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Re: (ITS#6021) slapo-pcache/back-ldap slapd crashes
by toby＠inf.ed.ac.uk 17 Mar '09

17 Mar '09

> I did my best to reproduce your setup, but I got no crashes. One > thing I'd like to ask is: I see some non-standard attributes in the > pcache configuration. Can you tell whether there might occur some > schema inconsistencies between the remote server and the proxy? No, they're the same - the schema files are distributed via RPM and configured in slapd.conf with the same bit of configuration code. > Also, can you tell how often crashes occur, or any detail about the > type of operation, the workload and so? The machines I'm currently testing with are all in a student lab, running condor jobs when quiet, so a bit difficult to predict - I haven't seen any discernible pattern so far - I've seen crashes on busy machines and quiet ones. For the core file we're looking at here, this machine had answered 9 queries in the second prior to the crash, but had been quiet for 3 minutes prior to that after it had removed stale entries from the cache. I can attach a portion of the slapd log if it would be useful. As for how often the crashes occur, these 24 lab machines have been running 2.4.15 built with no optimisation since 27th Feb and have produced 18 core files in that time. Of these, approximately half have been assertion failures for free(p) in memory.c:152. I've seen 3 cases of segfaults in pcache_filter_cmp, as mentioned in ITS#5756, but I'll submit non-optimised backtraces to that ticket, rather than confuse the issue here. > I also disabled slab allocation, so that true mallocs occur all > times, and valgrind is not showing any memory issue. The difficulty is in trying to reproduce this - my own desktop machine is running with the same setup and has never crashed, despite my best efforts. Cheers Toby -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

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Re: (ITS#6027) Debug() accesses free()-d memory in register_at() on error
by hyc＠symas.com 17 Mar '09

17 Mar '09

ando(a)sys-net.it wrote: > test.007(a)seznam.cz wrote: >> Full_Name: Test Seven >> Version: 2.4.15 >> OS: Windows >> URL: >> Submission from: (NULL) (195.39.55.20) > > Fixed in HEAD, please test. Thanks, p. The fix looks fine, but I was unable to reproduce the original error. It seems their build is broken. -- -- 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#6027) Debug() accesses free()-d memory in register_at() on error
by ando＠sys-net.it 17 Mar '09

17 Mar '09

test.007(a)seznam.cz wrote: > Full_Name: Test Seven > Version: 2.4.15 > OS: Windows > URL: > Submission from: (NULL) (195.39.55.20) Fixed in HEAD, please test. Thanks, p. Ing. Pierangelo Masarati OpenLDAP Core Team SysNet s.r.l. via Dossi, 8 - 27100 Pavia - ITALIA http://www.sys-net.it ----------------------------------- Office: +39 02 23998309 Mobile: +39 333 4963172 Fax: +39 0382 476497 Email: ando(a)sys-net.it -----------------------------------

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(ITS#6027) Debug() accesses free()-d memory in register_at() on error
by test.007＠seznam.cz 17 Mar '09

17 Mar '09

Full_Name: Test Seven Version: 2.4.15 OS: Windows URL: Submission from: (NULL) (195.39.55.20) http://www.openldap.org/devel/cvsweb.cgi/~checkout~/servers/slapd/at.c?rev=… ldap_attributetype_free( at ); Debug( LDAP_DEBUG_ANY, "register_at: AttributeType \"%s\": %s, %s\n", def, scherr2str(code), err ); You should swap the lines, because ``err'' points inside ``at''. How to reproduce: Compile Debug version with LDAP_DEBUG e.g. with MSVC 2005. Don't configure it slapd.exe -d9 Output: register_at: AttributeType "( OLcfgDbAt:0.1 NAME 'olcDbDirectory' DESC 'Director y for database content' EQUALITY caseIgnoreMatch SYNTAX OMsDirectoryString SINGL E-VALUE )": OID could not be expanded, ŢŢŢŢŢŢŢŢŢŢŢŢŢŢŢŢŢŢ

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Re: (ITS#6018) TLS memory leak
by timling2003＠gmail.com 16 Mar '09

16 Mar '09

I tested it again and found that there is not memory leak on gcc 4.1.2 and openssl 0.9.8c. The leak version is on gcc 3.3.5 and OpenSSL 0.9.7d. So, it may be not a bug of openLDAP but the other old version software.

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Re: (ITS#6021) slapo-pcache/back-ldap slapd crashes
by ando＠sys-net.it 16 Mar '09

16 Mar '09

toby(a)inf.ed.ac.uk wrote: > On 14 Mar 2009, at 15:49, Pierangelo Masarati wrote: > > Hello, > > Thanks for your quick reply. > >>> (gdb) bt >>> #0 0x00b8d402 in __kernel_vsyscall () >>> #1 0x009e8d20 in raise () from /lib/libc.so.6 >>> #2 0x009ea631 in abort () from /lib/libc.so.6 >>> #3 0x00a20e6b in __libc_message () from /lib/libc.so.6 >>> #4 0x00a28b16 in _int_free () from /lib/libc.so.6 >>> #5 0x00a2c070 in free () from /lib/libc.so.6 >>> #6 0x081d5746 in ber_memfree_x (p=0xa6809478, ctx=0x0) at memory.c: >>> 152 >>> #7 0x081d630c in ber_bvarray_free_x (a=0x9049bb8, ctx=0x0) at >>> memory.c:731 >>> #8 0x081d6343 in ber_bvarray_free (a=0x9049bb8) at memory.c:741 >>> #9 0x08079757 in attr_clean (a=0xb62d41bc) at attr.c:134 >> The problem seems to be here; apparently, the a->a_nvals array is >> being incorrectly freed. If you have those core files around, it >> would be interesting to see the contents of those attributes, e.g. >> >> p *a >> p a->a_desc[0] >> p a->a_flags >> p a->a_nvals[0] >> >> from within frame 9. > > > (gdb) up > #9 0x08079757 in attr_clean (a=0xb62d41bc) at attr.c:134 > 134 ber_bvarray_free( a->a_nvals ); > (gdb) p *a > $1 = {a_desc = 0x8faa150, a_vals = 0x90487f0, a_nvals = 0x9049bb8, > a_numvals = 631, a_flags = 0, a_next = 0x0} > (gdb) p a->a_desc[0] > $2 = {ad_next = 0x0, ad_type = 0x8fbba20, ad_cname = {bv_len = 9, > bv_val = 0x8fba5d8 "memberUid"}, ad_tags = {bv_len = 0, bv_val = > 0x0}, > ad_flags = 0} > (gdb) p a->a_flags > $3 = 0 > (gdb) p a->a_nvals[0] > $4 = {bv_len = 8, bv_val = 0x905aac0 "v1ggoodh"} > (gdb) > > >>> #10 0x0807983b in attrs_free (a=0xb62d41bc) at attr.c:196 >>> #11 0x0807c059 in entry_clean (e=0xb5acfdbc) at entry.c:504 >>> #12 0x0811ec17 in ldap_back_search (op=0xa680e5d8, rs=0xb5ad10e0) >>> at search.c:354 >> Also, it would be interesting to see the parameters of the search; >> e.g. >> >> p op->o_req_ndn >> p op->o_request.oq_search >> p op->o_request.oq_search.rs_filterstr >> p op->o_request.oq_search.rs_attrs[0] (unless NULL) >> >> from within frame 12 > > > (gdb) up > #12 0x0811ec17 in ldap_back_search (op=0xa680e5d8, rs=0xb5ad10e0) > at search.c:354 > 354 entry_clean( &ent ); > (gdb) p op->o_req_ndn > $5 = {bv_len = 24, bv_val = 0xb44ce1e4 "dc=inf,dc=ed,dc=ac,dc=uk"} > (gdb) p op->o_request.oq_search > $6 = {rs_scope = 2, rs_deref = 0, rs_slimit = 24576, rs_tlimit = 3600, > rs_limit = 0x8fa88b8, rs_attrsonly = 0, rs_attrs = 0xb44ce904, > rs_filter = 0xb44ce86c, rs_filterstr = {bv_len = 112, > bv_val = 0xb44ce87c "(&(objectClass=posixGroup)(| > (memberUid=vlavrenk) > (uniqueMember=uid=vlavrenk,ou=people,dc=inf,dc=ed,dc=ac,dc=uk)))"}} > (gdb) p op->o_request.oq_search.rs_filterstr > $7 = {bv_len = 112, > bv_val = 0xb44ce87c "(&(objectClass=posixGroup)(| > (memberUid=vlavrenk) > (uniqueMember=uid=vlavrenk,ou=people,dc=inf,dc=ed,dc=ac,dc=uk)))"} > (gdb) p op->o_request.oq_search.rs_attrs[0] > $8 = {an_name = {bv_len = 9, bv_val = 0x907b012 "gidNumber"}, > an_desc = 0x8f85930, an_oc_exclude = 0, an_oc = 0x0} > (gdb) > > >> Finally, it would be great to see your slapd.conf. > > > No problem, this is the database, back-ldap, pcache part of it: > > database ldap > suffix dc=inf,dc=ed,dc=ac,dc=uk > rootdn uid=ldaprep/ > hostname.inf.ed.ac.uk,cn=inf.ed.ac.uk,cn=gssapi,cn=auth > uri "ldap://server1.inf.ed.ac.uk/,ldap:// > server2.inf.ed.ac.uk" > idassert-bind mode=none > bindmethod=sasl > saslmech=GSSAPI > idassert-authzFrom "dn:*" > > overlay pcache > > proxycache bdb 5000 4 500 300 > proxycachequeries 10000 > > proxyattrset 0 cn userPassword memberUid uniqueMember > gidNumber > proxyattrset 1 uid userPassword uidNumber gidNumber cn > homeDirectory > loginShell gecos description objectClass afsHomeDirectory primaryRoles > secondary > Roles > proxyattrset 2 cn nisNetgroupTriple memberNisNetgroup > proxyattrset 3 "*" > > proxytemplate (uid=) 1 1800 1800 > proxytemplate (&(objectClass=)(uid=)) 1 1800 1800 > proxytemplate (&(objectClass=)(cn=)) 0 1800 1800 > proxytemplate (&(objectClass=)(cn=)) 2 1800 1800 > proxytemplate (&(objectClass=)(|(memberUid=) > (uniqueMember=))) 0 1800 1800 > proxytemplate (&(objectClass=)(uniqueMember=)) 0 1800 1800 > proxytemplate (&(objectClass=)(memberUid=)) 0 1800 1800 > proxytemplate (&(objectClass=)(uidNumber=)) 1 1800 1800 > proxytemplate (&(objectClass=)(gidNumber=)) 0 1800 1800 > proxytemplate (&(objectClass=)(amdmapName=)(amdmapKey=)) 3 > 1800 1800 > proxytemplate (&(objectClass=)(uid=)) 3 1800 1800 > > directory /var/openldap-data > > checkpoint 128 60 > cachesize 10000 > idlcachesize 10000 > > dbconfig set_cachesize 0 16777216 1 > dbconfig set_lg_regionmax 262144 > dbconfig set_lg_bsize 2097152 > > > If there's anything else that would be useful, let me know. As I > mentioned, I have a number of other core files, including some that > look the same as this one. I did my best to reproduce your setup, but I got no crashes. One thing I'd like to ask is: I see some non-standard attributes in the pcache configuration. Can you tell whether there might occur some schema inconsistencies between the remote server and the proxy? Also, can you tell how often crashes occur, or any detail about the type of operation, the workload and so? I also disabled slab allocation, so that true mallocs occur all times, and valgrind is not showing any memory issue. p. Ing. Pierangelo Masarati OpenLDAP Core Team SysNet s.r.l. via Dossi, 8 - 27100 Pavia - ITALIA http://www.sys-net.it ----------------------------------- Office: +39 02 23998309 Mobile: +39 333 4963172 Fax: +39 0382 476497 Email: ando(a)sys-net.it -----------------------------------

