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Re: (ITS#8406) LMDB: Assertion 'mc->mc_flags & C_INITIALIZED' with MDB_NEXT after mdb_cursor_del
by hyc＠symas.com 18 Apr '16

18 Apr '16

hyc(a)symas.com wrote: > akyrtzi(a)gmail.com wrote: >> Full_Name: Argyrios Kyrtzidis >> Version: LMDB master >> OS: OSX >> URL: >> Submission from: (NULL) (2601:646:8900:3c89:b9af:5cb2:7292:8835) >> >> >> With latest lmdb source (github mirror: >> 8fff90db7ed1e650395f39f9e8b22673aa74aa2b), there is an assertion hit when >> deleting the cursor and then doing mdb_cursor_get(MDB_NEXT) and 'entering' >> DUPSORT items. >> To demonstrate see below diff which modifies mtest3.c. When run you see this: > > For reference, this bug was exposed by ITS#8321 > b5ce8108e8bb92df00b2d27ef0e37bfe756d3752 > > (But that is not the root cause.) > Fixed now in git mdb.master -- -- 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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Re: (ITS#8406) LMDB: Assertion 'mc->mc_flags & C_INITIALIZED' with MDB_NEXT after mdb_cursor_del
by hyc＠symas.com 18 Apr '16

18 Apr '16

akyrtzi(a)gmail.com wrote: > Full_Name: Argyrios Kyrtzidis > Version: LMDB master > OS: OSX > URL: > Submission from: (NULL) (2601:646:8900:3c89:b9af:5cb2:7292:8835) > > > With latest lmdb source (github mirror: > 8fff90db7ed1e650395f39f9e8b22673aa74aa2b), there is an assertion hit when > deleting the cursor and then doing mdb_cursor_get(MDB_NEXT) and 'entering' > DUPSORT items. > To demonstrate see below diff which modifies mtest3.c. When run you see this: For reference, this bug was exposed by ITS#8321 b5ce8108e8bb92df00b2d27ef0e37bfe756d3752 (But that is not the root cause.) -- -- 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#8406) LMDB: Assertion 'mc->mc_flags & C_INITIALIZED' with MDB_NEXT after mdb_cursor_del
by akyrtzi＠gmail.com 18 Apr '16

18 Apr '16

Full_Name: Argyrios Kyrtzidis Version: LMDB master OS: OSX URL: Submission from: (NULL) (2601:646:8900:3c89:b9af:5cb2:7292:8835) With latest lmdb source (github mirror: 8fff90db7ed1e650395f39f9e8b22673aa74aa2b), there is an assertion hit when deleting the cursor and then doing mdb_cursor_get(MDB_NEXT) and 'entering' DUPSORT items. To demonstrate see below diff which modifies mtest3.c. When run you see this: mdb.c:6424: Assertion 'mc->mc_flags & C_INITIALIZED' failed in mdb_cursor_next() ==== diff --git a/libraries/liblmdb/mtest3.c b/libraries/liblmdb/mtest3.c dedex 73ee6e2..a9eb011 100644 --- a/libraries/liblmdb/mtest3.c +++ b/libraries/liblmdb/mtest3.c @@ -62,6 +62,19 @@ int main(int argc,char * argv[]) data.mv_size = sizeof(sval); data.mv_data = sval; + memset(sval, sizeof(sval), 0); + memset(kval, sizeof(kval), 0); + kval[0] = 1; + mdb_put(txn, dbi, &key, &data, 0); + kval[0] = 2; + mdb_put(txn, dbi, &key, &data, 0); + sval[0] = 1; + mdb_put(txn, dbi, &key, &data, 0); + E(mdb_cursor_open(txn, dbi, &cursor)); + E(mdb_cursor_get(cursor, &key, &data, MDB_NEXT)); + E(mdb_cursor_del(cursor, 0)); + E(mdb_cursor_get(cursor, &key, &data, MDB_NEXT)); // Assertion hit. + printf("Adding %d values\n", count); for (i=0;i<count;i++) { if (!(i & 0x0f))

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(ITS#8404) Fix for an assertion failure when olcDbRewrite is modified on a meta or asyncmeta database
by nivanova＠symas.com 14 Apr '16

14 Apr '16

Full_Name: Nadezhda Ivanova Version: 2.5 OS: Ubuntu 14.04 URL: ftp://ftp.openldap.org/incoming/nadezhda-ivanova-160414.patch Submission from: (NULL) (78.83.54.234) The problem was reproduced when attempting to modify the dynamic configuration of meta and asyncmeta rewrite engine. On a meta database that has rewrite enabled and some rewrite rules configured, execute ldapmodify with the following LDIF: dn: olcMetaSub={0}uri,olcDatabase={1}meta,cn=config replace: olcDbRewrite olcDbRewrite: rewriteEngine "off"

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RE: (ITS#8402) indexing issue
by escriba＠cells.es 13 Apr '16

13 Apr '16

Mail system message that raised the alarm: Reporting-MTA: dns; mail01.xxxx.xx X-Postfix-Queue-ID: 24C5526003F X-Postfix-Sender: rfc822; xxxxx at xxx .xy Arrival-Date: Wed, 13 Apr 2016 16:30:34 +0200 (CEST) Final-Recipient: rfc822; xxxxx @ xxx .xy Original-Recipient: rfc822; xxxxxx at xxx .xy Action: failed Status: 5.1.1 Remote-MTA: dns; mail02.xxxx.xx Diagnostic-Code: smtp; 550 5.1.1 <xxxxxxx at xxx .xy >: Recipient address rejected: User unknown in local recipient table >From my point of view indexing, even if not needed, may never do the queries fail, isn't it? But seems something weird happened. Regards.

