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

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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 number

    IC64690

  • Reported component name

    WMQ WINDOWS V7

  • Reported component ID

    5724H7220

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-11-19

  • Closed date

    2009-11-26

  • Last modified date

    2009-11-26

  • 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

       UP

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Document Information

Modified date:
26 November 2009