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

[James Page]

** Description changed:

+ Impact:
+ winbind coredumps when encountering a group with more that 1000 members - this renders winbind unusable in deployments with > 1000 users.
+ 
+ Development Fix:
+ Cherry picked patch from upstream VCS - this fix should be included in 3.6.6.
+ 
+ Stable Fix:
+ 
+ Test Case:
+ TBC - may need to be smoke tested by users reporting this issue.
+ 
+ Regression Potential:
+ Minimal - patch has been committed upstream and should be released in Samba 3.6.6.
+ 
+ Original Bug Report:
+ 
  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 02:00:56 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.
+ Fix submitted here: https://bugzilla.samba.org/show_bug.cgi?id=8807
+ ubuntu version probbably just needs patching.

** Summary changed:

- winbind coredumps when encountering a group with over 1000 members
+ [SRU] winbind coredumps when encountering a group with over 1000 members

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https://bugs.launchpad.net/bugs/970679

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

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