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[Issue 9037] observing crash in mdb_cursor_put()
by openldap-its＠openldap.org 26 Mar '24

26 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9037 Quanah Gibson-Mount <quanah(a)openldap.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Version|unspecified |0.9.32 Target Milestone|--- |0.9.33 -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9037] observing crash in mdb_cursor_put()
by openldap-its＠openldap.org 26 Mar '24

26 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9037 Quanah Gibson-Mount <quanah(a)openldap.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|TEST |FIXED Assignee|bugs(a)openldap.org |hyc(a)openldap.org --- Comment #38 from Quanah Gibson-Mount <quanah(a)openldap.org> --- RE0.9: • 83dc42c5 by Howard Chu at 2024-03-26T14:52:42+00:00 ITS#9037 mdb_page_search: fix error code when DBI record is missing -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10189] New: Extra `#endif` in `libraries/liblunicode/utbm/utbm.h`
by openldap-its＠openldap.org 26 Mar '24

26 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=10189 Issue ID: 10189 Summary: Extra `#endif` in `libraries/liblunicode/utbm/utbm.h` Product: OpenLDAP Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: libraries Assignee: bugs(a)openldap.org Reporter: annieliu(a)roblox.com Target Milestone: --- In `libraries/liblunicode/utbm/utbm.h` (https://github.com/openldap/openldap/blob/master/libraries/liblunicode/utbm…), only one `#ifndef` macro is defined, but there are two `#endif`s. Wondering if this is a typo? -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 10190] New: Stack space exhaustion on windows due to FD_SETSIZE
by openldap-its＠openldap.org 26 Mar '24

26 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=10190 Issue ID: 10190 Summary: Stack space exhaustion on windows due to FD_SETSIZE Product: OpenLDAP Version: unspecified Hardware: All OS: Windows Status: UNCONFIRMED Keywords: needs_review Severity: normal Priority: --- Component: libraries Assignee: bugs(a)openldap.org Reporter: varunpatil(a)ucla.edu Target Milestone: --- Setting FD_SETSIZE is only effective on Windows and BSD, and is currently set to an unreasonable default of 4096. Each fd_set is initialized with an array of file descriptors of this size; this allocates 8*4096 bytes on 64-bit machines, which quickly exhausts the small stack space on Windows. This patch sets the default to a more reasonable value of 128; the default value on Windows currently is 64. -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9378] New: Crash in mdb_put() / mdb_page_dirty()
by openldap-its＠openldap.org 26 Mar '24

26 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9378 Issue ID: 9378 Summary: Crash in mdb_put() / mdb_page_dirty() Product: LMDB Version: 0.9.26 Hardware: All OS: Linux Status: UNCONFIRMED Severity: normal Priority: --- Component: liblmdb Assignee: bugs(a)openldap.org Reporter: nate(a)kde.org Target Milestone: --- The KDE Baloo file indexer uses lmdb as its database (source code available at https://invent.kde.org/frameworks/baloo). Our most common crash, with over 100 duplicate bug reports, is in lmdb. Here's the bug report tracking it: https://bugs.kde.org/show_bug.cgi?id=389848. The version of lmdb does not seem to matter much. We have bug reports from Arch users with lmdb 0.9.26 as well as bug reports from people using many earlier versions. Here's an example backtrace, taken from https://bugs.kde.org/show_bug.cgi?id=426195: #6 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50 #7 0x00007f3c0bbb9859 in __GI_abort () at abort.c:79 #8 0x00007f3c0b23ba83 in mdb_assert_fail (env=0x55e2ad710600, expr_txt=expr_txt@entry=0x7f3c0b23e02f "rc == 0", func=func@entry=0x7f3c0b23e978 <__func__.7221> "mdb_page_dirty", line=line@entry=2127, file=0x7f3c0b23e010 "mdb.c") at mdb.c:1542 #9 0x00007f3c0b2306d5 in mdb_page_dirty (mp=<optimized out>, txn=0x55e2ad7109f0) at mdb.c:2114 #10 mdb_page_dirty (txn=0x55e2ad7109f0, mp=<optimized out>) at mdb.c:2114 #11 0x00007f3c0b231966 in mdb_page_alloc (num=num@entry=1, mp=mp@entry=0x7f3c0727aee8, mc=<optimized out>) at mdb.c:2308 #12 0x00007f3c0b231ba3 in mdb_page_touch (mc=mc@entry=0x7f3c0727b420) at mdb.c:2495 #13 0x00007f3c0b2337c7 in mdb_cursor_touch (mc=mc@entry=0x7f3c0727b420) at mdb.c:6523 #14 0x00007f3c0b2368f9 in mdb_cursor_put (mc=mc@entry=0x7f3c0727b420, key=key@entry=0x7f3c0727b810, data=data@entry=0x7f3c0727b820, flags=flags@entry=0) at mdb.c:6657 #15 0x00007f3c0b23976b in mdb_put (txn=0x55e2ad7109f0, dbi=5, key=key@entry=0x7f3c0727b810, data=data@entry=0x7f3c0727b820, flags=flags@entry=0) at mdb.c:9022 #16 0x00007f3c0c7124c5 in Baloo::DocumentDB::put (this=this@entry=0x7f3c0727b960, docId=<optimized out>, docId@entry=27041423333263366, list=...) at ./src/engine/documentdb.cpp:79 #17 0x00007f3c0c743da7 in Baloo::WriteTransaction::replaceDocument (this=0x55e2ad7ea340, doc=..., operations=operations@entry=...) at ./src/engine/writetransaction.cpp:232 #18 0x00007f3c0c736b16 in Baloo::Transaction::replaceDocument (this=this@entry=0x7f3c0727bc10, doc=..., operations=operations@entry=...) at ./src/engine/transaction.cpp:295 #19 0x000055e2ac5d6cbc in Baloo::UnindexedFileIndexer::run (this=0x55e2ad79ca20) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qrefcount.h:60 #20 0x00007f3c0c177f82 in QThreadPoolThread::run (this=0x55e2ad717f20) at thread/qthreadpool.cpp:99 #21 0x00007f3c0c1749d2 in QThreadPrivate::start (arg=0x55e2ad717f20) at thread/qthread_unix.cpp:361 #22 0x00007f3c0b29d609 in start_thread (arg=<optimized out>) at pthread_create.c:477 #23 0x00007f3c0bcb6103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9037] observing crash in mdb_cursor_put()
by openldap-its＠openldap.org 26 Mar '24

