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IC69881: WEBSPHERE MQ TRACE CAN GENERATE A FAULT WHEN AN APPLICATION PASSES OLDER MQOD STRUCTURE VERSIONS TO MQI MQOPEN/MQPUT1 CALL

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APAR status

  • Closed as program error.

Error description

  • When WebSphere MQ trace traces the MQOD parameter passed to MQI
    MQOPEN or MQPUT1 calls, it records the full contents of the
    structure without regard to their version.  For example, if an
    application passes a version 2 MQOD to MQOPEN, the trace will
    treat the MQOD as if it were the current version.  The trace
    may generate a fault if the memory after the end of the version
    2 MQOD is not allocated.
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users who enable trace and supply MQOD structures less than
    the current version. This especially applies to .Net customers
    as the MQ .Net layer starts with a version 1 structure and only
    changes the version field when newer MQOD fields are used.
    
    Platforms affected:
    All Distributed (iSeries, all Unix and Windows)
    ****************************************************************
    PROBLEM SUMMARY:
    When an MQOD structure is traced, the data was dumped up as the
    size of the current MQOD structure size. Should a smaller,
    earlier version structure be supplied, MQ would reference
    beyond the end of that structure during the tracing. Should the
    structure be near a page boundary, meaning that the additional
    data being referenced was non-readable, then an exception will
    occur.
    

Problem conclusion

  • The MQ trace macro for the MQOD structure has been modified to
    take into account the version field when deciding what size of
    data to trace.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
                       v7.0
    Platform           Fix Pack 7.0.1.4
    --------           --------------------
    Windows            U200323
    AIX                U835793
    HP-UX (PA-RISC)    U836458
    HP-UX (Itanium)    U836463
    Solaris (SPARC)    U836459
    Solaris (x86-64)   U836465
    iSeries            tbc_p700_0_1_4
    Linux (x86)        U836460
    Linux (x86-64)     U836464
    Linux (zSeries)    U836461
    Linux (Power)      U836462
    
    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

    IC69881

  • 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

    2010-07-13

  • Closed date

    2010-07-28

  • Last modified date

    2010-07-28

  • 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:
28 July 2010