PH40783: IBM MQ:IMPROVE THE HANDLING OF INVALID BUFFER ADDRESS/LENGTH FOR GETS FROM AMS PROTECTED QUEUES

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An MQGET from a non-AMS protected queue with an invalid  buffer
  address will result in the get failing with MQRC_BUFFER_ERROR.
  Doing the same get from an AMS protected queue results in an
  0C4-04 abend in CSQ0CGET as below:
  ABN=0C4-00000004,U=        ,C=MQ900.920.    -UNKNOWN ,M=UNKNOWN
  ,LOC=CSQ0GPLM.CSQ0CGET
  

Local fix

• Application should provide  correct buffer address and buffer
  length.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM MQ for z/OS Version 9       *
  *                 Release 1 Modification 0, Release 2          *
  *                 Modification 0 and Release 3 Modification 0. *
  ****************************************************************
  * PROBLEM DESCRIPTION: When doing an MQGET from an Advanced    *
  *                      Message Security (AMS) protected        *
  *                      queue with an invalid Buffer and        *
  *                      BufferLength combination , the request  *
  *                      fails and an 0C4-04 abend occurs.       *
  ****************************************************************
  The code responsible for copying data to a user buffer does not
  handle invalid Buffer and BufferLength parameters from MQGET
  calls.
  

Problem conclusion

• Error handling improvements have been made to catch the abend,
  return MQRC_BUFFER_ERROR to the user and possibly put the
  message to the AMS error handling queue.
  

Temporary fix

Comments

APAR Information

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

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

  UI81007 UI81008 UI81896

Modules/Macros

• CSQ0CGET CSQ0IPRH CSQ0KRPT CSQ0KRUP
  

Fix information

• Fixed component name

  IBM MQ Z/OS V9

• Fixed component ID

  5655MQ900

Applicable component levels

• R100 PSY UI81008

     UP22/07/01 P F206

• R200 PSY UI81007

     UP22/07/01 P F206

• R300 PSY UI81896

     UP22/09/17 P F209 ¢

Fix is available

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