Description of problem:
nss_ldap-253-47.el5
glibc-2.5-72

$ useradd SudoUser1; echo $?; useradd sudouser; echo $?
Segmentation fault
139
Segmentation fault
139
i:x86_64|m:x86_64 root@sgi-xe310-03 [bz632235-sudo-using-active-directory-gives-a-cache-error]# cat /etc/nsswitch.conf 
passwd:     files [!NOTFOUND=return] ldap
shadow:     files [!NOTFOUND=return] ldap
group:      files [!NOTFOUND=return] ldap
hosts:      files dns
bootparams: nisplus [NOTFOUND=return] files
ethers:     files
netmasks:   files
networks:   files
protocols:  files
rpc:        files
services:   files
netgroup:   nisplus
publickey:  nisplus
automount:  files nisplus
aliases:    files nisplus


i:x86_64|m:x86_64 root@sgi-xe310-03 [bz632235-sudo-using-active-directory-gives-a-cache-error]# gdb --args useradd SudoUser1
GNU gdb (GDB) Red Hat Enterprise Linux (7.0.1-42.el5)
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/sbin/useradd...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/sbin/useradd SudoUser1
warning: no loadable sections found in added symbol-file system-supplied DSO at 0x2aaaaaaab000

Program received signal SIGSEGV, Segmentation fault.
0x00002aaaae388e2c in _nss_ldap_db_get () from /lib64/libnss_ldap.so.2

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. See the description part

  
Actual results:
Segfault.

Expected results:
No segfault.

Additional info:
As you can see in valgrind log it seems there is some unfreed space.