Re: openldap server + kse = bewm

Quoting Doug White <dwhite_at_gumbysoft.com>:

> hey folks,
>
> Looks like the OpenLDAP server, slapd, and KSE don't get along too well.

I may have missed the end of this thread, if I did I apologize.  Is the above
still an issue?

Thanks,

ed
>
> I can reliably segfault slapd by doing a few requests of it on a -CURRENT
> machine built this morning PST.  TLS seems to accelerate things, but it
> can be done without.  I have this backtrace, with a debugging libpthread,
> but I'm not sure how useful it is to you folks.
>
> This is 100% reproducible, although initially it was croaking in
> pthread_testcancel() instead of a kse function. This leads me to suspect
> strange mutex corruption, but I'd like someone who understands kse to at
> least spot-check.
>
> I thought at first it might be some strange interaction between berkeley
> db 4.2's special assembly mutexes and kse, but I rebuilt db42 with pthread
> mutexes and rebuilt openldap to use DB_PRIVATE so the db would mount, but
> no change in status.
>
> Here's the trace from gdb:
>
> #0  0x284374a7 in kse_release () at {standard input}:15
> #1  0x28431fed in kse_wait (kse=0x8102000, td_wait=0x0, sigseqno=0)
>     at /usr/src/lib/libpthread/thread/thr_kern.c:1816
> #2  0x28430485 in kse_sched_multi (kmbx=0x0)
>     at /usr/src/lib/libpthread/thread/thr_kern.c:1011
> #3  0x28434014 in _i386_enter_uts () at {standard input}:25
> #4  0x2842fa4e in _thr_sched_switch (curthread=0x8260000)
>     at /usr/src/lib/libpthread/thread/thr_kern.c:596
> #5  0x2842c905 in mutex_lock_common (curthread=0x8260000, m=0x810e304,
>     abstime=0x0) at /usr/src/lib/libpthread/thread/thr_mutex.c:555
> #6  0x2842d633 in __pthread_mutex_lock (m=0x810e304)
>     at /usr/src/lib/libpthread/thread/thr_mutex.c:796
> #7  0x2839634f in pthread_mutex_lock () from /lib/libc.so.5
> #8  0x281288b3 in ldap_pvt_thread_mutex_lock ()
>    from /usr/local/lib/libldap_r.so.202
> #9  0x28127b23 in ldap_pvt_thread_pool_submit ()
>    from /usr/local/lib/libldap_r.so.202
> #10 0x08059d23 in ldap_str2matchingrule ()
> #11 0x080599d5 in ldap_str2matchingrule ()
> #12 0x08059525 in ldap_str2matchingrule ()
> #13 0x08056fe5 in ldap_str2matchingrule ()
> #14 0x28425595 in thread_start (curthread=0x8260000,
>     start_routine=0x8055a4c <ldap_str2matchingrule+34120>, arg=0x0)
>     at /usr/src/lib/libpthread/thread/thr_create.c:353
> #15 0x283e4807 in _ctx_start () from /lib/libc.so.5
>
>
> --
> Doug White                    |  FreeBSD: The Power to Serve
> dwhite_at_gumbysoft.com          |  www.FreeBSD.org
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