RECURSIVE ABENDS DURING TCP/IP SHUTDOWN WITH SSL

 
 PRINT SELECTION FOR APAR - PH13366 19/12/11
 APAR= PH13366  SER=                            AB ABEND
 RECURSIVE ABENDS DURING TCP/IP SHUTDOWN WITH SSL
 
 STAT= CLOSED  PER  FESN0461035-     CTID= EN0313 ISEV= 3
 SB19/06/13  RC19/06/13  CL19/06/21  PD           SEV= 3
                        PE=                       TYPE= F
 RCOMP= 5735FAL00    TCP/IP FOR Z/VM RREL= R710
 FCOMP= 5735FAL00    TCP/IP FOR Z/VM PFREL= F999  TREL= T
 ACTION=             SEC/INT= N                   DUP/
 USPTF= UI63805      PDPTF=                       DUPS 0
 DW19/06/13  RT19/06/13  SC          FT          RE
 PT          UP          LP          PV          AP
 EN          FL          LC19/07/03  RU19/07/03  OT
 CT          FR          TD          TYPE OF SOLUTION=
 PROJECTED CLOSE CODE=        CUST INST LVL/SU=
 FAILING MODULE= TCPSSL       FAILING LVL/SU= 710
 SYSROUTE OF:          RET APAR=             PS=
 STATUS DETAIL= SHIPMENT        RELIEF AVAILABLE=
 COMP OPER ENV=  710
 
              N
 
        N                                        SCP/
 F/                                  TYPE OF SOLUTION=
 PROJECTED CLOSE CODE=        CUST INST LVL/SU=
 FAILING MODULE=              FAILING LVL/SU=
 SYSROUTE OF:          RET APAR=      N      PS=
 STATUS DETAIL=   N N N N N     RELIEF AVAILABLE=
 COMP OPER ENV=
 
 SYSRES=      SYSIN=      SYSOUT=      CPU=             RE-IPL=
 OPTYPE=                 SPECIAL ACTIVITY=          REGRESSION=
 PRE-SCREEN NO.=          RSCP= RS710
 ERROR DESCRIPTION:
 Recursive abends may occur during TCP/IP shutdown when there are
 outstanding SSL handshake requests in progress.
 These abends will be logged in the TCP/IP console log.
 LOCAL FIX:
 N/A
 
 PROBLEM SUMMARY:
 ****************************************************************
 * USERS AFFECTED: All TCP/IP users that secure connections     *
 *                 through the z/VM SSL server.                 *
 ****************************************************************
 * PROBLEM DESCRIPTION:                                         *
 ****************************************************************
 * RECOMMENDATION: APPLY PTF                                    *
 ****************************************************************
 Shutting down the TCP/IP stack while an SSL handshake is in
 progress may cause a recursive abend loop in the stack.
 PROBLEM CONCLUSION:
 Several different abends were reported within the recursive
 abend loop.  This APAR will address the following problems that
 were detected:
 
 - When an SSL handshake fails with an error other than an
   internal TCP/IP error, the handshake is attempted on the
   next available SSL server.  During TCP/IP shutdown, all
   available SSL servers are moved to the Eligible list and
   therefore no SSL servers are available.  The code has
   been updated to detect this condition and fail the
   handshake.
 
 - The SslSend routine sends data from the TCP/IP stack to
   the SSL server.  It has been updated to check that
   the control block address that is passed in is not nil.
   If it is nil, the send fails with a FatalError.
 
 - A check was added to make sure that a handshake request
   is in progress before responding to it.  Updates were
   made to set/reset the handshake in progress flag
   appropriately.
 TEMPORARY FIX:
 COMMENTS:
 MODULES/MACROS:
 CMNETST  TCNOTIF  TCPREQU  TCPSSL   TCUTIL   T6PSSL
 SRLS:
 NONE
 RTN CODES:
 APPLICABLE COMPONENT LEVEL/SU:
 R710 PSY UI63805 UP19/07/03 I      1000
 CIRCUMVENTION:
 MESSAGE TO SUBMITTER: