[Bug 970679] Re: winbind coredumps when encountering a group with over 1000 members

[roelof van der kleij]

I applied https://attachments.samba.org/attachment.cgi?id=7381  against
the samba 3.6.3-2ubuntu1 src deb and can confirm it does fix the
problem.

I did notice doing a wbinfo -u on our 50k+ users AD will crash winbind,
but that is a separate issue I believe.

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Title:
  winbind coredumps when encountering a group with over 1000 members

Status in Samba:
  Unknown
Status in “samba” package in Ubuntu:
  Triaged
Status in “samba” source package in Precise:
  Triaged
Status in “samba” source package in Quantal:
  Triaged

Bug description:
  Samba 3.6.3 precise

  winbind works as expected with groups with < 1000 members, core dumps
  when encountering groups with > 1000 members.

  e.g. getent group groupWithLessThan1000Members returns expected
  results

  getent group groupWithMoreThan1000Members hangs at CLI whilst winbind
  coredumps in the background and eventually returns nothing, however
  this can be found in syslog

  Apr  1 02:00:56 fs1 winbindd[1506]: [2012/04/01 02:00:56.252483,  0] ../lib/util/debug.c:413(talloc_log_fn)
  Apr  1 02:00:56 fs1 winbindd[1506]:   Bad talloc magic value - unknown value
  Apr  1 02:00:56 fs1 winbindd[1506]: [2012/04/01 02:00:56.255072,  0] lib/util.c:1117(smb_panic)
  Apr  1 02:00:56 fs1 winbindd[1506]:   PANIC (pid 1506): Bad talloc magic value - unknown value
  Apr  1 02:00:56 fs1 winbindd[1506]: [2012/04/01 02:00:56.282138,  0] lib/util.c:1221(log_stack_trace)
  Apr  1 02:00:56 fs1 winbindd[1506]:   BACKTRACE: 20 stack frames:
  Apr  1 02:00:56 fs1 winbindd[1506]:    #0 /usr/sbin/winbindd(log_stack_trace+0x1a) [0x7f4dab7704ca]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #1 /usr/sbin/winbindd(smb_panic+0x25) [0x7f4dab7705a5]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #2 /usr/lib/x86_64-linux-gnu/libtalloc.so.2(talloc_strdup+0x299) [0x7f4da95ab429]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #3 /usr/sbin/winbindd(+0x4edb5d) [0x7f4dabab9b5d]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #4 /usr/sbin/winbindd(dcerpc_lsa_lookup_sids3+0x2e) [0x7f4dababa24e]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #5 /usr/sbin/winbindd(winbindd_lookup_sids+0x116) [0x7f4dab6b7306]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #6 /usr/sbin/winbindd(+0xeefa2) [0x7f4dab6bafa2]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #7 /usr/sbin/winbindd(+0xd9be2) [0x7f4dab6a5be2]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #8 /usr/sbin/winbindd(_wbint_LookupGroupMembers+0x5e) [0x7f4dab6c497e]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #9 /usr/sbin/winbindd(+0x1029b4) [0x7f4dab6ce9b4]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #10 /usr/sbin/winbindd(winbindd_dual_ndrcmd+0xbc) [0x7f4dab6c3f6c]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #11 /usr/sbin/winbindd(+0xf6cb4) [0x7f4dab6c2cb4]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #12 /usr/sbin/winbindd(+0xf7765) [0x7f4dab6c3765]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #13 /usr/sbin/winbindd(tevent_common_loop_immediate+0xe2) [0x7f4dab781e92]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #14 /usr/sbin/winbindd(run_events_poll+0x48) [0x7f4dab77ff88]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #15 /usr/sbin/winbindd(+0x1b43a6) [0x7f4dab7803a6]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #16 /usr/sbin/winbindd(_tevent_loop_once+0x90) [0x7f4dab780fb0]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #17 /usr/sbin/winbindd(main+0x78b) [0x7f4dab699a3b]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #18 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f4da8bd376d]
  Apr  1 02:00:56 fs1 winbindd[1506]:    #19 /usr/sbin/winbindd(+0xcde91) [0x7f4dab699e91]
  Apr  1 02:00:56 fs1 winbindd[1506]: [2012/04/01 02:00:56.282756,  0] lib/fault.c:372(dump_core)
  Apr  1 02:00:56 fs1 winbindd[1506]:   dumping core in /var/log/samba/cores/winbindd
  Apr  1 02:00:56 fs1 winbindd[1506]: 
  Apr  1 02:03:57 fs1 winbindd[1163]: [2012/04/01 02:03:57.387585,  0] winbindd/winbindd_util.c:330(trustdom_list_done)
  Apr  1 02:03:57 fs1 winbindd[1163]:   Got invalid trustdom response

  
  Fix submitted here: https://bugzilla.samba.org/show_bug.cgi?id=8807 ubuntu version probbably just needs patching.

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