https://bugs.openldap.org/show_bug.cgi?id=9881
Issue ID: 9881
Summary: Ability to track last authentication for database
objects
Product: OpenLDAP
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: slapd
Assignee: bugs(a)openldap.org
Reporter: quanah(a)openldap.org
Target Milestone: ---
For simple binds, we have the ability to track the last success via the
lastbind functionality (pwdLastSuccess attribute). However this doesn't allow
one to see when an object that exists in a database last authenticated via
SASL.
It would be useful to add similar functionality for SASL binds.
This can be useful information that allows one to tell if an object is being
actively authenticated to (generally, users and system accounts, etc).
Obviously if something is directly mapped to an identity that doesn't exist in
the underlying DB, that cannot be tracked.
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https://bugs.openldap.org/show_bug.cgi?id=9829
Issue ID: 9829
Summary: set timeouts in remoteauth overlay
Product: OpenLDAP
Version: 2.5.11
Hardware: All
OS: All
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: overlays
Assignee: bugs(a)openldap.org
Reporter: david.coutadeur(a)gmail.com
Target Milestone: ---
Currently, it seems there is no way to configure timeouts in the remoteauth
overlay.
For example, if I define a remoteauth_mapping with a file containing a
list of hostnames, the first one is checked first.
After "remoteauth_retry_count" * "connect_timeout" seconds, (210s on my
system), remoteauth test the second server in the list.
In some circumstances, it could be nice to set the connect timeout lower
(or higher).
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https://bugs.openldap.org/show_bug.cgi?id=9652
Issue ID: 9652
Summary: Add "tee" capability to load balancer
Product: OpenLDAP
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: lloadd
Assignee: bugs(a)openldap.org
Reporter: mhardin(a)symas.com
Target Milestone: ---
This is a request for an enhancement that would add a "tee" or "fan-out"
capability to load balancer, where received operations are sent to two or more
destinations simultaneously.
The primary goal or the enhancement is to make it possible to keep multiple
independent and likely dissimilar directory systems in lock-step with each
other over hours, days, or possibly even weeks.
The enhancement would not necessarily need to include a mechanism for
converging the target systems should they become out of sync.
This is not intended to be a replication solution, rather it is viewed more as
a "copy" solution intended to be used for specific short-term tasks that need
multiple directory systems to be exactly synchronized but where replication is
not desirable or even possible.
At least two uses come to mind:
1. Test harnesses, evaluating side-by-side operation of separate directory
systems over time
2. Directory system transition validation harnesses
3. (maybe) Part of a test harness to record or replay LDAP workloads
* Other uses?
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https://bugs.openldap.org/show_bug.cgi?id=9303
Issue ID: 9303
Summary: Add support for WolfSSL as an alternative to OpenSSL
Product: OpenLDAP
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: libraries
Assignee: bugs(a)openldap.org
Reporter: quanah(a)openldap.org
Target Milestone: ---
For OpenLDAP 2.6, we should investigate adding support for WolfSSL as an
alternative to OpenSSL.
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https://bugs.openldap.org/show_bug.cgi?id=9220
Bug ID: 9220
Summary: Rewrite Bind and Exop result handling
Product: OpenLDAP
Version: 2.5
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: slapd
Assignee: bugs(a)openldap.org
Reporter: quanah(a)openldap.org
Target Milestone: ---
Bind and Exop result handling needs a rewrite so it is no longer a special case
for overlays.
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https://bugs.openldap.org/show_bug.cgi?id=9731
Issue ID: 9731
Summary: startup messages still go to syslog when logfile-only
is on
Product: OpenLDAP
Version: 2.6.0
Hardware: All
OS: All
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: slapd
Assignee: bugs(a)openldap.org
Reporter: quanah(a)openldap.org
Target Milestone: ---
When setting logfile-only on, slapd still logs its startup message to syslog:
Oct 29 21:07:47 u18test slapd[18534]: @(#) $OpenLDAP: slapd 2.6.0 (Oct 29 2021
05:12:17) $#012#011openldap
This is useful information to have consolidated into the specified logfile.