26 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9037 Howard Chu <hyc(a)openldap.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |TEST --- Comment #37 from Howard Chu <hyc(a)openldap.org> --- Fixed in git -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9037] observing crash in mdb_cursor_put()
by openldap-its＠openldap.org 26 Mar '24

26 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9037 --- Comment #36 from mdufour(a)audiokinetic.com --- This patch does fix the crash in my application repro case as well. We'll integrate it in our next minor release. Thanks much! -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9037] observing crash in mdb_cursor_put()
by openldap-its＠openldap.org 25 Mar '24

25 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9037 --- Comment #35 from Howard Chu <hyc(a)openldap.org> --- (In reply to mdufour from comment #34) > Thanks to the test application, I was able to identify a key missing step in > my description: process2 creates a named database (under a different name) > after dropping the initial one. I can reproduce the crash by inserting the > following lines @ 104: > > E(mdb_txn_begin(env, NULL, 0, &txn)); > E(mdb_dbi_open(txn, "id2", MDB_CREATE, &dbi)); > E(mdb_txn_commit(txn)); OK, that reproduces it. This patch should fix it, please test, thanks: diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c index 13d1aea39e..f0a65d97ab 100644 --- a/libraries/liblmdb/mdb.c +++ b/libraries/liblmdb/mdb.c @@ -6670,7 +6670,7 @@ mdb_page_search(MDB_cursor *mc, MDB_val *key, int flags) MDB_node *leaf = mdb_node_search(&mc2, &mc->mc_dbx->md_name, &exact); if (!exact) - return MDB_NOTFOUND; + return MDB_BAD_DBI; if ((leaf->mn_flags & (F_DUPDATA|F_SUBDATA)) != F_SUBDATA) return MDB_INCOMPATIBLE; /* not a named DB */ rc = mdb_node_read(&mc2, leaf, &data); -- You are receiving this mail because: You are on the CC list for the issue.

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[Issue 9037] observing crash in mdb_cursor_put()
by openldap-its＠openldap.org 23 Mar '24

23 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9037 --- Comment #34 from mdufour(a)audiokinetic.com --- Thanks to the test application, I was able to identify a key missing step in my description: process2 creates a named database (under a different name) after dropping the initial one. I can reproduce the crash by inserting the following lines @ 104: E(mdb_txn_begin(env, NULL, 0, &txn)); E(mdb_dbi_open(txn, "id2", MDB_CREATE, &dbi)); E(mdb_txn_commit(txn)); -- You are receiving this mail because: You are on the CC list for the issue.

1 0

[Issue 9037] observing crash in mdb_cursor_put()
by openldap-its＠openldap.org 22 Mar '24

22 Mar '24

https://bugs.openldap.org/show_bug.cgi?id=9037 --- Comment #33 from Howard Chu <hyc(a)openldap.org> --- (In reply to mdufour from comment #31) > I am able to reproduce the crash in a scenario with two processes accessing > the same LMDB file, where: > > - process1 opens a named database. > - process2 drops this named database. > - process1 writes to the initial named database (using the dbi it was > holding on to) -> this is where we crash. > > It seems that mdb_page_search returns MDB_NOTFOUND because the named > database is gone, leaving mc->mc_pg[0] NULL. Thanks for that info. Unfortunately I still can't reproduce that crash. I've attached the test code I wrote based on your info. It forks off a child to do the process2 actions. You must press RETURN when you're ready for process 1 to proceed. I just get more MDB_NOTFOUND results when process1 tries to write again. -- You are receiving this mail because: You are on the CC list for the issue.

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