Fixes are available
APAR status
Closed as program error.
Error description
A WebSphere MQ client application that was able to connect to the queue manager at MQ version 6.0 is not able to connect to the queue manager after it was migrated to version 7.0. The application connection attempt results in AMQ6119 error messages in the WebSphere MQ general error log. There is an FDC generated for the application process to report probe id XC130031 due to an Access Violation at address xxxxxxxxx when reading. The MQM Function Stack shows: reqDoConnect reqDuplicateCno xcsFFST This problem occurs because the client application specifies the version of the MQ connect options (MQCNO) structure as MQCNO_VERSION_2 and they are using the fields SSLConfigPtr and SSLConfigOffset which are valid only in versions of MQCNO greater than or equal to MQCNO_VERSION_4. The use of SSLConfigPtr was being ignored in WebSphere MQ v6. Although the WebSphere MQ v7 code checks for SSLConfigPtr and SSLConfigOffset correctly, it has incorrect behavior with respect to verification of the version of MQCNO and it will result in the Access Violation. ADDITIONAL KEYWORDS: SSL secure sockets layer HCONN MQCONN
Local fix
If the application use of SSLConfigPtr / SSLConfigOffset is intentional then modify the application to specify the version of the MQCNO structure as MQCNO_VERSION_4 or higher. If the use of SSLConfigPtr/SSLConfigOffset is not intentional, then initialize the MQCNO structure to MQCNO_DEFAULT before using it in the application.
Problem summary
**************************************************************** USERS AFFECTED: Users of WebSphere MQ C applications who specify MQCNO_VERSION_4 and less and use SSLConfigPtr / SSLConfigOffset. Users of WebSphere MQ C applications who specify MQCNO_VERSION_2 and less and use ClientConnPtr / ClientConnOffset. Platforms affected: All Distributed (iSeries, all Unix and Windows) **************************************************************** PROBLEM SUMMARY: WebSphere MQ applications that specified non-zero values for SSLConfigPtr or SSLConfigOffset and set the version of MQCNO to less than MQCNO_VERSION_4 received illegal memory access exceptions because there was no check in place to validate the version of MQCNO before using SSLConfigPtr and SSLConfigOffset. Similarly, applications that specified non-zero values for ClientConnPtr or ClientConnOffset and set the version of MQCNO to less than MQCNO_VERSION_2 received illegal memory access exception.
Problem conclusion
A check was introduced to validate the version of MQCNO in use before making use of SSLConfigPtr, SSLConfigOffset, ClientConPtr or ClientConnOffset. --------------------------------------------------------------- The fix is targeted for delivery in the following PTFs: v7.0 Platform Fix Pack 7.0.1.1 -------- -------------------- Windows U200310 AIX U827232 HP-UX (PA-RISC) U826485 HP-UX (Itanium) U826884 Solaris (SPARC) U827125 Solaris (x86-64) U827374 iSeries tbc_p700_0_1_1 Linux (x86) U826321 Linux (x86-64) U827231 Linux (zSeries) U827105 Linux (Power) U826779 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
IC63260
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
2009-09-18
Closed date
2009-10-30
Last modified date
2009-11-24
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:
31 March 2023