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

WebSphere MQ V7.0 Fix Pack 7.0.1.4
WebSphere MQ V7.0.1 for i5/OS Fix Pack 7.0.1.4

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 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