openldap-bugs July 2024

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[Issue 10241] New: Crash in mdb_page_search_root()
by openldap-its＠openldap.org 22 Jul '24

22 Jul '24

https://bugs.openldap.org/show_bug.cgi?id=10241 Issue ID: 10241 Summary: Crash in mdb_page_search_root() Product: LMDB Version: 0.9.24 Hardware: x86_64 OS: Linux Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: liblmdb Assignee: bugs(a)openldap.org Reporter: david.komarek(a)whalebone.io Target Milestone: --- Hello, The LMDB is crashing in mdb_page_search_root() on following instruction `0x7f85221479d2 movzwl 0xa(%rdx),%eax`. This instruction corresponds to following line in source code - https://github.com/LMDB/lmdb/blob/LMDB_0.9.24/libraries/liblmdb/mdb.c#L5485 (while access mp_flags in MDB_page structure) Here is callstack as generated by core dump (without symbols as we're using package from Ubuntu repositories) ``` Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007f85221479d2 in ?? () from /usr/lib/x86_64-linux-gnu/liblmdb.so.0 No symbol table info available. #1 0x00007f8522147d15 in ?? () from /usr/lib/x86_64-linux-gnu/liblmdb.so.0 No symbol table info available. #2 0x00007f8522148432 in ?? () from /usr/lib/x86_64-linux-gnu/liblmdb.so.0 No symbol table info available. #3 0x00007f8522148a70 in mdb_get () from /usr/lib/x86_64-linux-gnu/liblmdb.so.0 No symbol table info available. ``` Translation ``` #0 mdb_page_search_root() #1 mdb_page_search() #2 mdb_cursor_set() #3 mdb_get() ``` Registers in time of crash: ``` rax 0x2 2 rbx 0x7ffcd8d2a100 140723946168576 rcx 0x3 3 rdx 0x7f825baf7000 140197860700160 rsi 0x1000 4096 rdi 0x7f851c00f4d0 140209677202640 rbp 0x0 0x0 rsp 0x7ffcd8d29e40 0x7ffcd8d29e40 r8 0x7ffcd8d29e50 140723946167888 r9 0x7f851c00f5b8 140209677202872 r10 0x7f851c003090 140209677152400 r11 0x2ce33e6c02ce33e7 3234497591006606311 r12 0x0 0 r13 0x7ffcd8d2a510 140723946169616 r14 0x79 121 r15 0x7f851c003098 140209677152408 rip 0x7f85221479d2 0x7f85221479d2 eflags 0x10246 [ PF ZF IF RF ] cs 0x33 51 ss 0x2b 43 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 k0 0x40 64 k1 0xfffff0f0 4294963440 k2 0xff01 65281 k3 0xffffffff 4294967295 k4 0xffffffff 4294967295 k5 0xffffffff 4294967295 k6 0xffffffff 4294967295 k7 0x0 0 ``` Our setup is following: We have single process (running in separate container) which reads and writes to LMDB. It opens environment with following flags MDB_NORDAHEAD|MDB_WRITEMAP|MDB_NOTLS|MDB_NOSYNC. The environment contain several DBs. All DBIs are open with MDB_CREATE flag. Transactions are open without flags. On the other hand we have several processes running in the single container, which are only allowed read (these processes crash). The environment is open with following flags MDB_NORDAHEAD|MDB_WRITEMAP|MDB_NOTLS|MDB_RDONLY. All DBIs are open without flags. Transactions are open with MDB_RDONLY flag. Could you please investigate it? If you will need some other artifacts or comments, please let me know. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10240] New: Information required about the end of support date for OpenLDAP ver 2.6.3
by openldap-its＠openldap.org 16 Jul '24

