IC64690: Access violation occurs during attempt by c++ application to connect to queue manager. FDC with probe XC130031 is produced.

WebSphere MQ V7.0 Fix Pack 7.0.1.2
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.2

APAR status

• Closed as program error.

Error description

• When a multi-threaded C++ client application connects to the
  queue manager, the connect fails with a 2219
  (MQRC_CALL_IN_PROGRESS) and an FDC with Probe Id XC130031
  and Component xehExceptionHandler is produced.
  The Function Stack shows the following:
  
  MQM Function Stack
  ImqQueueManager::connect
  MQCONNX
  trmzstMQCONNX
  reqDoConnect
  reqConnectChl
  reqFindConvClass
  xcsFFST
  

Local fix

Problem summary

• ****************************************************************
  USERS AFFECTED:
  Any users of WebSphere MQ connecting to the queue manager with
  client-bound applications which provide an MQCD version lower
  than 9.
  
  Platforms affected:
  All Distributed (iSeries, all Unix and Windows)
  ****************************************************************
  PROBLEM SUMMARY:
  The problem was caused by the caching mechanism being used for
  the handling of shared conversations within the MQ client. The
  caching mechanism in use was based on unique MQCD structures
  associated with a particular connection. As a result, when
  adding the MQCD associated with a new connection into the
  cache, MQ was not checking the length of the MQCD passed in and
  was assuming that it was a version 9 MQCD. This would cause a
  buffer overrun of the MQCD to occur, resulting in a read access
  violation.
  

Problem conclusion

• WebSphere MQ was modified to ensure that it does not attempt to
  copy more bytes from the ClientConnPtr provided MQCD than the
  size of the specific version of the MQCD provided.
  
  ---------------------------------------------------------------
  The fix is targeted for delivery in the following PTFs:
  
                     v7.0
  Platform           Fix Pack 7.0.1.2
  --------           --------------------
  Windows            U200316
  AIX                U829807
  HP-UX (PA-RISC)    U829678
  HP-UX (Itanium)    U829681
  Solaris (SPARC)    U829806
  Solaris (x86-64)   U829680
  iSeries            tbc_p700_0_1_2
  Linux (x86)        U829677
  Linux (x86-64)     U829676
  Linux (zSeries)    U829682
  Linux (Power)      U829679
  
  The latest available maintenance can be obtained from
  'WebSphere MQ Recommended Fixes'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037
  
  If the maintenance level is not yet available, information on
  its planned availability can be found in 'WebSphere MQ
  Planned Maintenance Release Dates'
  http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
  ---------------------------------------------------------------
  

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:

Fix information

• Fixed component name

  WMQ WINDOWS V7

• Fixed component ID

  5724H7220

Applicable component levels

• R700 PSY

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