openldap-bugs August 2026

openldap-bugs@openldap.org

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237 discussions

[Issue 10455] New: Allow handling of empty group in memberof_saveMember_cb()
by openldap-its＠openldap.org 09 Sep '26

09 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10455 Issue ID: 10455 Summary: Allow handling of empty group in memberof_saveMember_cb() Product: OpenLDAP Version: 2.6.12 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: overlays Assignee: bugs(a)openldap.org Reporter: roger.j.meier(a)gmx.ch Target Milestone: --- Created attachment 1117 --> https://bugs.openldap.org/attachment.cgi?id=1117&action=edit Protect e_attrs with a NULL pointer test instead of an assert() to allow empty groups In slapd/overlays/memberof.c, the callback memberof_saveMember_cb() uses two assert statements for the sr_entry and its e_attrs pointer in sequence. This makes the service abort on an empty group. If the use of rs->sr_entry->e_attrs is just protected by a test of the e_attrs pointer, the code does not abort and allows empty groups. Please consider to add this patch to the official source. It was now several month in production and did not lead to unexpected results. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10568] New: Client tools segfault when run without arguments
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10568 Issue ID: 10568 Summary: Client tools segfault when run without arguments Product: OpenLDAP Version: 2.7.0 Hardware: x86_64 OS: Linux Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: client tools Assignee: bugs(a)openldap.org Reporter: nzb_tuxxx(a)proton.me Target Milestone: --- When the default connection fails, several client tools call `strlen(ldapuri)` while `ldapuri` is `NULL`. Steps to reproduce: 1. Run `ldapadd`, `ldapdelete`, `ldapmodify`, `ldapmodrdn`, `ldappasswd`, `ldapsearch`, `ldapvc`, or `ldapwhoami` without arguments. 2. Observe `Segmentation fault (core dumped)` and exit status 139. References: - Regression: https://git.openldap.org/openldap/openldap/-/commit/37d677fb8d16b05a387c9f9… - Downstream report: https://gitlab.archlinux.org/archlinux/packaging/packages/openldap/-/work_i… -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10571] New: Asyncmeta's conn-ttl optional reset-interval argument silently defaults to the TTL
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10571 Issue ID: 10571 Summary: Asyncmeta's conn-ttl optional reset-interval argument silently defaults to the TTL Product: OpenLDAP Version: 2.7.0 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: backends Assignee: bugs(a)openldap.org Reporter: ondra(a)mistotebe.net Target Milestone: --- mc->mc_conn_reset_interval is set to TTL if the 1 argument form is configured (no value for <interval> provided) but as per manpage it should default to `1` instead. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10576] New: modify dn is not logged when STATS2 is on
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10576 Issue ID: 10576 Summary: modify dn is not logged when STATS2 is on Product: OpenLDAP Version: 2.7.0 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: slapd Assignee: bugs(a)openldap.org Reporter: ondra(a)mistotebe.net Target Milestone: --- ITS#9042 hid the line in the else branch, it should be outside the if with a STATS|STATS2 filter. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10579] New: tlso_sb_{read,write} don't handle the opposite condition
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10579 Issue ID: 10579 Summary: tlso_sb_{read,write} don't handle the opposite condition Product: OpenLDAP Version: 2.7.0 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: lloadd Assignee: bugs(a)openldap.org Reporter: ondra(a)mistotebe.net Target Milestone: --- With non-blocking BIO (lloadd), a SSL_write can error out with SSL_ERROR_WANT_READ and vice versa, e.g. at renegotiation or more points if TLS 1.3 is in place. Without knowing that, lloadd (or other applications if we ever say non-blocking OpenSSL use is supported) cannot make the right decisions, e.g. close a healthy connection. Of course lloadd also needs to expect this situation and arm the correct callback otherwise things get even worse. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10582] New: The method 'date -u -r ... %T' to print time periods when testing is incorrectly implemented
