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Re: (ITS#4964) consumer with slapo-chain segfaults when using ldappasswd

To: openldap-its@OpenLDAP.org
Subject: Re: (ITS#4964) consumer with slapo-chain segfaults when using ldappasswd
From: krause@biochem.mpg.de
Date: Tue, 22 May 2007 16:58:44 GMT
I have downloaded the cvs version (2007-05-21) and built it, but get,
as it seems related to something else, a segfault. i reproduced this
trice.
what i did: (just to be sure i did not make a fatal mistake)

* fetched cvs
* ran configure with the following command line:
env CPPFLAGS=-I/usr/include/db42  ./configure --enable-wrappers
--enable-aclgroups --enable-spasswd --enable-modules --enable-shared
--enable-dynamic --with-tls --with-cyrus-sasl --enable-crypt
--enable-aci  --enable-bdb  --enable-hdb --enable-ldbm
--enable-rewrite --enable-ldap=yes  --enable-meta=mod
--enable-monitor=yes  --enable-perl=mod --enable-slp
--enable-overlays=yes --enable-lmpasswd --with-yielding-select
--enable-debug=yes

i had to install the development package for BDB 4.2 (although the rpm
from opensuse has it built with BDB 4.3, also i could not reuse the
existing ldap db)

* then make depend; make; make test
    -> all tests succeded (as far is i can tell)

* gdb openldap/servers/slapd/.libs/slapd
    run -h ldap:/// ldaps:/// -g ldap -u ldap -d 65535

as the "local" ldap db on this consumer is empty the replication
starts (reproduced after segfault and removal of the direcory
contents):

[lot of debugging output, and finally:]
entry_decode: "cn=Neurobiologie EDV,ou=IT  
Contacts,ou=ACL,dc=biochem,dc=mpg,dc=de"
<= entry_decode(cn=Neurobiologie EDV,ou=IT  
Contacts,ou=ACL,dc=biochem,dc=mpg,dc=de)
=> test_filter
     PRESENT
=> access_allowed: search access to "cn=Neurobiologie EDV,ou=IT  
Contacts,ou=ACL,dc=biochem,dc=mpg,dc=de" "objectClass" requested
<= root access granted
=> access_allowed: search access granted by manage(=mwrscxd)
<= test_filter 6
nonpresent_callback: rid=013 got UUID  
1f1b0732-9823-102b-8c9e-b3c3d9320a55, dn cn=Neurobiologie EDV,ou=IT  
Contacts,ou=ACL,dc=biochem,dc=mpg,dc=de
send_ldap_result: conn=-1 op=0 p=0
send_ldap_result: err=0 matched="" text=""
bdb_modify: dc=biochem,dc=mpg,dc=de
bdb_dn2entry("dc=biochem,dc=mpg,dc=de")
entry_decode: "dc=biochem,dc=mpg,dc=de"
<= entry_decode(dc=biochem,dc=mpg,dc=de)
bdb_modify_internal: 0x00000001: dc=biochem,dc=mpg,dc=de
<= acl_access_allowed: granted to database root
bdb_modify_internal: add contextCSN
=> entry_encode(0x00000001): dc=biochem,dc=mpg,dc=de
bdb_modify: updated id=00000001 dn="dc=biochem,dc=mpg,dc=de"
send_ldap_result: conn=-1 op=0 p=0
send_ldap_result: err=0 matched="" text=""

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1225942112 (LWP 19016)]
slap_dup_sync_cookie (dst=0x8283400, src=0xb6ed8cf0) at ldapsync.c:327
327                             new->sids[i] = src->sids[i];

