When built against libldap from OpenLDAP 2.3 on x86_64, smbd segfaults when using pdb_ldap.

I found it easier to reproduce with pdbedit:

[root@build ~]# gdb pdbedit
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This GDB was configured as "x86_64-mandriva-linux-gnu"...Using host libthread_db library "/lib64/tls/libthread_db.so.1".

(gdb) run -L
Starting program: /usr/bin/pdbedit -L

Program received signal SIGSEGV, Segmentation fault.
ldap_count_values (vals=0x2ad0a3c0) at getvalues.c:153
153             for ( i = 0; vals[i] != NULL; i++ )
(gdb) bt
#0  ldap_count_values (vals=0x2ad0a3c0) at getvalues.c:153
#1  0x000000552ab3dc4d in smbldap_check_root_dse () from /usr/bin/pdbedit
#2  0x000000552ab3dd60 in smbldap_has_control () from /usr/bin/pdbedit
#3  0x000000552ab3c3d0 in smbldap_connect_system () from /usr/bin/pdbedit
#4  0x000000552ab3c64a in smbldap_open () from /usr/bin/pdbedit
#5  0x000000552ab3c841 in another_ldap_try () from /usr/bin/pdbedit
#6  0x000000552ab3cb9b in smbldap_search_ext () from /usr/bin/pdbedit
#7  0x000000552ab3cc23 in smbldap_search () from /usr/bin/pdbedit
#8  0x000000552ab3d4f9 in smbldap_search_suffix () from /usr/bin/pdbedit
#9  0x000000552ab3e3d6 in smbldap_search_domain_info () from /usr/bin/pdbedit
#10 0x000000552aaf3881 in pdb_init_ldapsam () from /usr/bin/pdbedit
#11 0x000000552aae4379 in make_pdb_methods_name () from /usr/bin/pdbedit
#12 0x000000552aae4911 in make_pdb_context_list () from /usr/bin/pdbedit
#13 0x000000552aae4bbf in pdb_get_static_context () from /usr/bin/pdbedit
#14 0x000000552aae5504 in initialize_password_db () from /usr/bin/pdbedit
#15 0x000000552aad0be7 in main () from /usr/bin/pdbedit


There are no problems under x86 (with exaclt the same versions), or with OpenLDAP 2.2 (on x86_64).

Samba 3.0.20b exhibits the same behaviour.

OpenLDAP developers don't think this is their bug.