Patrick Hunt reassigned ZOOKEEPER-466:

    Assignee: Chris Darroch

> crash on zookeeper_close() when using auth with empty cert
> ----------------------------------------------------------
>                 Key: ZOOKEEPER-466
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-466
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: c client
>    Affects Versions: 3.2.0
>            Reporter: Chris Darroch
>            Assignee: Chris Darroch
>             Fix For: 3.2.1
>         Attachments: ZOOKEEPER-466.patch
> The free_auth_info() function calls deallocate_Buffer(&auth->auth) on every 
> element in the auth list; that function frees any memory pointed to by 
> auth->auth.buff if that field is non-NULL.
> In zoo_add_auth(), when certLen is zero (or cert is NULL), auth.buff is set 
> to 0, but then not assigned to authinfo->auth when auth.buff is NULL.  The 
> result is uninitialized data in auth->auth.buff in free_auth_info(), and 
> potential crashes.
> The attached patch adds a test which attempts to duplicate this error; it 
> works for me but may not always on all systems as it depends on the 
> uninitialized data being non-zero; there's not really a simple way I can see 
> to trigger this in the current test framework.  The patch also fixes the 
> problem, I believe.

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