16 Jul '24

https://bugs.openldap.org/show_bug.cgi?id=10240 Issue ID: 10240 Summary: Information required about the end of support date for OpenLDAP ver 2.6.3 Product: OpenLDAP Version: 2.6.3 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: documentation Assignee: bugs(a)openldap.org Reporter: bluesoulprince(a)gmail.com Target Milestone: --- Hi Team, As we have integrated OpenLDAP 2.6.3 version in our application, we would like to know the community support availability end of date for this version, to plan our application maintenance accordingly. Could you please help us with this information. Thanks, Vivek S -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10236] New: fragmentation makes mdb_page_alloc slow
by openldap-its＠openldap.org 16 Jul '24

16 Jul '24

https://bugs.openldap.org/show_bug.cgi?id=10236 Issue ID: 10236 Summary: fragmentation makes mdb_page_alloc slow Product: LMDB Version: 0.9.31 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: liblmdb Assignee: bugs(a)openldap.org Reporter: aalekseyev(a)janestreet.com Target Milestone: --- Created attachment 1022 --> https://bugs.openldap.org/attachment.cgi?id=1022&action=edit patch is relative to LMDB_0.9.31 It's a known problem that mdb_page_alloc can be slow when the free list is large and fragmented. [1] [2] [3] I'm not sure it's known *how* slow it can be. In our workload we saw a fragmented freelist leading to a pathological O(n^2) behavior. To handle a multi-page allocation we iterate loading chunks of the free list one by one, and at every iteration we do O(n) work to check if the allocation can succeed. Even small-ish allocations (tens of pages) are repeatedly hitting this edge case, with free list growing to ~1000000, and the outer loop taking ~2000 iterations (10^9 worth of work in total, just to allocate a few pages). Even though I'm sure there are ways to avoid hitting this pathological scenario so much (avoid values larger than 4k, or fix whatever causes fragmentation), it seems unacceptable to have a performance cliff this bad. I made a patch to make the allocation take ~O(n*log(n)), by loading and merging multiple chunks at once instead of doing it one-by-one. I'd appreciate it if someone could review the patch (attached), improve it, and/or come up with an alternative fix. The code in `midl.c` is kinda meme-y, including a contribution from GPT-4o, but it performs well enough to speed up our pathological workload by ~20x (which is still ~3x away from the non-fragmented case). Anyway, the main thing that warrants scrutiny is the change in `mdb.c`: I understand very little about lmdb internals and I worry that loading multiple pages at once instead of one-by-one might break something. [1] issue #8664 [2] https://lists.openldap.org/hyperkitty/list/openldap-bugs@openldap.org/threa… [3] https://lists.openldap.org/hyperkitty/list/openldap-technical@openldap.org/… -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10239] New: The slapd domain name is inconsistent, synchronization cannot be modified by the rewrite dn parameter dc.
by openldap-its＠openldap.org 16 Jul '24

16 Jul '24

https://bugs.openldap.org/show_bug.cgi?id=10239 Issue ID: 10239 Summary: The slapd domain name is inconsistent, synchronization cannot be modified by the rewrite dn parameter dc. Product: OpenLDAP Version: 2.4.44 Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: slapd Assignee: bugs(a)openldap.org Reporter: 2458943823(a)qq.com Target Milestone: --- /etc/openldap/slapd: syncrepl rid=002 provider=ldap://172.18.1.1 bindmethod=simple binddn="cn=Manager,dc=wsc,dc=ls,dc=com" credentials=lnewnews1tter searchbase="dc=wsc,dc=ls,dc=com" schemachecking=off type=refreshAndPersist retry="60 +" rewrite dn "dc=wsc,dc=ls,dc=com" "dc=wsc,dc=slave1,dc=ls,dc=com" The error is as follows: 66912211 /etc/openldap/slapd.conf: line 281: Error: parse_syncrepl_line: unable to parse "rewrite" . 66912211 failed to add syncinfo slaptest: bad configuration directory! -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10238] New: libldap-2.5-0 kept back from upgrade
by openldap-its＠openldap.org 12 Jul '24

