openldap-bugs February 2020

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435 discussions

Re: (ITS#9162) dbMaxSize property does not as expected
by quanah＠symas.com 03 Feb '20

03 Feb '20

--On Monday, February 3, 2020 9:49 AM +0000 pasumarthivijaykumar(a)gmail.com wrote: > Full_Name: Vijay Kumar > Version: 2.4.48 > OS: windows > URL: ftp://ftp.openldap.org/incoming/ > Submission from: (NULL) (103.204.96.6) Please stop filing ITSes, as you clearly are working with an already broken database. This ITS will be closed. --Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>

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Re: (ITS#8988) Undefined Behavior in slapadd
by hyc＠symas.com 03 Feb '20

03 Feb '20

openldap-technical(a)kolttonen.fi wrote: > This message is in MIME format. The first part should be readable text, > while the remaining parts are likely unreadable without MIME-aware tools. > > ---1463811718-806940296-1580670508=:196090 > Content-Type: text/plain; charset=ISO-8859-15 > Content-Transfer-Encoding: 8BIT > > > Hello, > > On Sat, 8 Jun 2019, hyc(a)symas.com wrote: > >> The gcc/clang folks have their heads up their asses. They've >> deliberately misinterpreted the spec claiming undefined behaviors are >> forbidden, supposedly to enable essential optimizations. Most of which >> only apply to obscure corner cases in compiler benchmark suites, that >> nobody in the real world ever benefits from. > > I realize this thread is very old, but Jeff and the C compiler folks are > right. All C programs that invoke undefined behavior are illegal C > programs and should be fixed. > > Posix threads are well-defined by Posix standards, so calling them > "undefined behaviour" is not a valid argument. No. The POSIX spec is *not* a part of the C spec - yet it is still valid. Which simply proves the point that just because something is not defined in the C spec does not make it invalid. The compiler guys are idiots for taking this position. -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/

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(ITS#9162) dbMaxSize property does not as expected
by pasumarthivijaykumar＠gmail.com 03 Feb '20

03 Feb '20

Full_Name: Vijay Kumar Version: 2.4.48 OS: windows URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (103.204.96.6) if i try to set the value from property, i dont understand from where the value 1406945XXXXXX and getting set. Please check the details mentioned. 1) olcDbMaxSize: 10485760 >mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb" Environment Info Map address: 0000000000000000 Map size: 140694549168128 Page size: 4096 Max pages: 34349255168 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers) >slapd.exe -T add -F ..\slapd.d -l backupContent.ldif 5e37a371 mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a371 backend_startup_one (type=mdb, suffix="o=abc.net"): bi_db_open failed! (87) slap_startup failed 2) olcDbMaxSize: 1048576 >slapd.exe -T add -F ..\slapd.d -l backupContent.ldif 5e37a5ef mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a5ef backend_startup_one (type=mdb, suffix="o=abc.net"): bi_db_open failed! (87) slap_startup failed >mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb" Environment Info Map address: 0000000000000000 Map size: 140694539730944 Page size: 4096 Max pages: 34349252864 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers) 3) olcDbMaxSize: 1024 >slapd.exe -T add -F ..\slapd.d -l backupContent.ldif 5e37a7fd mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a7fd backend_startup_one (type=mdb, suffix="o=abc.net"): bi_db_open failed! (87) slap_startup failed >mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb" Environment Info Map address: 0000000000000000 Map size: 140694538683392 Page size: 4096 Max pages: 34349252608 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers) 5) olcDbMaxSize 10 >slapd.exe -T add -F ..\slapd.d -l backupContent.ldif 5e37a92b mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a92b backend_startup_one (type=mdb, suffix="o=abc.net"): bi_db_open failed! (87) slap_startup failed >mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb" Environment Info Map address: 0000000000000000 Map size: 140694538682378 Page size: 4096 Max pages: 34349252608 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers) 6) olcDbMaxSize 1 >slapd.exe -T add -F ..\slapd.d -l backupContent.ldif 5e37a92b mdb_db_open: database "o=abc.net" cannot be opened: ⁿ (87). Restore from backup! 5e37a92b backend_startup_one (type=mdb, suffix="o=abc.net"): bi_db_open failed! (87) slap_startup failed >mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb" Environment Info Map address: 0000000000000000 Map size: 140694538682369 Page size: 4096 Max pages: 34349252608 Number of pages used: 2 Last transaction ID: 0 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers) 7) olcDbMaxSize not set >mdb_stat.exe -rne "C:\testMaxSize2\mdb\data.mdb" Environment Info Map address: 0000000000000000 Map size: 1048576 Page size: 4096 Max pages: 256 Number of pages used: 254 Last transaction ID: 104 Max readers: 126 Number of readers used: 0 Reader Table Status (no active readers)

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Re: (ITS#8988) Undefined Behavior in slapadd
by openldap-technical＠kolttonen.fi 02 Feb '20

02 Feb '20

This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1463811718-326687762-1580674674=:196994 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 8BIT On Sun, 2 Feb 2020, openldap-technical(a)kolttonen.fi wrote: > I realize this thread is very old, but Jeff and the C compiler folks are > right. All C programs that invoke undefined behavior are illegal C > programs and should be fixed. > > Posix threads are well-defined by Posix standards, so calling them > "undefined behaviour" is not a valid argument. To make it clear that UB in C programs is horrible, let me provide a real world example of UB: Cyrus IMAPD had an unnoticed dormant strcpy() related UB bug for several years. You see, the manual page of strcpy() says that the src and dst strings must not overlap, or else the C program invokes UB. For many years, Cyrus operated correctly even though the src and dst strings *did* overlap in one part of their database code. UB of course allows this behaviour too. The reason was because GNU libc folks had written their strcpy() implementation in such a way that breaking the contract of having non-overlapping strings did not cause any problems. Then, years later, GNU libc folks deciced to optimize (or otherwise change) their strcpy() implementation. Now the new implementation punished all UB invokers, and we saw our Cyrus mailbox database slowly but surely getting corrupted. It is indeed shocking to hear that LMDB implementation invokes UB. GCC and Clang could change their behaviour tomorrow, and LMDB could get corrupted, crash or whatever. And certainly the blame would be on LMDB code, not the compiler writers. Best Regards, Jokke Hämäläinen ---1463811718-326687762-1580674674=:196994--

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Re: (ITS#8988) Undefined Behavior in slapadd
by openldap-technical＠kolttonen.fi 02 Feb '20

02 Feb '20

This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1463811718-806940296-1580670508=:196090 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 8BIT Hello, On Sat, 8 Jun 2019, hyc(a)symas.com wrote: > The gcc/clang folks have their heads up their asses. They've > deliberately misinterpreted the spec claiming undefined behaviors are > forbidden, supposedly to enable essential optimizations. Most of which > only apply to obscure corner cases in compiler benchmark suites, that > nobody in the real world ever benefits from. I realize this thread is very old, but Jeff and the C compiler folks are right. All C programs that invoke undefined behavior are illegal C programs and should be fixed. Posix threads are well-defined by Posix standards, so calling them "undefined behaviour" is not a valid argument. Best regards, Jokke Hämäläinen ---1463811718-806940296-1580670508=:196090--

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openldap-bugs February 2020