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10582 Issue ID: 10582 Summary: The method 'date -u -r ... %T' to print time periods when testing is incorrectly implemented Product: OpenLDAP Version: 2.6.14 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: test suite Assignee: bugs(a)openldap.org Reporter: Peter_Dyballa(a)Web.DE Target Milestone: --- 'date -u -r ... %T' works when "..." stands for a file name. Otherwise one gets: In tests/scripts/all the decision is made which date utility has to be controlled: # check for BSD vs GNU date date -j >/dev/null 2>&1 RC=$? if [ $RC -ne 0 ]; then DATEOPT="-d @" else DATEOPT="-r " fi On Macs 'date -j' produces useful output (So 30 Aug 2026 18:57:39 CEST), so it's decided to use -r on Macs – which implies that the argument following this option is a file. And so date has to complain: date: 0: No such file or directory ... date: 23: No such file or directory ... It might work to change the time() function become for example: timer() { if [ -n "$STARTTIME" ]; then now=`date +%s` delta=`expr $now - $STARTTIME` touch $delta date -u $DATEOPT $delta +%T fi } For Macs it might work to patch tests/scripts/all to start with gdate -j >/dev/null 2>&1 Then timer() would use -d @ which gdate and the macOS systems' date do understand. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10578] New: libldap never clears OpenSSL error queue so SSL_get_error() can misreport on OpenSSL <4.0
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10578 Issue ID: 10578 Summary: libldap never clears OpenSSL error queue so SSL_get_error() can misreport on OpenSSL <4.0 Product: OpenLDAP Version: 2.7.0 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: libraries Assignee: bugs(a)openldap.org Reporter: ondra(a)mistotebe.net Target Milestone: --- SSL_get_error() needs the calling thread's error queue to be empty before the SSL_* calls that could have produced one but we never make sure that's the case. SSL_get_error() doesn't actually clear the error from the queue, so if a SSL_* call returns an error on OpenSSL <4.0, it stays around as poison. This can manifest e.g. as an otherwise healthy connection being suddenly terminated with a reason that doesn't track. We should just call ERR_clear_error() before every SSL_* call that can set it to get something meaningful back. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10561] New: multiple logging.c minor issues
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10561 Issue ID: 10561 Summary: multiple logging.c minor issues Product: OpenLDAP Version: 2.6.13 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: slapd Assignee: bugs(a)openldap.org Reporter: dontbugme.relocate646(a)slmail.me Target Milestone: --- Created attachment 1185 --> https://bugs.openldap.org/attachment.cgi?id=1185&action=edit servers/slapd/logging.c surprising behaviors # OpenLDAP `slapd` log-file engine — observed bugs and pitfalls This document lists defects and surprising behaviors identified by reading `servers/slapd/logging.c` (the `logfile`, `logfile-format`, `logfile-only` and `logfile-rotate` implementation) in this tree. All line references point to that file. > Scope: these concern the **internal** log file that `slapd` writes itself when > `logfile <path>` is configured. They are independent of `rsyslogd`/`syslog-ng`. --- ## Bug 1 — `loglevel`/`olcLogLevel` messages are *not* written to the logfile unless `logfile-only on` ### What happens `slapd` maintains two separate diagnostic streams: * the **debug stream** (`slap_debug`), fed by the `-d` command-line flag, and * the **syslog stream** (`ldap_syslog`), fed by `loglevel`/`olcLogLevel` (and `-s`). The internal log file is written **only** from the debug stream. The actual write is done in `slap_debug_print()`, which is the `LBER_OPT_LOG_PRINT_FN` callback fired for every `ber_log*` message whose level passes `slap_debug` (`logging.c:138` and `:222`). Messages that only pass `ldap_syslog` are emitted through `syslog()` and never reach the file. `logfile-only` controls this: * `logfile-only off` (default): `slap_debug_print()` also writes to stderr (`:135`), and syslog messages stay in syslog — **they never land in the file**. * `logfile-only on`: `slap_syslog_set()` ORs the syslog level into `slap_debug` and zeroes `ldap_syslog` (`:571-581`, `:807-819`, `:593-600`), so syslog messages now flow into the file — **but syslog itself is disabled**. So there is **no configuration that writes *both* syslog and a complete log file**. Setting `logfile` + `loglevel stats` is the trap most operators fall into: stats go to syslog, and the file stays empty (unless you also used `-d` or `logfile-only on`). ### How to reproduce `slapd.conf` (or `cn=config` equivalent): ``` logfile /tmp/slapd.log loglevel stats # (no -d flag, no logfile-only) ``` 1. Start `slapd -f slapd.conf -h "ldap://:3899/"` (do **not** pass `-d`). 