12 Jul '24

https://bugs.openldap.org/show_bug.cgi?id=10238 Issue ID: 10238 Summary: libldap-2.5-0 kept back from upgrade Product: JLDAP Version: unspecified Hardware: x86_64 OS: Linux Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: JLDAP Assignee: bugs(a)openldap.org Reporter: sonny_ward23(a)yahoo.com Target Milestone: --- sonny@sjw-T470p:~$ sudo apt update Ign:1 https://mirrors.ocf.berkeley.edu/linuxmint-packages virginia InRelease Hit:2 https://dl.google.com/linux/chrome/deb stable InRelease Hit:3 https://mirrors.ocf.berkeley.edu/linuxmint-packages virginia Release Hit:4 http://security.ubuntu.com/ubuntu jammy-security InRelease Hit:5 http://mirror.arizona.edu/ubuntu jammy InRelease Hit:6 http://mirror.arizona.edu/ubuntu jammy-updates InRelease Hit:7 http://mirror.arizona.edu/ubuntu jammy-backports InRelease Reading package lists... Done Building dependency tree... Done Reading state information... Done 1 package can be upgraded. Run 'apt list --upgradable' to see it. sonny@sjw-T470p:~$ apt list --upgradable -a Listing... Done libldap-2.5-0/jammy-updates 2.5.18+dfsg-0ubuntu0.22.04.1 amd64 [upgradable from: 2.5.17+dfsg-0ubuntu0.22.04.1] libldap-2.5-0/now 2.5.17+dfsg-0ubuntu0.22.04.1 amd64 [installed,upgradable to: 2.5.18+dfsg-0ubuntu0.22.04.1] libldap-2.5-0/jammy-security 2.5.16+dfsg-0ubuntu0.22.04.2 amd64 libldap-2.5-0/jammy 2.5.11+dfsg-1~exp1ubuntu3 amd64 sonny@sjw-T470p:~$ sudo apt upgrade Reading package lists... Done Building dependency tree... Done Reading state information... Done Calculating upgrade... Done The following packages have been kept back: libldap-2.5-0 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. sonny@sjw-T470p:~$ apt show libldap-2.5-0 -a Package: libldap-2.5-0 Version: 2.5.18+dfsg-0ubuntu0.22.04.1 Priority: optional Section: libs Source: openldap Origin: Ubuntu Maintainer: Ubuntu Developers <ubuntu-devel-discuss(a)lists.ubuntu.com> Original-Maintainer: Debian OpenLDAP Maintainers <pkg-openldap-devel(a)lists.alioth.debian.org> Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 579 kB Depends: libc6 (>= 2.34), libgnutls30 (>= 3.7.2), libsasl2-2 (>= 2.1.27+dfsg2) Recommends: libldap-common Conflicts: ldap-utils (<= 2.1.23-1) Replaces: libldap-2.3-0, libldap2 Homepage: https://www.openldap.org/ Task: server-minimal, print-server, ubuntu-desktop-minimal, lamp-server, samba-server, ubuntu-desktop, cloud-image, postgresql-server, ubuntu-desktop-raspi, ubuntu-wsl, mail-server, server, ubuntu-server-raspi, kubuntu-desktop, xubuntu-core, xubuntu-desktop, lubuntu-desktop, ubuntustudio-desktop-core, ubuntustudio-desktop, ubuntukylin-desktop, ubuntu-mate-core, ubuntu-mate-desktop, ubuntu-budgie-desktop, ubuntu-budgie-desktop-raspi Phased-Update-Percentage: 20 Download-Size: 183 kB APT-Sources: http://mirror.arizona.edu/ubuntu jammy-updates/main amd64 Packages Description: OpenLDAP libraries These are the run-time libraries for the OpenLDAP (Lightweight Directory Access Protocol) servers and clients. Package: libldap-2.5-0 Version: 2.5.17+dfsg-0ubuntu0.22.04.1 Status: install ok installed Priority: optional Section: libs Source: openldap Maintainer: Ubuntu Developers <ubuntu-devel-discuss(a)lists.ubuntu.com> Original-Maintainer: