Re: mysterious segfault

[Pierangelo Masarati <ando@sys-net.it>]

Jason Dusek wrote:
>   I've added two seemingly innocuous lines to my LDAP
>   configuration:
>
> Index: conf-root/etc/openldap/slapd.d/cn=config/olcDatabase={1}bdb.ldif
> ===================================================================
> --- etc/openldap/slapd.d/cn=config/olcDatabase={1}bdb.ldif	(revision 1444)
> +++ etc/openldap/slapd.d/cn=config/olcDatabase={1}bdb.ldif	(working copy)
> @@ -1,6 +1,9 @@
>  dn: olcDatabase={1}bdb
>  objectClass: olcDatabaseConfig
>  objectClass: olcBdbConfig
> +objectClass: olcSyncProvConfig
> +olcSpCheckpoint: 100 5
> +olcSpSessionlog: 100
>  olcDatabase: {1}bdb
>  olcSuffix: dc=metascopic,dc=com
>  olcAccess: {0}to attrs=userPassword
>
>   However, they cause `slaptest` to segfault on Linux! I'm a
>   little perplexed by this.

How can you tell that the above configuration is correct? 
olcDatabaseConfig and olcSyncProvConfig are both structural 
objectClasses, and thus cannot live in the same entry.  Besides this, 
back-config cannot be considered just a regular database, since data it 
contains triggers specific code execution.  The fact that manually 
hacking database files leads to a segfault is a pity, as this error 
could be better handled (you may file an ITS, for what is worth), but 
the culprit is mucking with files.

>  :; slaptest -F etc/openldap/slapd.d/
>   Segmentation fault
>
>   Removing the lines restores `slaptest` to a state of sanity.

Not a surprise.

p.


Ing. Pierangelo Masarati
OpenLDAP Core Team

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