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Re: (ITS#6021) slapo-pcache/back-ldap slapd crashes
by toby＠inf.ed.ac.uk 16 Mar '09

16 Mar '09

On 14 Mar 2009, at 15:49, Pierangelo Masarati wrote: Hello, Thanks for your quick reply. >> (gdb) bt >> #0 0x00b8d402 in __kernel_vsyscall () >> #1 0x009e8d20 in raise () from /lib/libc.so.6 >> #2 0x009ea631 in abort () from /lib/libc.so.6 >> #3 0x00a20e6b in __libc_message () from /lib/libc.so.6 >> #4 0x00a28b16 in _int_free () from /lib/libc.so.6 >> #5 0x00a2c070 in free () from /lib/libc.so.6 >> #6 0x081d5746 in ber_memfree_x (p=0xa6809478, ctx=0x0) at memory.c: >> 152 >> #7 0x081d630c in ber_bvarray_free_x (a=0x9049bb8, ctx=0x0) at >> memory.c:731 >> #8 0x081d6343 in ber_bvarray_free (a=0x9049bb8) at memory.c:741 >> #9 0x08079757 in attr_clean (a=0xb62d41bc) at attr.c:134 > > The problem seems to be here; apparently, the a->a_nvals array is > being incorrectly freed. If you have those core files around, it > would be interesting to see the contents of those attributes, e.g. > > p *a > p a->a_desc[0] > p a->a_flags > p a->a_nvals[0] > > from within frame 9. (gdb) up #9 0x08079757 in attr_clean (a=0xb62d41bc) at attr.c:134 134 ber_bvarray_free( a->a_nvals ); (gdb) p *a $1 = {a_desc = 0x8faa150, a_vals = 0x90487f0, a_nvals = 0x9049bb8, a_numvals = 631, a_flags = 0, a_next = 0x0} (gdb) p a->a_desc[0] $2 = {ad_next = 0x0, ad_type = 0x8fbba20, ad_cname = {bv_len = 9, bv_val = 0x8fba5d8 "memberUid"}, ad_tags = {bv_len = 0, bv_val = 0x0}, ad_flags = 0} (gdb) p a->a_flags $3 = 0 (gdb) p a->a_nvals[0] $4 = {bv_len = 8, bv_val = 0x905aac0 "v1ggoodh"} (gdb) >> #10 0x0807983b in attrs_free (a=0xb62d41bc) at attr.c:196 >> #11 0x0807c059 in entry_clean (e=0xb5acfdbc) at entry.c:504 >> #12 0x0811ec17 in ldap_back_search (op=0xa680e5d8, rs=0xb5ad10e0) >> at search.c:354 > > Also, it would be interesting to see the parameters of the search; > e.g. > > p op->o_req_ndn > p op->o_request.oq_search > p op->o_request.oq_search.rs_filterstr > p op->o_request.oq_search.rs_attrs[0] (unless NULL) > > from within frame 12 (gdb) up #12 0x0811ec17 in ldap_back_search (op=0xa680e5d8, rs=0xb5ad10e0) at search.c:354 354 entry_clean( &ent ); (gdb) p op->o_req_ndn $5 = {bv_len = 24, bv_val = 0xb44ce1e4 "dc=inf,dc=ed,dc=ac,dc=uk"} (gdb) p op->o_request.oq_search $6 = {rs_scope = 2, rs_deref = 0, rs_slimit = 24576, rs_tlimit = 3600, rs_limit = 0x8fa88b8, rs_attrsonly = 0, rs_attrs = 0xb44ce904, rs_filter = 0xb44ce86c, rs_filterstr = {bv_len = 112, bv_val = 0xb44ce87c "(&(objectClass=posixGroup)(| (memberUid=vlavrenk) (uniqueMember=uid=vlavrenk,ou=people,dc=inf,dc=ed,dc=ac,dc=uk)))"}} (gdb) p op->o_request.oq_search.rs_filterstr $7 = {bv_len = 112, bv_val = 0xb44ce87c "(&(objectClass=posixGroup)(| (memberUid=vlavrenk) (uniqueMember=uid=vlavrenk,ou=people,dc=inf,dc=ed,dc=ac,dc=uk)))"} (gdb) p op->o_request.oq_search.rs_attrs[0] $8 = {an_name = {bv_len = 9, bv_val = 0x907b012 "gidNumber"}, an_desc = 0x8f85930, an_oc_exclude = 0, an_oc = 0x0} (gdb) > Finally, it would be great to see your slapd.conf. No problem, this is the database, back-ldap, pcache part of it: database ldap suffix dc=inf,dc=ed,dc=ac,dc=uk rootdn uid=ldaprep/ hostname.inf.ed.ac.uk,cn=inf.ed.ac.uk,cn=gssapi,cn=auth uri "ldap://server1.inf.ed.ac.uk/,ldap:// server2.inf.ed.ac.uk" idassert-bind mode=none bindmethod=sasl saslmech=GSSAPI idassert-authzFrom "dn:*" overlay pcache proxycache bdb 5000 4 500 300 proxycachequeries 10000 proxyattrset 0 cn userPassword memberUid uniqueMember gidNumber proxyattrset 1 uid userPassword uidNumber gidNumber cn homeDirectory loginShell gecos description objectClass afsHomeDirectory primaryRoles secondary Roles proxyattrset 2 cn nisNetgroupTriple memberNisNetgroup proxyattrset 3 "*" proxytemplate (uid=) 1 1800 1800 proxytemplate (&(objectClass=)(uid=)) 1 1800 1800 proxytemplate (&(objectClass=)(cn=)) 0 1800 1800 proxytemplate (&(objectClass=)(cn=)) 2 1800 1800 proxytemplate (&(objectClass=)(|(memberUid=) (uniqueMember=))) 0 1800 1800 proxytemplate (&(objectClass=)(uniqueMember=)) 0 1800 1800 proxytemplate (&(objectClass=)(memberUid=)) 0 1800 1800 proxytemplate (&(objectClass=)(uidNumber=)) 1 1800 1800 proxytemplate (&(objectClass=)(gidNumber=)) 0 1800 1800 proxytemplate (&(objectClass=)(amdmapName=)(amdmapKey=)) 3 1800 1800 proxytemplate (&(objectClass=)(uid=)) 3 1800 1800 directory /var/openldap-data checkpoint 128 60 cachesize 10000 idlcachesize 10000 dbconfig set_cachesize 0 16777216 1 dbconfig set_lg_regionmax 262144 dbconfig set_lg_bsize 2097152 If there's anything else that would be useful, let me know. As I mentioned, I have a number of other core files, including some that look the same as this one. Cheers Toby -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.

