OA66387: NETVIEW CANZLOG AUTHUSER FIELD VALUE OF *UNKNWN*:MISSING CNMCSSIS FIXES

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• AUTHUSER issue is due to the missing fixes in CNMCSSIS in V6R3.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of Canzlog on IBM Z NetView 6.4.   *
  ****************************************************************
  * PROBLEM DESCRIPTION: The 'AuthUser' and 'AuthGroup' fields   *
  *                      are displayed incorrectly in Canzlog    *
  *                      as:                                     *
  *                      - '*UNKNWN*' for the MVS command echo   *
  *                      message when command is issued from     *
  *                      SDSF.                                   *
  *                      - '+CONSOLE' and '*' for foreign        *
  *                      messages respectively.                  *
  *                      An ABEND0C4 in module CNMCSSIS may      *
  *                      occur during processing of an           *
  *                      MVS message if a parent of the task     *
  *                      issuing the WTO frees up its ACEE       *
  *                      while the message is being processed.   *
  ****************************************************************
  The fixes to part CNMCSSIS for APARs OA48939 and OA49618 are
  missing in IBM Z NetView V6R4.
  In order to gather the authorized user and authorized group
  (shown in Canzlog as AuthUser and AuthGroup, respectively), for
  an MVS message, module CNMCSSIS starts at the current TCB
  (pointed to by PSATOLD) and runs the TCBOTC chain until it
  finds an ACEE pointer in a TCBSENV field. It then retrieves
  the user and group values from that ACEE. If the current TCB
  doesn't have an ACEE pointer in TCBSENV and a TCB other than
  the current TCB (a parent task) frees the storage pointed to
  by its TCBSENV after CNMCSSIS has picked up the address
  but before it retrieves the values, an ABEND0C4 could occur
  when the storage is accessed, if the entire page has been
  released. If the page had not been released, incorrect data
  could be picked up for the authorized user and authorized
  group. Note, however, that this is a very small timing window
  and very unlikely to occur. Also, there is no test in the code
  for foreign messages. Because the authorized user and
  authorized group are not known for foreign messages,
  the code should not use any TCB to retrieve these values.
  It is currently picking up the information for the task
  processing foreign messages, which is in the Console address
  space, the AuthUser value for which is +CONSOLE.
  

Problem conclusion

• Module CNMCSSIS is being changed to access the ASXB pointed to
  by the ASCB for the current address space (when the TCBSENV for
  the current task is zero) instead of the address space that
  issued the WTO being processed, to use the ACEE pointer to
  retrieve the Values of 'AuthUser' and 'AuthGroup' for a MVS
  message being recorded in Canzlog.
  For foreign messages, however, no TCB or ASXB will be
  referenced, and both the 'AuthUser' and 'AuthGroup'
  values will be set to *UNKNWN*.    
  

Temporary fix

Comments

APAR Information

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

  OA65354

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

  UJ95649

Modules/Macros

• CNMCSSIS
  

Fix information

• Fixed component name

  NETVIEW FOR Z/O

• Fixed component ID

  5697NV600

Applicable component levels

• R40B PSY UJ95649

     UP24/07/19 P F407

Fix is available

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