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(ITS#8402) indexing issue
by escriba＠cells.es 13 Apr '16

13 Apr '16

Full_Name: Ramon Escriba Version: openldap2-2.4.23-11.3.1.x86_64 OS: openSUSE 11.4 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (84.89.248.48) Hi, well, is not a bug, maybe an strange interaction between openldap & postfix +saslauth. I detected those logs: Apr 13 16:40:42 <myldap> slapd[23125]: <= bdb_equality_candidates: (mailhost) not indexed So I thought, indexing may solve it. "mailhost" user attribute may only have 2 values, mail01 or mail02. Yes, maybe is not the best thing to index, but I did a try. So I added index mailhost eq in slapd.conf. Slaptest ok. Rcldap stop; slapindex; rcldap start. But then, one mail system began to fail. I comment out the index, restarted daemons & works fine again. Saslauthd.conf query: ldap_filter: ( &(uid=%u) (mailhost=mail02) (mActive=1) (objectClass=CourierMailAlias)) Postfix queries: query_filter = ( &(mail=%s) (mailhost=mail02) (mActive=1) (objectClass=CourierMailAlias)) query_filter = ( &(maildrop=%s) (mailhost=mail02) (mActive=1) (objectClass=CourierMailAlias)) Is just for curiosity. What do you thing it may happen? Why indexing mailhost makes the query fail?? I think I miss something important. Regards.

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Re: (ITS#8401) mdb_env_stat crashes if env is not open
by hyc＠symas.com 13 Apr '16

13 Apr '16

gahr(a)gahr.ch wrote: > Full_Name: Pietro Cerutti > Version: lmdb 0.9.18 > OS: FreeBSD > URL: ftp://ftp.openldap.org/incoming/ > Submission from: (NULL) (69.191.176.32) > > > mdb_env_stat crashes is the env was created but not opened. This happens because > mdb_env_stat calls mdb_env_pick_meta, which doesn't check whether the two pages > are NULL before dereferencing them. > > Please note that there is no mention of the fact that the env must have been > opened before calling mdb_env_stat in the documentation [1]. You're not reading carefully. http://symas.com/mdb/doc/group__mdb.html#gaad6be3d8dcd4ea01f8df436f41d158d4 "Before the handle may be used, it must be opened using mdb_env_open()." Closing this ITS. -- -- 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#8401) mdb_env_stat crashes if env is not open
by gahr＠gahr.ch 13 Apr '16

13 Apr '16

Full_Name: Pietro Cerutti Version: lmdb 0.9.18 OS: FreeBSD URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (69.191.176.32) mdb_env_stat crashes is the env was created but not opened. This happens because mdb_env_stat calls mdb_env_pick_meta, which doesn't check whether the two pages are NULL before dereferencing them. Please note that there is no mention of the fact that the env must have been opened before calling mdb_env_stat in the documentation [1]. The proposed patch is to check whether the environment is active before getting the most recent page: --- mdb.c.orig 2016-04-13 10:00:30.084676000 +0000 +"B2B mdb.c 2016-04-13 10:07:32.064085000 +0000 @@ -9432,7 +9432,7 @@ { MDB_meta *meta; - if (env == NULL || arg == NULL) + if (env == NULL || !(env->me_flags & MDB_ENV_ACTIVE) || arg == NULL) return EINVAL; meta = mdb_env_pick_meta(env); [1] http://symas.com/mdb/doc/group__mdb.html#gaf881dca452050efbd434cd16e4bae255

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Re: (ITS#8400) contiguous spaces in middle of DN - translucent overlay proxy
by dsullivan2＠bsd.uchicago.edu 12 Apr '16

12 Apr '16

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Re: (ITS#8400) contiguous spaces in middle of DN - translucent overlay proxy
by hyc＠symas.com 12 Apr '16

12 Apr '16

dsullivan2(a)bsd.uchicago.edu wrote: > Full_Name: Dan Sullivan > Version: 2.4.40-7.el6_7 > OS: RHEL > URL: ftp://ftp.openldap.org/incoming/ > Submission from: (NULL) (205.208.122.230) > > > Hi, > > I am reporting what I believe to be a bug in the translucent overlay proxy. It > appears that two contiguous non-escaped spaces in the middle of a DN will get > sent to the remote server as a single space. For example, if I have the > following record being dumped from the local database using slapcat: This is not a bug. As specified in X.520, multiple consecutive spaces are insignificant. Closing this ITS. > > dn: cn=foo\2C bar [BSD] - HGD,ou=general > accounts,ou=accounts,ou=hgd,dc=somedomain,dc=uchicago,dc=edu > gidNumber: 339792922 > uidNumber:3939798516 > homeDirectory: /home/fbar > sAMAccountName: fbar > objectClass: person > > There are two spaces between bar and [BSD]. If I query LDAP for uidNumber (via > translucent local), the search DN that is passed to the remote server only has > one space in it. Based on my understanding it is acceptable to have any number > of spaces in a DN without escaping them (as long as they are not the first or > the last characters in the field). I verified that only a single space is being > sent to the remote server by doing a packet capture and looking at the actual > LDAP query being sent. > > If it would help to provide configuration, additional logs, or a packet capture > please advise and I can provide this. > > I believe my overlay proxy works fine otherwise. > > Dan > > -- -- 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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