Note that:
617c62a3.16f03fdb 0x7f9325ed67c0 slapd starting
does make it to the logfile. However, it would be useful to have the build
date and version in the specified logfile.
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https://bugs.openldap.org/show_bug.cgi?id=9726
Issue ID: 9726
Summary: Admin guide and man pages need better documentation on
disabling syslog
Product: OpenLDAP
Version: 2.6.0
Hardware: All
OS: All
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: documentation
Assignee: bugs(a)openldap.org
Reporter: quanah(a)openldap.org
Target Milestone: ---
2.6.0 added the new feature allowing using a logfile for all debug/loglevel
messages and bypassing syslog entirely. However, there is no documentation on
the new settings or examples of how to do this in the admin guide, and the man
page sections on the new parameters for the logfile side do not note at
when/how they enable bypassing syslog.
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https://bugs.openldap.org/show_bug.cgi?id=9564
Issue ID: 9564
Summary: Race condition with freeing the spilled pages from
transaction
Product: LMDB
Version: 0.9.29
Hardware: Other
OS: Mac OS
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: liblmdb
Assignee: bugs(a)openldap.org
Reporter: kriszyp(a)gmail.com
Target Milestone: ---
Created attachment 825
--> https://bugs.openldap.org/attachment.cgi?id=825&action=edit
Free the spilled pages and dirty overflows before unlocking the write mutex
The spilled pages (a transaction's mt_spill_pgs) is freed *after* a write
transaction's mutex is unlocked (in mdb.master3). This can result in a race
condition where a second transaction can start and subsequently assign a new
mt_spill_pgs list to the transaction structure that it reuses. If this occurs
after the first transaction unlocks the mutex, but before it performs the free
operation on mt_spill_pgs, then the first transaction will end up calling a
free on the same spilled page list as the second transaction, resulting in a
double free (and crash).
It would seem to be an extremely unlikely scenario to actually happen, since
the free call is literally the next operation after the mutex is unlocked, and
the second transaction would need to make it all the way to the point of saving
the freelist before a page spill list is likely to be allocated. Consequently,
this probably has rarely happened. However, one of our users (see
https://github.com/DoctorEvidence/lmdb-store/issues/48 for the discussion) has
noticed this occurring, and it seems that it may be particularly likely to
happen on MacOS on the new M1 silicon. Perhaps there is some peculiarity to how
the threads are more likely to yield execution after a mutex unlock, I am not
sure. I was able to reproduce the issue by intentionally manipulating the
timing (sleeping before the free) to verify that the race condition is
technically feasible, and apparently this can happen "in the wild" on MacOS, at
least with an M1.
It is also worth noting that this is due to (or a regression from) the fix for
ITS#9155
(https://github.com/LMDB/lmdb/commit/cb256f409bb53efeda4ac69ee8165a0b4fc1a277)
where the free call was moved outside the conditional (for having a parent)
that had previously never been executed after the mutex is unlocked, but now is
called after the unlock.
Anyway, the solution is relatively simple, the free call simply has to be moved
above the unlock. In my patch, I also moved the free call for mt_dirty_ovs. I
am not sure what OVERFLOW_NOTYET/mt_dirty_ovs is for, but presumably it should
be handled the same. This could alternately be solved by saving the reference
to these lists before unlocking, and freeing after unlocking, which would
slightly decrease the amount of processing within the mutex guarded code. Let
me know if you prefer a patch that does that.
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https://bugs.openldap.org/show_bug.cgi?id=10389
Issue ID: 10389
Summary: mdb_opinfo_get: Assertion `!rc' failed. And data got
lost.
