openldap-bugs June 2021

openldap-bugs@openldap.org

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315 discussions

[Issue 9564] New: Race condition with freeing the spilled pages from transaction
by openldap-its＠openldap.org 04 Nov '25

04 Nov '25

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. -- You are receiving this mail because: You are on the CC list for the issue.

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[Bug 9245] New: devel/programming needs rewrite
by openldap-its＠openldap.org 28 Jan '25

28 Jan '25

https://bugs.openldap.org/show_bug.cgi?id=9245 Bug ID: 9245 Summary: devel/programming needs rewrite Product: website Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: --- Component: website Assignee: bugs(a)openldap.org Reporter: quanah(a)openldap.org Target Milestone: --- The information on the devel/programming web page is at least a decade out of date and needs a complete overhaul. -- You are receiving this mail because: You are on the CC list for the bug.

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[Issue 9356] New: Add list of peerSIDs to consumer cookie to reduce cross traffic
by openldap-its＠openldap.org 15 Oct '24

15 Oct '24

https://bugs.openldap.org/show_bug.cgi?id=9356 Issue ID: 9356 Summary: Add list of peerSIDs to consumer cookie to reduce cross traffic 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: --- If we add a list of peersids to the cookie, each consumer can tell the providers who else the consumers talk to and then the provider can omit sending updates to that consumer, originating from those peers There's some special handling needed if a connection dies If a consumer loses one of its peer connections, and after N retries is still not connected, it should send a new cookie to its remaining peers saying "here's my new peer list" with the missing one removed. Likewise, if a retry eventually connects again, it can send a new cookie again Make that peer list reset configurable in the syncrepl config stanza. This can help account for end admin knowledge that some links may be more or less stable than other ones. The idea here is that if one of your other peers can still see the missing peer, they can start routing updates to you again It should abandon all existing persist sessions and send a new sync search with the new cookie to all remaining peers For consumer side, also means adding the sid for a given provider into the syncrepl stanza to save on having to try and discover the peer sid. -- You are receiving this mail because: You are on the CC list for the issue.

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[Bug 9219] New: Streamline tool API for 2.5
by openldap-its＠openldap.org 15 Oct '24

15 Oct '24

https://bugs.openldap.org/show_bug.cgi?id=9219 Bug ID: 9219 Summary: Streamline tool API for 2.5 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: --- The current tool API is a mess and needs fixing for 2.5. This affects things like slapacl (The fix for bug#7920 was a kludge to deal with this, needs revisiting). -- You are receiving this mail because: You are on the CC list for the bug.

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[Bug 9193] New: HTML in mailing list description
by openldap-its＠openldap.org 19 Mar '24

19 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9193 Bug ID: 9193 Summary: HTML in mailing list description Product: website Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: --- Component: website Assignee: bugs(a)openldap.org Reporter: ryan(a)openldap.org Target Milestone: --- e.g. https://lists.openldap.org/postorius/lists/openldap-devel.openldap.org/ contains code for links and formatting, but all inside of a <pre> block. -- You are receiving this mail because: You are on the CC list for the bug.

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[Issue 9580] New: Refresh vs. accesslog in delta-MPR
by openldap-its＠openldap.org 07 Nov '23

07 Nov '23

https://bugs.openldap.org/show_bug.cgi?id=9580 Issue ID: 9580 Summary: Refresh vs. accesslog in delta-MPR Product: OpenLDAP Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Keywords: replication Severity: normal Priority: --- Component: overlays Assignee: bugs(a)openldap.org Reporter: ondra(a)mistotebe.net Target Milestone: --- A server consuming a plain syncrepl session (might be a delta-MMR refresh) still has to log the entries into accesslog, however that accesslog stops being capable of serving as a delta-sync source: - operation entryCSNs will be out-of-order - the changes logged will not be the intended modifications (e.g. if we fell back after a conflict, the conflicting entry will be replaced with the other version, other examples available) We need to deal with that somehow, at the very least we need to make sure the consumer will not take them at face value. We could record this in the accesslog root entry if we can detect when this starts and match it up with the final cookie, syncprov would still need some tweaks to understand it. We could mark the entries received this way and make sure delta-consumers treat them as "poison", as if they were running a plain syncrepl session themselves (not update contextCSN until that's finished, mark its own accesslog entries this way, ...). Anything like that needs guarantees that it will clean itself up once all of the real plain sessions finish otherwise we've lost delta-sync altogether. A different approach might or might not be needed for live delta-persist sessions replicating from a refreshing provider, but at least that syncprov has a way of detecting this live if it chooses to. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9341] New: Delta-sync MPR needs to be stable regardless of ordering
by openldap-its＠openldap.org 07 Nov '23

