PI69534: 0C4 IN DFHDMENS +110 ENF LISTEN EXIT ERROR SMSVSAM EVENT 16/11/10 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A dump is taken with title:
  .
  Dump Title: ENF LISTEN EXIT ERROR,ISSUER=IEFENFSR ... DFHDMENS
  .
  VERBX LOGDATA shows that an 0C4 has occurred in module
  DFHDMENS +x'110'. DFHDMENS is at PTF level UI34515. The 0C4
  occurs while running under an SRB. DFHDMENS is failing on an
  Execute of a MVC instruction, trying to copy data from the ENF
  parm list to the newly GETMAINed area addressed by R7. R2 is
  zeroes but should be the length of the ENF parameter list. R5
  is the ENF event# which is x'2D' or 45 meaning the SMSVSAM
  address space been initialized/reinitialized.
  .
  Additional Symptom(s) Search Keyword(s): KIXREVACC
  init_notify_element IDAENF45 ENF45 Reg2 PI50813
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All CICS users with PI55068 applied.                         *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * A CICS RLS region issues an abend S0C4 in DFHDMENS when the  *
  * SMSVSAM address space is restarted.                          *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * .                                                            *
  ****************************************************************
  Restarting the SMSVSAM address space generates an ENF45 event,
  mapped by the ENF45 DSECT. This is received by CICS in DFHDMENS,
  which copies the ENF45 event into CICS storage. PI55068 modified
  the code in DFHDMENS to find the length of the ENF control block
  at runtime, since this may vary between different z/OS
  maintenance levels, but did not account for different types of
  ENF events encoding their length differently.
  
  DFHDMENS attempts to load the length of the ENF event into
  general register 2. That length is then used as input to a MVC
  instruction to copy the ENF event data into storage owner by
  CICS. When processing an ENF45 event register 2 is loaded
  incorrectly with zeros, leading to a 256 byte MVC instruction.
  
  This results in a storage violation, prefixed by "IDAENF45"
  eyecatcher data. In the reported problem this storage violation
  crossed a page boundary, and produces an S0C4 protection
  exception.
  
  Additional Keywords: 0C4 abend0C4 abendS0C4 abend0E0 0E0
  DFHAP0001 DFHDTST DFHDTDC DETERMINE_FILE_STATISTICS SMSR
  INQUIRE_ACCESS INVALID_ELEMENT PGIS Inquire_program_failure
  

Problem conclusion

• UI34517
  DFHDMENS has been altered to allocate the correct amount of
  storage for the ENF45 control block, and move the correct data
  length.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  PI66989

• APAR is sysrouted TO one or more of the following:

  UI42609

Modules/Macros

• DFHDMENS
  

Fix information

• Fixed component name

  CICS TS Z/OS V5

• Fixed component ID

  5655Y0400

Applicable component levels

• R000 PSY UI42609

     UP16/11/19 P F611 {

Fix is available

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