2. Bind / search a few times. 3. Inspect the file: ```sh cat /tmp/slapd.log # empty (or only the startup Versionstr line) journalctl -t slapd # shows "conn=N op=M ... RESULT" stats lines ``` 4. Stop, add `logfile-only on`, restart, repeat. Now: ```sh cat /tmp/slapd.log # stats lines ARE present journalctl -t slapd # stats lines are GONE (syslog disabled) ``` ### Severity High for operators expecting `logfile` + `loglevel` to mirror syslog. The behavior is by design but undocumented as a limitation. --- ## Bug 2 — Stale PID in syslog-style log prefixes (`getpid()` captured before `fork()`) ### What happens When `logfile-format` is one of the syslog-style values (`syslog-utc`/`syslog-localtime`/`rfc3339-utc`), the prefix string `"<host> <prog>[<pid>]: "` is built **once**, at config-parse time, inside the `CFG_LOGFILE_FORMAT` handler (`logging.c:852-856`): ```c splen = sprintf( syslog_prefix, "%s %s %s[%d]: ", ..., serverName, getpid() ); ``` `config_logging()` runs while `slapd` is still the original process. `slapd` then daemonizes (`slapd_daemon()` forks), so the child that actually does the logging has a **different PID** than the one baked into `syslog_prefix`. Every line in the file therefore shows the pre-fork parent PID, not the PID of the running daemon. ### How to reproduce `slapd.conf`: ``` logfile /tmp/slapd.log logfile-format syslog-localtime loglevel stats ``` 1. Start `slapd` in daemon mode (default): `slapd -f slapd.conf -h "ldap://:3899/"`. 2. Find the real daemon PID: ```sh pidof slapd cat /run/slapd/slapd.pid # or wherever pidfile points ``` 3. Trigger a line (any search) and look at the prefix in the file: ```sh head -3 /tmp/slapd.log # e.g. Aug 05 10:40:12 host slapd[1234]: conn=1 ... ``` `1234` is the PID of the short-lived parent, not the daemon PID printed by `pidof slapd`. ### Severity Medium. Cosmetic for single-instance setups, but misleading for log analysis / process correlation and for systems that run `slapd` under a supervisor that expects the logged PID to match the supervised process. --- ## Bug 3 — `logfile-format default` is identical to `logfile-format debug` ### What happens The log-file header is only rebuilt when `logfile_format > LFMT_DEBUG` (`logging.c:185`). For `LFMT_DEFAULT` (value `0`) and `LFMT_DEBUG` (value `1`) the `iov[0]` debug prefix (`"%lx.<frac> <pthread> "`, built at `:130`) is used verbatim. So: * `default` → raw `epoch.hex <threadptr> ` prefix, **no** date, **no** hostname, **no** PID; * `debug` → exactly the same. The name `default` suggests a "normal" syslog-like line, but it is just the `-d`-style debugging prefix. The only formats that actually add a timestamp / host / PID header are `syslog-utc`, `syslog-localtime` and `rfc3339-utc`. ### How to reproduce ``` logfile /tmp/default.log logfile-format default loglevel stats # (separate run) logfile /tmp/debug.log logfile-format debug loglevel stats ``` Run `slapd`, trigger one operation in each, then `diff`: ```sh head -1 /tmp/default.log; head -1 /tmp/debug.log # byte-identical prefixes ``` ### Severity Low. Documentation/naming clarity issue; can surprise anyone expecting human-readable timestamps from the default format. --- ## Bug 4 — Rotation numbered-shift runs outside the mutex (lost backups under load) ### What happens Rotation is split in two: 1. Under `logfile_mutex` (`:140-183`): the current file is renamed to `<path>.tmp` (`:147-148`) and a fresh file is reopened (`:166`). 