svn rev #19528: branches/krb5-1-6/ src/lib/krb5/krb/

[tlyu@MIT.EDU]

Commit By: tlyu
Log Message: 
ticket: 5546
version_fixed: 1.6.2

pull up r19526 from trunk

 r19526 at cathode-dark-space:  tlyu | 2007-04-25 17:19:07 -0400
 ticket: new
 target_version: 1.6.2
 tags: pullup
 subject: race condition in referrals fallback
 
 	* src/lib/krb5/krb/gc_frm_kdc.c (krb5_get_cred_from_kdc_opt):
 	During referrals fallback, set *tgts to NULL after freeing.  This
 	avoids returning a pointer to freed memory when the first call to
 	do_traversal() obtains some TGTs and the subsequent
 	krb5_cc_retrieve_cred() of the final-hop TGT succeeds (due to some
 	other thread or process storing that TGT into the ccache), causing
 	second do_traversal() call (which would re-initialize *tgts) to
 	not execute.  Race condition found during KfW-3.2 testing.
 
 




Changed Files:
_U  branches/krb5-1-6/
U   branches/krb5-1-6/src/lib/krb5/krb/gc_frm_kdc.c