RHEL7 httpd with mod_ldap loops in find_block_of_size()

Issue

• RHEL7 httpd with mod_ldap loops in find_block_of_size()

httpd-debuginfo-2.4.6-45.el7.x86_64:

# gdb /usr/sbin/httpd core.#
...
(gdb) bt
#0  0x00007f0ae20136ef in find_block_of_size (size=size@entry=48, rmm=0x7f0ae3576038) at misc/apr_rmm.c:106
#1  0x00007f0ae2013e88 in apr_rmm_calloc (rmm=0x7f0ae3576038, reqsize=<optimized out>) at misc/apr_rmm.c:342
#2  0x00007f0ad37203fa in util_ald_alloc (cache=0x7f0ac20a45a0, size=<optimized out>) at util_ldap_cache_mgr.c:105
#3  0x00007f0ad3720bcf in util_ald_cache_insert (cache=0x7f0ac20a45a0, payload=payload@entry=0x7ffe32062f80) at util_ldap_cache_mgr.c:470
#4  0x00007f0ad371e1da in uldap_cache_checkuserid (r=<optimized out>, ldc=0x7f0ae4230a10, url=<optimized out>, basedn=<optimized out>, scope=<optimized out>, 
    attrs=0x7f0ae38fc2b0, 
    filter=0x7ffe320630c0 "(&(&(objectClass=ldapPerson)(|(memberof=CN=53RDVEND0001R,ou=Groups,ou=EX00A0,ou=Organizations,dc=extra,dc=local)(memberof=CN=53RDVEND0001W,ou=Groups,ou=EX00A0,ou=Organizations,dc=extra,dc=local)))(sAM"..., bindpw=0x7f0ae3fb22ef "murata45", binddn=0x7ffe32063058, retvals=0x7f0ae3fb2320) at util_ldap.c:1863
#5  0x00007f0ad1e6b46d in authn_ldap_check_password (r=0x7f0ae3fb5be0, user=0x7f0ae3fb2300 "murata.daisuke", password=0x7f0ae3fb22ef "murata45")
    at mod_authnz_ldap.c:528
#6  0x00007f0adffb2726 in authenticate_basic_user (r=0x7f0ae3fb5be0) at mod_auth_basic.c:324
#7  0x00007f0ae29017a0 in ap_run_check_user_id (r=r@entry=0x7f0ae3fb5be0) at request.c:81
#8  0x00007f0ae29047b2 in ap_process_request_internal (r=r@entry=0x7f0ae3fb5be0) at request.c:273
#9  0x00007f0ae291fbb8 in ap_process_async_request (r=r@entry=0x7f0ae3fb5be0) at http_request.c:315
#10 0x00007f0ae291fea4 in ap_process_request (r=r@entry=0x7f0ae3fb5be0) at http_request.c:363
#11 0x00007f0ae291c7f2 in ap_process_http_sync_connection (c=0x7f0ae3e5f210) at http_core.c:190
#12 ap_process_http_connection (c=0x7f0ae3e5f210) at http_core.c:231
#13 0x00007f0ae2914890 in ap_run_process_connection (c=c@entry=0x7f0ae3e5f210) at connection.c:41
#14 0x00007f0ae2914c78 in ap_process_connection (c=c@entry=0x7f0ae3e5f210, csd=<optimized out>) at connection.c:202
#15 0x00007f0ad850b80f in child_main (child_num_arg=child_num_arg@entry=5) at prefork.c:707
#16 0x00007f0ad850ba55 in make_child (s=0x7f0ae34f33a0, slot=5) at prefork.c:810
#17 0x00007f0ad850c6ee in perform_idle_server_maintenance (p=<optimized out>) at prefork.c:912
#18 prefork_run (_pconf=<optimized out>, plog=<optimized out>, s=<optimized out>) at prefork.c:1100
#19 0x00007f0ae28f15be in ap_run_mpm (pconf=pconf@entry=0x7f0ae34c2138, plog=0x7f0ae34ef358, s=0x7f0ae34f33a0) at mpm_common.c:96
#20 0x00007f0ae28eab46 in main (argc=2, argv=0x7ffe32065738) at main.c:777
(gdb)