the backtrace says:
(gdb) bt
#0  slap_dup_sync_cookie (dst=0x8283400, src=0xb6ed8cf0) at ldapsync.c:327
#1  0x080c83fd in syncrepl_updateCookie (si=0x8283310, op=0xb6ed8e7c,
     pdn=<value optimized out>, syncCookie=0xb6ed8cf0) at syncrepl.c:2615
#2  0x080ced95 in do_syncrep2 (op=0xb6ed8e7c, si=0x8283310) at syncrepl.c:1016
#3  0x080cffbc in do_syncrepl (ctx=0xb6ed92d8, arg=0x8282d60)
     at syncrepl.c:1161
#4  0x08074c0a in connection_read_thread (ctx=0xb6ed92d8, argv=0x11)
     at connection.c:1273
#5  0xb7f5f7f2 in ldap_int_thread_pool_wrapper (xpool=0x821ff08) at  
tpool.c:725
#6  0xb7c4134b in start_thread () from /lib/libpthread.so.0
#7  0xb7bd965e in clone () from /lib/libc.so.6
(gdb)


after this it also segfaults if started again :
[lot of debugging output, and finally:]
do_syncrep2: rid=013 LDAP_RES_INTERMEDIATE - REFRESH_PRESENT
ber_scanf fmt (t{) ber:
ber_dump: buf=0x08312178 ptr=0x08312178 end=0x083121a8 len=48
     0000:  a2 2e 04 2c 63 73 6e 3d  32 30 30 37 30 35 31 36   ...,csn=20070516
     0010:  31 38 30 30 34 38 5a 23  30 30 30 30 36 35 23 30   180048Z#000065#0
     0020:  30 23 30 30 30 30 30 30  2c 72 69 64 3d 30 31 33   0#000000,rid=013
ber_scanf fmt (m) ber:
ber_dump: buf=0x08312178 ptr=0x0831217a end=0x083121a8 len=46
     0000:  04 2c 63 73 6e 3d 32 30  30 37 30 35 31 36 31 38   .,csn=2007051618
     0010:  30 30 34 38 5a 23 30 30  30 30 36 35 23 30 30 23   0048Z#000065#00#
     0020:  30 30 30 30 30 30 2c 72  69 64 3d 30 31 33         000000,rid=013
ber_scanf fmt (}) ber:
ber_dump: buf=0x08312178 ptr=0x083121a8 end=0x083121a8 len=0


Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1235027040 (LWP 23928)]
compare_csns (sc1=0xb662ecd0, sc2=0xb662ecf0, which=0xb662ede4)
       at syncrepl.c:647
647                             if ( sc1->sids[i] != sc2->sids[j] )

backtrace says this time:
(gdb) bt
#0  compare_csns (sc1=0xb662ecd0, sc2=0xb662ecf0, which=0xb662ede4)
       at syncrepl.c:647
#1  0x080ced4c in do_syncrep2 (op=0xb662ee7c, si=0x82832b0) at syncrepl.c:1005
#2  0x080cffbc in do_syncrepl (ctx=0xb662f2d8, arg=0x8282d00)
       at syncrepl.c:1161
#3  0x08074c0a in connection_read_thread (ctx=0xb662f2d8, argv=0x11)
       at connection.c:1273
#4  0xb7eb67f2 in ldap_int_thread_pool_wrapper (xpool=0x821ff08) at
tpool.c:725
#5  0xb7b9834b in start_thread () from /lib/libpthread.so.0
#6  0xb7b3065e in clone () from /lib/libc.so.6


* the configuration on the provider and the consumer were left  
untouched (except path corrections) to the until now running without  
errors rpm-version 2.3.34, the old rpms have been removed (using rpm -e)

did i make something wrong or did i hit another bug??

regards
     markus

Zitat von Pierangelo Masarati <ando@sys-net.it>:
> This is now completely fixed in HEAD; I need to check any issue related
> to backporting to re23, for quick release.  Please test.  Thanks for
> reporting, p.
>
>
>
> Ing. Pierangelo Masarati
> OpenLDAP Core Team
>
> SysNet s.r.l.
> via Dossi, 8 - 27100 Pavia - ITALIA
> http://www.sys-net.it
> ---------------------------------------
> Office:  +39 02 23998309
> Mobile:  +39 333 4963172
> Email:   pierangelo.masarati@sys-net.it
> ---------------------------------------
>
>



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| Markus Krause, Mogli-Soft                                       |
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