[31613] in Kerberos
Re: SEGV in krb5_free_cred_contents
daemon@ATHENA.MIT.EDU (Markus Moeller)
Sat Oct 24 11:11:49 2009
To: kerberos@mit.edu
From: "Markus Moeller" <huaraz@moeller.plus.com>
Date: Sat, 24 Oct 2009 16:10:11 +0100
Message-ID: <hbv5d2$70g$1@ger.gmane.org>
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"Markus Moeller" <huaraz@moeller.plus.com> wrote in message
news:hbup3h$7mf$1@ger.gmane.org...
>
> "Greg Hudson" <ghudson@MIT.EDU> wrote in message
> news:1256220048.23997.307.camel@ray...
>> On Wed, 2009-10-21 at 19:20 -0400, Markus Moeller wrote:
>>> I have an application which creates a cache, stores a ticket and then
>>> destroys the cache, but sometimes I get a SEGV. This is on OpenSolaris
>>> (but
>>> I think the code is the same as the MIT code).
>> [...]
>>> Do I need to check if the cache has credentials before a destroy the
>>> cache
>>> ?
>>
>>>From reading the OpenSolaris and MIT krb5 code for memory ccaches, every
>> entry in the ccache is supposed to have valid credentials; there is no
>> operation which should put the credentials list into a state where one
>> of the entries has ->creds == NULL.
>>
>> Because of optimization, it's hard to tell from your stack trace whether
>> the credentials linked list structure has NULL credentials somehow, or
>> if it's an invalid pointer. Either way, the next question would be what
>> operation caused the credentials structure to get into the invalid
>> state.
>>
>>
>
> I did debug and val is NIL, but I couldn't find yet why. When I change my
> application to use a file cache (e.g. replace MEMORY: with FILE: ) it
> works
> fine.
>
I stepped through my application and the cache entry is modified when I do
an ldap sasl/GSSAPI bind fails (Using the SUN LDAP SDK). I have to check
what happens when it is successful.
Markus
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>
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