07 Nov '23

https://bugs.openldap.org/show_bug.cgi?id=9341 Issue ID: 9341 Summary: Delta-sync MPR needs to be stable regardless of ordering Product: OpenLDAP Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Keywords: replication Severity: normal Priority: --- Component: backends Assignee: bugs(a)openldap.org Reporter: ondra(a)mistotebe.net Target Milestone: --- If two or more updates are spread across several providers before they have a chance to learn about the others, all replicas need to arrive at the same content regardless of the order in which they arrive. One example that is broken at the moment: - (csn a) server 1 accepts a modify - (csn b) server 2 accepts a delete on the same DN - (csn c) server 2 accepts an add on that DN again If a replica receives the actions in the order bca vs. abc, the content of the entry will be different even though the final CSN set is the same -> they will never converge. The ordering 'bac' also needs to result in eventual convergence, even if it means a refresh or replication from either provider stalling temporarily? Merge request with this test case (so far): https://git.openldap.org/openldap/openldap/-/merge_requests/145 -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9547] New: OpenLDAP does not send port as SPN when authenticating SASL GSSAPI
by openldap-its＠openldap.org 07 Nov '23

07 Nov '23

https://bugs.openldap.org/show_bug.cgi?id=9547 Issue ID: 9547 Summary: OpenLDAP does not send port as SPN when authenticating SASL GSSAPI Product: OpenLDAP Version: 2.4.44 Hardware: x86_64 OS: Linux Status: UNCONFIRMED Severity: normal Priority: --- Component: libraries Assignee: bugs(a)openldap.org Reporter: robert.wilson1717(a)gmail.com Target Milestone: --- When trying to authenticate to an ADLDS server using kerberos and a MIT ccache, OpenLdap only passes the hostname to the SASL mechanism, causing a mismatch between the SPN in the client "ldap/adlds.my.domain" and the one registered in AD "ldap/adlds.my.domain:50000" Is there a way fo forcing OpenLDAP to pass the port as part of the SASL request? Or is there a part of the OpenLDAP -> Cyprus-SASL -> MIT KRB5 chain where this can be enabled? -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9506] New: dynlist: member expansion when member attribute not requested
by openldap-its＠openldap.org 07 Nov '23

07 Nov '23

https://bugs.openldap.org/show_bug.cgi?id=9506 Issue ID: 9506 Summary: dynlist: member expansion when member attribute not requested Product: OpenLDAP Version: 2.5 Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: --- Component: overlays Assignee: bugs(a)openldap.org Reporter: quanah(a)openldap.org Target Milestone: --- When configured to do dynamic "member" expansion, i.e.: overlay dynlist dynlist-attrset groupOfURLs memberURL member Any query against an object that would trigger this expansion will incur a penalty while dynlist does the expansion work even if there was no request for the member attribute. Currently that can be worked around by specifying the manageDSAit control when doing a search on the object, but this may not be feasible for some client applications and additionally other directory servers do not do this expansion for their dynamic group implementations unless the underlying configured attribute is explicitly requested. We've already implemented this in dynlist for the memberOfAD case, we should do it here as well. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9269] New: "hidden" "subordinate" database is shown in a directory tree
by openldap-its＠openldap.org 07 Nov '23

07 Nov '23

https://bugs.openldap.org/show_bug.cgi?id=9269 Issue ID: 9269 Summary: "hidden" "subordinate" database is shown in a directory tree Product: OpenLDAP Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: --- Component: slapd Assignee: bugs(a)openldap.org Reporter: grapvar(a)gmail.com Target Milestone: --- "hidden" configuration option is ignored by slapd (not honored by "glue" overlay?) if the database it tries to hide is also a "subordinate" database. Checked for openldap 2.4.47 and current git master (f3952d9). -- You are receiving this mail because: You are on the CC list for the issue.

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openldap-bugs June 2021