https://bugs.openldap.org/show_bug.cgi?id=9278
Issue ID: 9278
Summary: liblmdb: robust mutexes should not be unmapped
Product: LMDB
Version: unspecified
Hardware: All
OS: FreeBSD
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: liblmdb
Assignee: bugs(a)openldap.org
Reporter: delphij(a)freebsd.org
Target Milestone: ---
Created attachment 736
--> https://bugs.openldap.org/attachment.cgi?id=736&action=edit
A possible workaround
We recently noticed that lmdb would have the memory region containing the
robust mutex unmapped on mdb_env_close0():
munmap((void *)env->me_txns,
(env->me_maxreaders-1)*sizeof(MDB_reader)+sizeof(MDB_txninfo));
Note that if this is the last unmap for a robust mutex, the FreeBSD
implementation would garbage-collect the mutex, making it no longer visible to
other processes. As the result, a second instance of the attached test.c (from
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244493 with minor changes)
would trigger the assertion at mdb_txn_begin() because the acquisition of the
mutex would return 22 (EINVAL), because the mutex appeared to be a robust
mutex, but was invalid.
The attached lmdb.diff is a possible workaround for this (it would skip
unmapping when setting up the robust mutex for the first time).
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https://bugs.openldap.org/show_bug.cgi?id=9528
Issue ID: 9528
Summary: liblmdb throws away environment CFLAGS
Product: LMDB
Version: 0.9.29
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: liblmdb
Assignee: bugs(a)openldap.org
Reporter: quanah(a)openldap.org
Target Milestone: ---
When building LMDB, specified hardening flags are thrown away due to the
Makefile overriding CFLAGS:
Makefile:CFLAGS = $(THREADS) $(OPT) $(W) $(XCFLAGS)
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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
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https://bugs.openldap.org/show_bug.cgi?id=9736
Issue ID: 9736
Summary: pwrite bug in OSX breaking LMDB promise about the
maximum value size
Product: LMDB
Version: unspecified
Hardware: All
OS: Mac OS
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: liblmdb
Assignee: bugs(a)openldap.org
Reporter: renault.cle(a)gmail.com
Target Milestone: ---
Hi,
I was working with LMDB and found an issue when trying to write a value of
approximately 3.3GiB in the database, I dive into the LMDB source code of the
mdb_put method using the lldb debugger and found out that it was not related to
an issue in LMDB itself but rather a bug in the pwrite function of the Mac OS
libc implementation.
The pwrite function is given four parameters, the file descriptor, the buffer,
the count of bytes to write from the buffer and, the offset of where to write
it in the file. On Mac OS the count of bytes is a size_t that must be a 64bits
unsigned integer but when you call pwrite with a number bigger or equal to 2^31
it returns an error 22 (invalid argument). LMDB was returning a 22 error from
the mdb_put call and not an EINVAL because the error was cause by an internal
issue and not something catchable by LMDB.
I am not sure about what we can do, can we implement this single pwrite [1] as
multiple pwrite with counts smaller than 2^31 in a loop, just for Mac OS? Like
for Windows where we do specific things for this operating system too?
I also found this issue on the RocksDB repository [2] about a similar problem
they have with pwrite and write on Mac OS it seems. I understand that this is
not a real promise that LMDB is specifying but rather an "in theory" rule [3].
Thank you for your time,
kero
[1]:
https://github.com/LMDB/lmdb/blob/01b1b7dc204abdf3849536979205dc9e3a0e3ece/…
[2]: https://github.com/facebook/rocksdb/issues/5169
[3]: http://www.lmdb.tech/doc/group__mdb.html#structMDB__val
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https://bugs.openldap.org/show_bug.cgi?id=9596
Issue ID: 9596
Summary: Python test suite
Product: OpenLDAP
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: build
Assignee: bugs(a)openldap.org
Reporter: ondra(a)mistotebe.net
Target Milestone: ---
The bash test suite is extremely limited, hard to write for and slow. We can't
lose it as it is also portable, but something should be introduced for
developers/CI on more modern systems and increase coverage.
A Python 3 seed for one is in development in MR!347.
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https://bugs.openldap.org/show_bug.cgi?id=9398
Issue ID: 9398
Summary: Stale accesslog cookie due to unclean shutdown
Product: OpenLDAP
Version: 2.4.56
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: slapd
Assignee: bugs(a)openldap.org
Reporter: quanah(a)openldap.org
Target Milestone: ---
If slapd terminates uncleanly, a checkpoint will be lost on the accesslog db.
Depending on the syncprov overlay checkpoint settings (usually no checkpointing
is enabled on the accesslog db) this can cause the system to refuse engage in
replication at startup.
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https://bugs.openldap.org/show_bug.cgi?id=9717
Issue ID: 9717
Summary: The RADIUSOV overlay can be incorporated into OpenLDAP
Product: OpenLDAP
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Keywords: needs_review
Severity: normal
Priority: ---
Component: contrib
Assignee: bugs(a)openldap.org
Reporter: rdubner(a)symas.com
Target Milestone: ---
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https://bugs.openldap.org/show_bug.cgi?id=9513
Issue ID: 9513
Summary: Enhanced debug output
Product: OpenLDAP
Version: 2.5
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: enhancement
Priority: ---
Component: slapd
Assignee: bugs(a)openldap.org
Reporter: hyc(a)openldap.org
Target Milestone: ---
While debugging ITS#9479 I needed more information on which threads were doing
what actions. Also, when looking for delays/hangs/race conditions, the 1-second
granularity of the debug msg timestamp was inadequate. And also, some of the
debug output for the Search operation was being done in separate Debug calls
for a single line of output. This gets jumbled up pretty badly if other threads
are printing output as well.
New patch set will extend the debug timestamp to have fractional seconds too;
it will use clock_gettime for nanosecond resolution if available, otherwise use
gettimeofday for microsecond resolution. Also tweak the Search debug output to
only use one Debug invocation per line of output.
This is MR!279.
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https://bugs.openldap.org/show_bug.cgi?id=9584
Issue ID: 9584
Summary: cn=config replication ops/refresh should pause server
Product: OpenLDAP
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: ---
Component: slapd
Assignee: bugs(a)openldap.org
Reporter: ondra(a)mistotebe.net
Target Milestone: ---
Looking into this crash: https://git.openldap.org/openldap/openldap/-/jobs/7286
The thread in question is running a plain syncrepl refresh while another thread
seems to have done the same. This thread fetched the entryUUID attribute of the
'cn=config' entry as 'a' and in the meantime, that entry has been rewritten,
with 'a' presumably cleaned up and returned to the pool, so addressing
a->a_nvals[0] is a NULL-dereference now.
This might or might not be related to the fix in ITS#8102.
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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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