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ITS#6019
by puzon＠eska.pl 16 Mar '09

16 Mar '09

(15:07:44 <~>) 0 # gdb GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-marcel-freebsd". (gdb) file ldapsearch Reading symbols from ldapsearch...(no debugging symbols found)...done. (gdb) run -x -W -D 'cn=Manager,dc=eska' -b "" -s base Starting program: /usr/local/bin/ldapsearch -x -W -D 'cn=Manager,dc=eska' -b "" -s base (no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...(no debugging symbols found)...Enter LDAP Password: # extended LDIF # # LDAPv3 # base <> with scope baseObject # filter: (objectclass=*) # requesting: ALL # # dn: objectClass: top objectClass: OpenLDAProotDSE # search result search: 2 result: 0 Success # numResponses: 2 # numEntries: 1 Program received signal SIGSEGV, Segmentation fault. 0x282eb3f0 in free () from /lib/libc.so.7

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(ITS#6026) Don't run autosaved test scripts
by rein＠OpenLDAP.org 16 Mar '09

16 Mar '09

Full_Name: Rein Tollevik Version: CVS HEAD OS: Irrelevant URL: Submission from: (NULL) (81.93.160.250) Submitted by: rein When running the entire test suite it happily includes autosaved versions of the test scripts. Which can be a bit annoying if the scripts are edited with an editor that loves to leave autosave files around.. A fix is coming. Rein Tollevik Basefarm AS

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Re: (ITS#6018) TLS memory leak
by timling2003＠gmail.com 16 Mar '09

16 Mar '09

As you methioned, I move ldap_set_option() with NULL to the main thread. And, I also use libldap_r instead of libldap. A specific handler is really only used in a single thread. In every thread, it always returns NULL, because it is just a test code and it always print "connect ok" while it is running. I think memory leak may happen when the code of openLDAP uses openssl function such as initialize connection in ldap_start_tls_s(). For every thread, there may be some special structures for SSL/TLS which need to be freed after the end of the thread. I find that Windows has a function ldap_stop_tls_s() related to ldap_start_tls_s(). For my software, I want to create processes instead of threads to avoid this problem.

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