(ITS#5961) segfault if shm isn't available

[quanah@OpenLDAP.org]

Full_Name: Quanah Gibson-Mount
Version: RE24/HEAD
OS: Linux 2.6
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (75.111.29.239)


If OpenLDAP can't join the shm environment due to size issues, it segfaults:

#0  0x0000002a973fe32b in hdb_checkpoint (ctx=0x41000e20, arg=0x999820) at
config.c:192
192     config.c: No such file or directory.
        in config.c
(gdb) bt
#0  0x0000002a973fe32b in hdb_checkpoint (ctx=0x41000e20, arg=0x999820) at
config.c:192
#1  0x0000002a95702a60 in ldap_int_thread_pool_wrapper (xpool=0x916ee0) at
tpool.c:663
#2  0x0000003bfa006137 in start_thread () from /lib64/tls/libpthread.so.0
#3  0x0000003bf97c7533 in clone () from /lib64/tls/libc.so.6