Re: Segfault on RHEL 6.5 with symas-openldap-silver.x86_64-2.4.39-1.rpm

[Mirko Caserta <mirko.caserta@gmail.com>]

Iâll reply to myself for future reference.

The segfault was triggered by using a combination of:

1) Apache Directory Studio client configured with âGet base DNs from Root DSEâ enabled

2) an empty mdb database bound to the empty suffix (ââ)

As soon as one of the two conditions above is modified, there is no segfault and operation is normal.

Although an empty database is hardly a production condition, maybe a segfault triggered by a search for the empty suffix is something that you might want to investigate, in which case I can provide all the details you might need in order to reproduce the issue.

Thanks, Mirko

On 20 luglio 2014 at 09:49:43, Mirko Caserta (mirko.caserta@gmail.com) wrote:

Hi there,

Iâm experiencing a weird segfault while installing a RHEL 6.5 server with the mdb backend. 

The funny thing is, I have exactly the same configuration (slapd, schema, etc) running just fine on a debian.

slapd starts fine but, as soon as I remotely bind to port 389, it segfaults:

Jul 18 15:53:41 TBM-LDAP01 kernel: slapd[2056]: segfault at c6e8 ip 00007fe8e742d188 sp 00007fe8a5cd6328 error 4 in back_mdb-2.4.so.2.10.2[7fe8e7407000+34000]

Jul 18 15:53:41 TBM-LDAP01 abrtd: Directory 'ccpp-2014-07-18-15:53:41-1717' creation detected

Jul 18 15:53:41 TBM-LDAP01 abrt[2057]: Saved core dump of pid 1717 (/opt/symas/lib64/slapd) to /var/spool/abrt/ccpp-2014-07-18-15:53:41-1717 (37949440 bytes)

Jul 18 15:53:41 TBM-LDAP01 abrtd: Package 'symas-openldap-silver' isn't signed with proper key

Jul 18 15:53:41 TBM-LDAP01 abrtd: 'post-create' on '/var/spool/abrt/ccpp-2014-07-18-15:53:41-1717' exited with 1

Jul 18 15:53:41 TBM-LDAP01 abrtd: Deleting problem directory '/var/spool/abrt/ccpp-2014-07-18-15:53:41-1717â

Here is some more info about the environment:

[root@TBM-LDAP01 ~]# lsb_release -a

LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch

Distributor ID: RedHatEnterpriseServer

Description: Red Hat Enterprise Linux Server release 6.5 (Santiago)

Release: 6.5

Codename: Santiago

[root@TBM-LDAP01 ~]# free

             total       used       free     shared    buffers     cached

Mem:       3924444     240244    3684200          0      15180      80864

-/+ buffers/cache:     144200    3780244

Swap:      8388600          0    8388600

[root@TBM-LDAP01 ~]# df -h

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/vg_bueapweb01-lv_root

                       22G  3.1G   18G  16% /

tmpfs                 1.9G     0  1.9G   0% /dev/shm

/dev/sda1             485M   95M  365M  21% /boot

I understand this is all a bit vague but I can provide core dumps, slapd.conf, anything else your might need to further investigate the problem.

Thank you very much.

Mirko