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

[Seb Harrington]

Public bug reported:

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.

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New

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

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