Product: OpenLDAP
Version: 2.6.9
Hardware: x86_64
OS: Linux
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: backends
Assignee: bugs(a)openldap.org
Reporter: 3049720393(a)qq.com
Target Milestone: ---
Hi All,
Don't know whether this problem is related to this bug or not, but want to
share it here as we still do not know the reason ;)
We're using version 2.6.9 now and started up by docker container. It works very
well when installing and starting it on a server instance.
But recently, we try to create it on Azure Container Apps service (which is a
service supporting to start docker containers), but found out that when two
openldap containers(openldap processes) run at the same time with same data
volume mounted, well, one is normally started, and another one is looping to
try to start but always failed.
The failed one shows errors:
```
mdb_db_open: database "dc=xxx,dc=exmple,dc=com" cannot be opened: Resource
temporarily unavailable (11). Restore from backup!
backend_startup_one (type=mdb, suffix="dc=xxx,dc=exmple,dc=com"): bi_db_open
failed! (11)
```
I think this is OK, because the started one is occupying the resources. And the
started up one is working well for some time, BUT suddenly at some point, it
went down to exit with the following error messages:
```
slapd: id2entry.c:828: mdb_opinfo_get: Assertion `!rc' failed.
/usr/local/bin/entrypoint.sh: line 160: 50 Aborted (core
dumped) slapd -d 32768 -u openldap -g openldap -F /etc/ldap/slapd.d
```
And as the previous normal one is exit, the other one can start up normally. So
we bash into it and ran `ldapsearch` command and found out that some of the
people entries were gone!!! But until now we still do not know the reason...
try to get some help here ;) thanks.
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https://bugs.openldap.org/show_bug.cgi?id=10373
Issue ID: 10373
Summary: pcache SEGV with pcacheTemplate ttr
Product: OpenLDAP
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: overlays
Assignee: bugs(a)openldap.org
Reporter: bertrand(a)jacquin.bzh
Target Milestone: ---
Hi,
I am currently setting up OpenLDAP with pcache to circumvent aggressive LDAP
queries from an application and thus reduce load to the SQL database used in
the backend through back-sql.so.
The setup is incomplete and likely not currently implemented properly, please
don't pay too much attention in configuration details from below, however I'm
noticing SEGV when pcacheTemplate are configured with ttr:
refresh_purge() attempts to dereference NULL pointer *a, leading to the SEGV:
```
$ gdb --args /usr/lib64/openldap/slapd -u ldap -h "ldapi:/// ldap:///
ldaps:///" -f /etc/openldap/slapd.conf -d stats -d pcache
688224ea.1e5f48d7 0x7fffedffb6c0 conn=1020 op=2 SEARCH RESULT tag=101 err=0
qtime=0.000166 etime=0.012879 nentries=0 text=
688224ea.1e633093 0x7fffedffb6c0 conn=1020 op=3 SRCH
base="ou=<redacted>,dc=<redacted>,dc=<redacted>" scope=2 deref=0
filter="(&(objectClass=inetOrgPerson)(&(jpegPhoto=*)(|(mail=<redacted>))))"
688224ea.1e64fd20 0x7fffedffb6c0 conn=1020 op=3 SRCH attr=dn
688224ea.1e65fb45 0x7fffedffb6c0 query template of incoming query =
(&(objectClass=)(&(jpegPhoto=*)(|(mail=))))
