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Re: (ITS#7012) Getting a core dump when TLSCertificateFile does not have an argument
- To: openldap-its@OpenLDAP.org
- Subject: Re: (ITS#7012) Getting a core dump when TLSCertificateFile does not have an argument
- From: email@example.com
- Date: Wed, 10 Aug 2011 17:07:08 GMT
- Auto-submitted: auto-generated (OpenLDAP-ITS)
>> No, thanks. The problem is that these specific statements do not
>> prescribe a fixed number of arguments. Moreover, the function that uses
>> the value resets the field when passed a NULL argument. If this behavior
>> needs to be preserved, I have the right fix handy. Otherwise it might
>> need more work.
> To be more specific: slapd's TLS configuration is registered without
> enforcing a specific number of arguments. This check is delegated to the
> underlying calls to ldap_pvt_tls_set_option() performed by
> config_tls_option(). This poses two problems:
> - since the argument of these parameters is ARG_STRING, if no arg is
> passed then ch_strdup() fails
> - fixing this (by skipping ch_strdup() if argc == 1, for example) results
> in calling ldap_pvt_tls_set_option with a NULL value, which is a perfectly
> legitimate value (it means: clear any existing value), but it may not be
> appropriate in this context.
> Please advise whether the right fix is skip ch_strdup(), or enforcing a
> requirement for argc == 2 for TLS-related fields.
I don't remember any particular reason why the argument count was omitted
here. Looking back over release 2.2 I don't see any special provision for
multiple arguments. I.e., it doesn't look like we need to accomodate longer
argument lists here. And I don't see why we would want to NULL out any
existing settings. Sounds like we should just require argc == 2.
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/