back-port r24878 for 1.8-branch

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 r24878 | tlyu | 2011-04-13 14:43:37 -0400 (Wed, 13 Apr 2011) | 11 lines

 ticket: 6899
 tags: pullup
 target_version: 1.9.1

 Fix the sole case in process_chpw_request() where a return could occur
 without allocating the data pointer in the response.  This prevents a
 later free() of an invalid pointer in kill_tcp_or_rpc_connection().

 Also initialize rep->data to NULL in process_chpw_request() and clean
 up *response in dispatch() as an additional precaution.

https://github.com/krb5/krb5/commit/9f0293a1794038489d4764f1b526a9b01e5f8a2a
Commit By: tlyu
Revision: 24880
Changed Files:
U   branches/krb5-1-8/src/kadmin/server/network.c
U   branches/krb5-1-8/src/kadmin/server/schpw.c