Debian OpenLDAP Maintainers <pkg-openldap-devel(a)lists.alioth.debian.org> Installed-Size: 579 kB Depends: libc6 (>= 2.34), libgnutls30 (>= 3.7.2), libsasl2-2 (>= 2.1.27+dfsg2) Recommends: libldap-common Conflicts: ldap-utils (<= 2.1.23-1) Replaces: libldap-2.3-0, libldap2 Homepage: https://www.openldap.org/ Download-Size: unknown APT-Manual-Installed: yes APT-Sources: /var/lib/dpkg/status Description: OpenLDAP libraries These are the run-time libraries for the OpenLDAP (Lightweight Directory Access Protocol) servers and clients. Package: libldap-2.5-0 Version: 2.5.16+dfsg-0ubuntu0.22.04.2 Priority: optional Section: libs Source: openldap Origin: Ubuntu Maintainer: Ubuntu Developers <ubuntu-devel-discuss(a)lists.ubuntu.com> Original-Maintainer: Debian OpenLDAP Maintainers <pkg-openldap-devel(a)lists.alioth.debian.org> Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 579 kB Depends: libc6 (>= 2.34), libgnutls30 (>= 3.7.2), libsasl2-2 (>= 2.1.27+dfsg2) Recommends: libldap-common Conflicts: ldap-utils (<= 2.1.23-1) Replaces: libldap-2.3-0, libldap2 Homepage: https://www.openldap.org/ Task: server-minimal, print-server, ubuntu-desktop-minimal, lamp-server, samba-server, ubuntu-desktop, cloud-image, postgresql-server, ubuntu-desktop-raspi, ubuntu-wsl, mail-server, server, ubuntu-server-raspi, kubuntu-desktop, xubuntu-core, xubuntu-desktop, lubuntu-desktop, ubuntustudio-desktop-core, ubuntustudio-desktop, ubuntukylin-desktop, ubuntu-mate-core, ubuntu-mate-desktop, ubuntu-budgie-desktop, ubuntu-budgie-desktop-raspi Download-Size: 183 kB APT-Sources: http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages Description: OpenLDAP libraries These are the run-time libraries for the OpenLDAP (Lightweight Directory Access Protocol) servers and clients. Package: libldap-2.5-0 Version: 2.5.11+dfsg-1~exp1ubuntu3 Priority: optional Section: libs Source: openldap Origin: Ubuntu Maintainer: Ubuntu Developers <ubuntu-devel-discuss(a)lists.ubuntu.com> Original-Maintainer: Debian OpenLDAP Maintainers <pkg-openldap-devel(a)lists.alioth.debian.org> Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 573 kB Depends: libc6 (>= 2.34), libgnutls30 (>= 3.7.2), libsasl2-2 (>= 2.1.27+dfsg2) Recommends: libldap-common Conflicts: ldap-utils (<= 2.1.23-1) Replaces: libldap-2.3-0, libldap2 Homepage: https://www.openldap.org/ Task: server-minimal, print-server, ubuntu-desktop-minimal, lamp-server, samba-server, ubuntu-desktop, cloud-image, postgresql-server, ubuntu-desktop-raspi, ubuntu-wsl, mail-server, server, ubuntu-server-raspi, kubuntu-desktop, xubuntu-core, xubuntu-desktop, lubuntu-desktop, ubuntustudio-desktop-core, ubuntustudio-desktop, ubuntukylin-desktop, ubuntu-mate-core, ubuntu-mate-desktop, ubuntu-budgie-desktop, ubuntu-budgie-desktop-raspi Download-Size: 184 kB APT-Sources: http://mirror.arizona.edu/ubuntu jammy/main amd64 Packages Description: OpenLDAP libraries These are the run-time libraries for the OpenLDAP (Lightweight Directory Access Protocol) servers and clients. -- You are receiving this mail because: You are on the CC list for the issue.

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openldap-bugs July 2024