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Date:      Wed, 13 Nov 2002 13:04:26 -0500 (EST)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        Jacques Vidrine <nectar@FreeBSD.org>
Cc:        cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/lib/libpam/modules/pam_krb5 pam_krb5.c
Message-ID:  <Pine.NEB.3.96L.1021113130347.91561H-100000@fledge.watson.org>
In-Reply-To: <200211131746.gADHkF68049244@repoman.freebsd.org>

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Does this fix the 5.0 interaction problems with Kerberos5 PAM, or are
there still issues left?  I've been setting up a box locally to see if I
could figure out the problems, but I can give up if you think things re
fixed :-).



Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Network Associates Laboratories

On Wed, 13 Nov 2002, Jacques Vidrine wrote:

> nectar      2002/11/13 09:46:15 PST
> 
>   Modified files:
>     lib/libpam/modules/pam_krb5 pam_krb5.c 
>   Log:
>   The pam_krb5 module stored a reference to a krb5_ccache structure as
>   PAM module state (created in pam_sm_authenticate and referenced later
>   in pam_sm_setcred and pam_sm_acct_mgmt).  However, the krb5_ccache
>   structure shares some data members with the krb5_context structure
>   that was used in its creation.  Since a new krb5_context is created
>   and destroyed at each PAM entry point, this inevitably caused the
>   krb5_ccache structure to reference free'd memory.
>   
>   Now instead of storing a pointer to the krb5_ccache structure,
>   we store the name of the cache (e.g. `MEMORY:0x123CACHE') in
>   pam_sm_authenticate, and resolve the name in the other entry points.
>   
>   This bug was uncovered by phkmalloc's free'd memory scrubbing.
>   
>   Approved by:    re (jhb)
>   
>   Revision  Changes    Path
>   1.11      +42 -20    src/lib/libpam/modules/pam_krb5/pam_krb5.c
> 


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