PH49256: DFHXS0001 OR DFHXS0002 DUE TO OVERLAY OF XS DOMAIN CONTROL BLOCKS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An EXEC CICS QUERY SECURITY USERID command passed a userid of
  x'4040404040404040' - Eight spaces/blanks.  This command can
  cause an overlay of security domain directory blocks.  Later
  resource checks or attempts to delete the user associated with
  the overlaid directory block will unexpectedly fail.  Messages
  DFHXS0001 or DFHXS0002 may be issued along with system dumps.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All CICS users.                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: EXEC CICS QUERY SECURITY USERID command *
  *                      may cause overlay of security domain    *
  *                      directory blocks when a blank userid    *
  *                      is passed.                              *
  ****************************************************************
  An EXEC CICS QUERY SECURITY USERID command passed a userid of
  X'4040404040404040' - eight spaces/blanks. This command may
  cause an overlay of security domain directory blocks. Later when
  resource checks or attempts to delete the user associated with
  the overlaid directory block, it will unexpectedly fail.
  CICS system abend code DFHXS0001 or DFHXS0002 may be issued
  along with system dumps.
  

Problem conclusion

• CICS has been changed to return USERIDERR to the application and
  not overlay storage when EXEC CICS QUERY SECURITY USERID command
  passed a blank userid.
  

Temporary fix

Comments

APAR Information

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

  PH48687

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

  UI82735

Modules/Macros

• DFHESE
  

Fix information

• Fixed component name

  CICS TS Z/OS V6

• Fixed component ID

  5655YA100

Applicable component levels

• R400 PSY UI82735

     UP22/10/25 P F210

Fix is available

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