2. **After** the mutex is released (`:227`), the numbered-shift loop runs (`:229-238`): it renames `<path>.tmp` → `<path>.NN` and shifts older `<path>.NN` → `<path>.N(N+1)`. Because step 2 executes outside the lock, two (or more) threads that both tripped the size/age threshold can interleave: ``` T1: under lock -> rename current -> .tmp ; reopen ; unlock T2: under lock -> rename NEW current -> .tmp ; reopen ; unlock T1: outside lock-> rename .tmp -> .NN (this .tmp is actually T2's rotated file) T2: outside lock-> rename .tmp -> .NN (no .tmp exists anymore -> rename() fails, the backup T2 meant to keep is lost) ``` Consequences under heavy concurrent logging near the rotation threshold: * a rotated backup can be silently overwritten / lost, and * `rename()` is called on a `.tmp` that no longer exists (returns `-1`, ignored). The trigger-to-`.tmp` step is safe (under the lock) but the hand-off to the outside-lock shift is racy because the shared `.tmp` name is reused by every rotation event. ### How to reproduce (best-effort, not deterministic) ``` logfile /tmp/slapd.log logfile-format debug logfile-rotate 5 1 0 # 5 backups, 1 MB size limit, no age limit loglevel any # enable verbose categories ``` Drive a very high-volume debug stream so the file crosses 1 MB repeatedly in a short window (e.g. `loglevel sync stats packets` plus a busy replication session, or a tight loop of anonymous binds). Then list backups: ```sh ls -la /tmp/slapd.log* ``` Expected: `.01` … `.05` present and strictly ordered by age. Observed under load: gaps (e.g. `.01 .02 .04 .05` with `.03` missing) or a rotation where the oldest retained copy is newer than it should be, indicating a backup was clobbered by a racing rotation. > Note: because the race is timing-dependent, run the load several times; the > failure is intermittent, which is itself the signature of a lock-ordering bug. ### Severity Low-to-medium. Only matters with `logfile-rotate` enabled and very high log volume. Data-loss is of rotated *backups*, not of the live log. --- ## Bug 5 — Age-based rotation uses inode change time, not file create/modify time ### What happens When a file is (re)opened, the rotation "birth" timestamp is taken from `st_ctime` (`logging.c:287`): ```c logfile_fcreated = st.st_ctime; /* not strictly true but close enough */ ``` The comment admits the approximation. `st_ctime` changes on *any* inode metadata change (chmod, chown, rename, truncate, `touch -c`), not just content creation. Age-based rotation (`logfile-rotate <max> <MB> <hours>`) therefore measures the interval since the last inode-changing event, which can be reset by an external tool (logrotate `copytruncate`, backup, permission change) and produce an unexpectedly early or late rotation. ### How to reproduce ``` logfile /tmp/slapd.log logfile-format debug logfile-rotate 3 0 1 # rotate every 1 hour (no size limit) loglevel stats ``` 1. Start `slapd`; note the time. 2. Before the hour elapses, touch the inode metadata externally: ```sh touch /tmp/slapd.log # updates ctime (open with O_TRUNC not needed) ``` 3. Watch rotation: it can fire based on the *touch* time rather than the daemon's own start/last-write time, because `logfile_fcreated` reflects `ctime`. ### Severity Low. Edge-case affecting operators who let an external tool also touch the logfile. --- ## Summary table | # | Bug | Config affected | Effect | Can lose data? | |---|-----|-----------------|--------|----------------| | 1 | `loglevel` not written to file unless `logfile-only on` | `logfile`+`loglevel` | file misses syslog-level messages | no (silent gap) | | 2 | Stale PID in syslog-style prefixes | `logfile-format syslog-*`/`rfc3339-*` | wrong `[pid]` in every line | no | | 3 | `default` == `debug` output | `logfile-format default` | no timestamp/host/pid header | no | | 4 | Rotation shift outside mutex | `logfile-rotate` under load | lost/overwritten backups | yes (backups only) | | 5 | Age rotation uses `ctime` | `logfile-rotate … <hours>` | wrong rotation timing | no | --- ## Workarounds * To get `loglevel` content in the file, use `logfile-only on` **and** accept that native syslog logging is then disabled — or run `slapd -d <level>` instead of `loglevel`, or keep `rsyslogd` as the file writer. * For correct per-line PID/timestamps, prefer `logfile-format rfc3339-utc` (still has the stale-PID issue from Bug 2, but at least a real timestamp). * Avoid relying on `logfile-rotate` for audit-grade retention under very high log volume; use an external log rotator that copies and truncates, or pipe to `rsyslogd`. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10577] New: Memory leak in client-side libldap response handling when a malformed BER message causes an error.
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10577 Issue ID: 10577 Summary: Memory leak in client-side libldap response handling when a malformed BER message causes an error. Product: OpenLDAP Version: 2.6.8 Hardware: x86_64 OS: Linux Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: client tools Assignee: bugs(a)openldap.org Reporter: thetrenshow157(a)gmail.com Target Milestone: --- Created attachment 1195 --> https://bugs.openldap.org/attachment.cgi?id=1195&action=edit Reproduction script During client-side libldap fuzzing, a memory leak was found when processing a malformed BER response. If a response contains a valid message ID matching an outstanding request, `ldap_find_request_by_msgid()` increments the `LDAPRequest` reference count. If the following TLV declares a length larger than the remaining BER data, `ber_peek_tag()` returns `LBER_ERROR` and `try_read1msg()` returns `-1` without releasing the acquired request reference. As a result, the `LDAPRequest` and its associated allocations are leaked. The attached reproducer triggers the issue with a malformed BindResponse, but the issue is not specific to the request type. The Valgrind log was collected with OpenLDAP 2.6.8, but the memory leak is still reproducible on the latest development branch. Although such a malformed response is not expected from a compliant server, it would still be better to handle this error path without leaking memory. I have attached the reproducer script and the Valgrind log to this message. Valgrind log: ==307307== Memcheck, a memory error detector ==307307== Copyright (C) 2002-2024, and GNU GPL'd, by Julian Seward et al. ==307307== Using Valgrind-3.26.0 and LibVEX; rerun with -h for copyright info ==307307== Command: ldapsearch -x -H ldap://127.0.0.1:37095/ -D cn=Directory\ Manager -w password -b dc=example,dc=com -s base (objectClass=*) -o nettimeout=2 -l 2 ==307307== ldap_result: Can't contact LDAP server (-1) ==307307== ==307307== HEAP SUMMARY: ==307307== in use at exit: 4,290 bytes in 4 blocks ==307307== total heap usage: 165 allocs, 161 frees, 106,847 bytes allocated ==307307== ==307307== 4,276 (136 direct, 4,140 indirect) bytes in 1 blocks are definitely lost in loss record 4 of 4 ==307307== at 0x48664A4: calloc (vg_replace_malloc.c:1678) ==307307== by 0x48E7A4C: ber_memcalloc_x (memory.c:283) ==307307== by 0x48AA75A: ldap_send_server_request (request.c:349) ==307307== by 0x48AAD8F: ldap_send_initial_request (request.c:169) ==307307== by 0x489B296: ldap_sasl_bind (sasl.c:164) ==307307== by 0x400F226: tool_bind (common.c:1593) ==307307== by 0x400593A: main (ldapsearch.c:1109) ==307307== ==307307== LEAK SUMMARY: ==307307== definitely lost: 136 bytes in 1 blocks ==307307== indirectly lost: 4,140 bytes in 2 blocks ==307307== possibly lost: 0 bytes in 0 blocks ==307307== still reachable: 14 bytes in 1 blocks ==307307== suppressed: 0 bytes in 0 blocks ==307307== Reachable blocks (those to which a pointer was found) are not shown. ==307307== To see them, rerun with: --leak-check=full --show-leak-kinds=all ==307307== ==307307== For lists of detected and suppressed errors, rerun with: -s ==307307== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0) -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10563] New: ldap_count_message() returns '1' even with empty LDAPMessage as input.
by openldap-its＠openldap.org 08 Sep '26

08 Sep '26

https://bugs.openldap.org/show_bug.cgi?id=10563 Issue ID: 10563 Summary: ldap_count_message() returns '1' even with empty LDAPMessage as input. Product: OpenLDAP Version: 2.6.13 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: libraries Assignee: bugs(a)openldap.org Reporter: feh(a)fehcom.de Target Milestone: --- Source: libldap/messages.c The function int ldap_count_messages( LDAP *ld, LDAPMessage *chain ) given *chain is NULL will return a '1' as result. Line numbers included: 49 int 50 ldap_count_messages( LDAP *ld, LDAPMessage *chain ) 51 { 52 int i; 53 54 assert( ld != NULL ); 55 assert( LDAP_VALID( ld ) ); 56 57 for ( i = 0; chain != NULL; chain = chain->lm_chain ) { 58 i++; 59 } 60 61 return( i ); 62 } It would be sufficient to test the LDAP message *chain in the following way before the for loop is executed: line 56: if (!chain && !*chain) return ( 0 ); --eh. -- You are receiving this mail because: You are on the CC list for the issue.

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openldap-bugs August 2026