688224ea.1e660563 0x7fffedffb6c0 Entering QC, querystr =
(&(objectClass=inetOrgPerson)(&(jpegPhoto=*)(|(mail=<redacted>))))
688224ea.1e660de7 0x7fffedffb6c0 Lock QC index = 0x555555828190
688224ea.1e6616cf 0x7fffedffb6c0 Not answerable: Unlock QC index=0x555555828190
688224ea.1e66209d 0x7fffedffb6c0 QUERY NOT ANSWERABLE
688224ea.1e6627c3 0x7fffedffb6c0 QUERY CACHEABLE
688224ea.1ed69d89 0x7fffedffb6c0 conn=1020 op=3 SEARCH RESULT tag=101 err=32
qtime=0.000009 etime=0.007587 nentries=0 text=
688224ea.1ef64669 0x7ffff4dfe6c0 conn=1020 op=4 UNBIND
688224ea.1efab72d 0x7fffedffb6c0 conn=1020 fd=30 closed
Thread 7 "slapd" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffee7fc6c0 (LWP 136445)]
refresh_purge (op=0x7fffee7fb610, rs=0x7fffee7fb290) at pcache.c:3392
3392 dnl->delete = ( a->a_numvals == 1 );
(gdb) bt
#0 refresh_purge (op=0x7fffee7fb610, rs=0x7fffee7fb290) at pcache.c:3392
#1 refresh_purge (op=0x7fffee7fb610, rs=0x7fffee7fb290) at pcache.c:3367
#2 0x00005555555a6098 in slap_response_play (op=op@entry=0x7fffee7fb610,
rs=rs@entry=0x7fffee7fb290) at result.c:573
#3 0x00005555555a7ddd in slap_send_search_entry (op=0x7fffee7fb610,
rs=0x7fffee7fb290) at result.c:1078
#4 0x000055555562e007 in mdb_search (op=<optimized out>, rs=<optimized out>)
at search.c:1110
#5 0x00007ffff73a6509 in refresh_query (op=0x7fffee7fb610,
query=0x7fffd8131830, on=0x55555577c350) at pcache.c:3464
#6 consistency_check (ctx=<optimized out>, arg=0x5555559429a0) at
pcache.c:3644
#7 0x00007ffff7f9e09d in ldap_int_thread_pool_wrapper (xpool=0x5555557aed80)
at tpool.c:1059
#8 0x00007ffff7d3b86b in ?? () from /usr/lib64/libc.so.6
#9 0x00007ffff7dbc858 in ?? () from /usr/lib64/libc.so.6
(gdb) fr 0
#0 refresh_purge (op=0x7fffee7fb610, rs=0x7fffee7fb290) at pcache.c:3392
3392 dnl->delete = ( a->a_numvals == 1 );
(gdb) p *dnl
$17 = {
next = 0x0,
dn = {
bv_len = 40,
bv_val = 0x7fffe403cb70
"uid=john,ou=<redacted>,dc=<redacted>,dc=<redacted>"
},
delete = 80 'P'
}
(gdb) p a
$10 = (Attribute *) 0x0
(gdb) p ad_queryId
$14 = (AttributeDescription *) 0x555555819580
(gdb) p *rs
$11 = {
sr_type = REP_SEARCH,
sr_tag = 0,
sr_msgid = 0,
sr_err = 0,
sr_matched = 0x0,
sr_text = 0x0,
sr_ref = 0x0,
sr_ctrls = 0x0,
sr_un = {
sru_search = {
r_entry = 0x7fffe403c5a0,
r_attr_flags = 17,
r_operational_attrs = 0x0,
r_attrs = 0x7fffee7fb320,
r_nentries = 0,
r_v2ref = 0x0
},
sru_sasl = {
r_sasldata = 0x7fffe403c5a0
},
sru_extended = {
r_rspoid = 0x7fffe403c5a0 "!",
r_rspdata = 0x11
}
},
sr_flags = 0
}
(gdb) p *rs->sr_entry
$12 = {
e_id = 33,
e_name = {
bv_len = 40,
bv_val = 0x7fffe403cae0
"uid=john,ou=<redacted>,dc=<redacted>,dc=<redacted>"
},
e_nname = {
bv_len = 40,
bv_val = 0x7fffe403cb18
"uid=john,ou=<redacted>,dc=<redacted>,dc=<redacted>"
},
e_attrs = 0x7fffe403c5f0,
e_ocflags = 256,
e_bv = {
bv_len = 0,
bv_val = 0x0
},
e_private = 0x7fffe403c5a0
}
(gdb) p *rs->sr_entry->e_attrs
$13 = {
a_desc = 0x555555781be0,
a_vals = 0x7fffe403c7f8,
a_nvals = 0x7fffe403c7f8,
a_numvals = 1,
a_flags = 12,
a_next = 0x7fffe403c618
}
```
Looking further I can see that attr_find() can return NULL, however NULL are
not verified in refresh_purge() after call to attr_find().
