[Bug 1778456] Re: Panic in gencache_stabilize

[RégisC]

I've also this in log.winbindd:

[2018/06/24 23:32:21.438678,  0] ../source3/winbindd/winbindd.c:243(winbindd_sig_term_handler)
  Got sig[15] terminate (is_parent=1)
[2018/06/25 06:33:59.854508,  0] ../source3/winbindd/winbindd_cache.c:3170(initialize_winbindd_cache)
  initialize_winbindd_cache: clearing cache and re-creating with version number 2
[2018/06/25 06:34:00.195147,  0] ../lib/util/become_daemon.c:124(daemon_ready)
  STATUS=daemon 'winbindd' finished starting up and ready to serve connections

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Title:
  Panic in gencache_stabilize

Status in samba package in Ubuntu:
  New

Bug description:
  I noticed some mail about samba panic today.

  ** Stacktrace **

  [Thread debugging using libthread_db enabled]
  Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
  0x00007f011c4d5687 in __GI___waitpid (pid=11376, stat_loc=stat_loc at entry=0x7ffecfd0772
  8, options=options at entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
  #0  0x00007f011c4d5687 in __GI___waitpid (pid=11376, stat_loc=stat_loc at entry=0x7ffecfd
  07728, options=options at entry=0) at ../sysdeps/unix/sysv/linux/waitpid.c:30
  #1  0x00007f011c440067 in do_system (line=<optimized out>) at ../sysdeps/posix/system.
  c:149
  #2  0x00007f011f9ffaf1 in smb_panic_s3 () from /usr/lib/x86_64-linux-gnu/libsmbconf.so
  .0
  #3  0x00007f0122b1c5af in smb_panic () from /usr/lib/x86_64-linux-gnu/libsamba-util.so
  .0
  #4  0x00007f0122b1c7c6 in ?? () from /usr/lib/x86_64-linux-gnu/libsamba-util.so.0
  #5  <signal handler called>
  #6  0x00007f01247f13fc in __pthread_mutex_unlock_full (mutex=0x7f0124afda78, decr=1) a
  t pthread_mutex_unlock.c:147
  #7  0x00007f011d286fd3 in ?? () from /usr/lib/x86_64-linux-gnu/libtdb.so.1
  #8  0x00007f011d2802e5 in ?? () from /usr/lib/x86_64-linux-gnu/libtdb.so.1
  #9  0x00007f011fa1973f in gencache_stabilize () from /usr/lib/x86_64-linux-gnu/libsmbc
  onf.so.0
  #10 0x000055a5e1195164 in ?? ()
  #11 0x000055a5e119524a in ?? ()
  #12 0x00007f011c7e9fe9 in tevent_common_check_signal () from /usr/lib/x86_64-linux-gnu
  /libtevent.so.0
  #13 0x00007f011c7ebe02 in ?? () from /usr/lib/x86_64-linux-gnu/libtevent.so.0
  #14 0x00007f011c7ea357 in ?? () from /usr/lib/x86_64-linux-gnu/libtevent.so.0
  #15 0x00007f011c7e67cd in _tevent_loop_once () from /usr/lib/x86_64-linux-gnu/libteven
  t.so.0
  #16 0x000055a5e11c0478 in ?? ()
  #17 0x000055a5e11c0985 in ?? ()
  #18 0x00007f011c7e71a4 in tevent_common_loop_immediate () from /usr/lib/x86_64-linux-g
  nu/libtevent.so.0
  #19 0x00007f011c7ebcfb in ?? () from /usr/lib/x86_64-linux-gnu/libtevent.so.0
  #20 0x00007f011c7ea357 in ?? () from /usr/lib/x86_64-linux-gnu/libtevent.so.0
  #21 0x00007f011c7e67cd in _tevent_loop_once () from /usr/lib/x86_64-linux-gnu/libteven
  t.so.0
  #22 0x000055a5e11922f0 in main ()

  
  ** lsb_release -a **

  LSB Version:	core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch
  Distributor ID:	Ubuntu
  Description:	Ubuntu 18.04 LTS
  Release:	18.04
  Codename:	bionic

  
  ** apt-cache policy samba **

  samba:
    Installé : 2:4.7.6+dfsg~ubuntu-0ubuntu2
    Candidat : 2:4.7.6+dfsg~ubuntu-0ubuntu2
   Table de version :
   *** 2:4.7.6+dfsg~ubuntu-0ubuntu2 500
          500 http://eu.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          100 /var/lib/dpkg/status

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