853fa0, info at entry=0x0, location=location at entry=0x7f606861c3d0 "../source3/smbd/smb2_notify.c:122") at ../source3/smbd/smb2_server.c:2651
  #12 0x00007f6068503480 in smbd_smb2_request_notify_done (subreq=0x0) at ../source3/smbd/smb2_notify.c:122
  #13 0x00007f6065db5e14 in tevent_common_loop_immediate () from /usr/lib/x86_64-linux-gnu/libtevent.so.0
  #14 0x00007f60673dcf7c in run_events_poll (ev=0x7f6069826380, pollrtn=0, pfds=0x0, num_pfds=0) at ../source3/lib/events.c:192
  #15 0x00007f60673dd264 in s3_event_loop_once (ev=0x7f6069826380, location=<optimized out>) at ../source3/lib/events.c:303
  #16 0x00007f6065db55ed in _tevent_loop_once () from /usr/lib/x86_64-linux-gnu/libtevent.so.0
  #17 0x00007f60684df59a in smbd_process (ev_ctx=0x7f6069826380, msg_ctx=<optimized out>, sock_fd=<optimized out>, interactive=<optimized out>) at ../source3/smbd/process.c:3626
  #18 0x00007f6068f53fa4 in smbd_accept_connection (ev=0x7f6069826380, fde=<optimized out>, flags=<optimized out>, private_data=<optimized out>) at ../source3/smbd/server.c:621
  #19 0x00007f60673dd0ac in run_events_poll (ev=0x7f6069826380, pollrtn=<optimized out>, pfds=0x7f606983be00, num_pfds=5) at ../source3/lib/events.c:257
  #20 0x00007f60673dd300 in s3_event_loop_once (ev=0x7f6069826380, location=<optimized out>) at ../source3/lib/events.c:326
  #21 0x00007f6065db55ed in _tevent_loop_once () from /usr/lib/x86_64-linux-gnu/libtevent.so.0
  #22 0x00007f6068f50b8b in smbd_parent_loop (parent=<optimized out>, ev_ctx=0x7f6069826380) at ../source3/smbd/server.c:943
  #23 main (argc=<optimized out>, argv=<optimized out>) at ../source3/smbd/server.c:1577
  A debugging session is active.

          Inferior 1 [process 23392] will be detached.

  Quit anyway? (y or n) [answered Y; input not from terminal]

  Here is the entries from the /var/log/samba/log.smbd from the time
  frame the email was sent:

  [2015/01/14 06:46:24.886499,  3] ../source3/smbd/server.c:447(remove_child_pid)
    ../source3/smbd/server.c:447 Unclean shutdown of pid 23392
  [2015/01/14 06:46:24.886590,  1] ../source3/smbd/server.c:456(remove_child_pid)
    Scheduled cleanup of brl and lock database after unclean shutdown
  [2015/01/14 06:46:40.414555,  2] ../source3/smbd/server.c:437(remove_child_pid)
    Could not find child 27700 -- ignoring

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