Note that I am using 2.6.8 that includes all the changes from ITS#9966 and I
can't find any noticeable changes on that area between 2.6.8. and latest 2.6.9.
OpenLDAP is built on gentoo with hardened profile:
```
$ /usr/lib64/openldap/slapd -V
@(#) $OpenLDAP: slapd 2.6.8 (Jul 23 2025 23:10:57) $
@localhost:/var/tmp/portage/net-nds/openldap-2.6.8-r1/work/openldap-OPENLDAP_REL_ENG_2_6_8-abi_x86_64.amd64/servers/slapd
$ /usr/lib64/libc.so.6 -V
GNU C Library (Gentoo 2.41-r4 (patchset 6)) stable release version 2.41.
Copyright (C) 2025 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 14.3.0.
libc ABIs: UNIQUE IFUNC ABSOLUTE
Minimum supported kernel: 3.2.0
For bug reporting instructions, please see:
<https://bugs.gentoo.org/>.
```
Configuration is as follow:
```
pidfile /run/openldap/slapd.pid
argsfile /run/openldap/slapd.args
include /etc/openldap/schema/core.schema
include /etc/openldap/schema/cosine.schema
include /etc/openldap/schema/rfc2307bis.schema
include /etc/openldap/schema/inetorgperson.schema
include /etc/openldap/schema/rfc8284.schema
# From
https://raw.githubusercontent.com/jirutka/ssh-ldap-pubkey/refs/heads/master…
include /etc/openldap/schema/openssh-lpk.schema
#loglevel stats stats2
loglevel stats
# Load dynamic modules
moduleload argon2.so
moduleload pw-pbkdf2.so
moduleload pw-sha2.so
moduleload back_sql.so
moduleload pcache.so
# Transport Layer Security
TLSCertificateFile /etc/ssl/ldap/openldap.crt
TLSCertificateKeyFile /etc/ssl/ldap/openldap.key
TLSProtocolMin 3.4
TLSCipherSuite ECDHE+CHACHA20:ECDHE+AESGCM
TLSECName X448:P-384:X25519:P-256
# Default search base to use when client submits a non-base search request with
an empty base DN
defaultsearchbase dc=<redacted>,dc=<redacted>
# Hashes to be used in generation of user passwords
password-hash {ARGON2ID}
# Specify a set of conditions to require
require LDAPv3 strong
disallow bind_anon
# Set of security strength factors to require
security ssf=128
localSSF 256
# SASL security properties
sasl-secprops noanonymous,noplain
# SASL mapping
authz-regexp uid=([^@]+)@([^,]+),cn=login,cn=auth
uid=$1,ou=$2,dc=<redacted>,dc=<redacted>
authz-regexp uid=([^@]+)@([^,]+),cn=plain,cn=auth
uid=$1,ou=$2,dc=<redacted>,dc=<redacted>
# Allow access to root over SASL
access to *
by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
by * break
# Allow service authentication from UNIX socket only
access to dn.subtree="dc=local" attrs=userPassword
by sockname="PATH=/var/run/ldapi" auth
by anonymous auth
by * none
# Allow access to top level objects
access to dn.base="dc=local"
by users read
by * break
# Allow access to service CN
access to dn.subtree="dc=local"
by set.exact="this/cn & user/cn" read
by * break
# Allow user authentication
access to dn.subtree="dc=<redacted>,dc=<redacted>" attrs=userPassword
by anonymous auth
by * none
# Allow access to top level objects
access to dn.base="dc=<redacted>,dc=<redacted>"
by users read
by * break
# Allow access to users OU
access to dn.subtree="dc=<redacted>,dc=<redacted>"
by set.exact="this/ou & user/ou" read
by * break
# Allow services to access directory
access to dn.subtree="dc=<redacted>,dc=<redacted>"
by dn.exact="cn=<redacted>,dc=local" read
by dn.exact="cn=<redacted>,dc=local" read
by * break
# Deny everything else
access to *
by * none
# The config backend manages all of the configuration information for the
slapd(8) daemon.
database config
# Access control policy
access to dn.subtree="cn=config"
by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
by * none
# Database instance definition
database mdb
directory /var/lib/openldap-data/dc=local
# DN suffix of queries that will be passed to this backend database
suffix dc=local
# Database instance definition
database sql
dbname openldap
dbuser openldap
dbpasswd <redacted>
# DN suffix of queries that will be passed to this backend database
suffix dc=<redacted>,dc=<redacted>
rootdn "uid=root,dc=<redacted>,dc=<redacted>"
# Put the database into "read-only" mode
readonly yes
subtree_cond "ldap_entries.dn LIKE CONCAT('%',?)"
children_cond "ldap_entries.dn LIKE CONCAT('%,',?)"
dn_match_cond "ldap_entries.dn=?"
oc_query "SELECT id,name,keytbl,keycol,create_proc,delete_proc,expect_return
FROM ldap_oc_mappings"
at_query "SELECT
name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return,sel_expr_u
FROM ldap_attr_mappings WHERE oc_map_id=?"
id_query "SELECT id,keyval,oc_map_id,dn FROM ldap_entries WHERE dn=?"
insentry_stmt "INSERT INTO ldap_entries (dn,oc_map_id,parent,keyval) VALUES
(?,?,?,?)"
delentry_stmt "DELETE FROM ldap_entries WHERE id=?"
renentry_stmt "UPDATE ldap_entries SET dn=?,parent=?,keyval=? WHERE id=?"
delobjclasses_stmt "DELETE FROM ldap_entry_objclasses WHERE entry_id=?"
# Do not use DN in reverse uppercased form
has_ldapinfo_dn_ru no
# Caching of LDAP search requests in a local databas
overlay pcache
pcache mdb 65536 16 1024 60
directory /var/lib/openldap-data/pcache
pcacheMaxQueries 1024
# Cache DN
pcacheAttrset 0 1.1
pcacheTemplate (objectClass=) 0 3600 60 0 15
pcacheTemplate (objectClass=*) 0 3600 60 0 15
pcacheTemplate (&(objectClass=)(&(jpegPhoto=*)(|(mail=)))) 0 3600 60 0 15
pcacheAttrset 1 jid
pcacheTemplate (jid=) 1 3600 60 0 15
pcacheAttrset 2 ou cn givenname sn mail telephonenumber jid description
jpegphoto objectClass
pcacheTemplate (&(objectClass=)(&(jpegPhoto=*)(|(mail=)))) 2 3600 60 0 15
pcacheTemplate (objectClass=*) 2 3600 60 0 15
pcacheTemplate (objectClass=) 2 3600 60 0 15
pcacheAttrset 3 ou cn givenname sn mail telephonenumber description jpegphoto
objectClass
pcacheTemplate (&(objectClass=)(&(jpegPhoto=*)(|(mail=)))) 3 3600 60 0
pcacheTemplate (objectClass=*) 3 3600 60 0
pcacheTemplate (objectClass=) 3 3600 60 0
pcacheAttrset 4 mail
pcacheTemplate (objectClass=*) 4 3600 60 0
pcacheAttrset 5 * +
pcacheTemplate (objectClass=*) 5 3600 60 0 15
pcacheTemplate (mail=) 5 3600 60 0 15
```
Cheers,
Bertrand
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