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PI50535: WMQ ABEND 0C4 S0C4 ABN 0C4-00000011 M=CSQXDISP LOC=CSQXRCTL.CSQXRSCL

A fix is available

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APAR status

  • Closed as program error.

Error description

  • Abend 0C4 in Channel initiator (CHIN CHINIT)
    +CSQX112E CSQXDISP Dispatcher process error, TCB=009B1B00
              reason=0C4000-00000011
    IEA794I SVC DUMP HAS CAPTURED:
    DUMPID=001 REQUESTED BY JOB (CSQ1CHIN)
    DUMP TITLE=CSQ1,ABN= 0C4-00000011,M=CSQXDISP,
               LOC=CSQXRCTL.CSQXRSCL
    .
    The abend occurs while comparing the SSLPEER value for the
    channel against the DN attributes in the certificate due to an
    attempt to access storage beyond the end of the SSLPEER string.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS Version 8 *
    *                 Release 0 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: Abend S0C4 occurs in                    *
    *                      LOC=CSQXRCTL.CSQXRSCL during startup of *
    *                      an SSL/TLS channel with SSLPEER set.    *
    *                      The abend is followed by message:       *
    *                      "                                       *
    *                      CSQX112E CSQXDISP Dispatcher process    *
    *                      error, TCB=xxxxxxxx,                    *
    *                      reason=0C4000-00000011'                 *
    *                      "                                       *
    *                      Following the error, further errors     *
    *                      will occur for channels running on      *
    *                      or starting on the failed dispatcher.   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    During startup for a channel using SSL/TLS, the Distinguished
    Name in the peer certificate is compared against the values
    specified in the SSLPEER attribute of the channel definition.
    During this comparison it is possible for storage beyond the
    end of the SSLPEER string to be accessed, and if this storage is
    unavailable, the reported abend 0C4 can occur.
    

Problem conclusion

  • rsxCompareSSLPeerStrings is updated to check the remaining
    length of the SSLPEER value to avoid the invalid access to
    storage beyond its end, and prevent the abend occurring.
    000Y
    CMQXRSCL
    CSQXRSCL
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

APAR Information

  • APAR number

    PI50535

  • Reported component name

    WMQ Z/OS 8

  • Reported component ID

    5655W9700

  • Reported release

    000

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2015-10-14

  • Closed date

    2015-10-26

  • Last modified date

    2016-01-04

  • APAR is sysrouted FROM one or more of the following:

    PI48128

  • APAR is sysrouted TO one or more of the following:

    UI32354

Modules/Macros

  • CMQXRSCL CSQXRSCL
    

Fix information

  • Fixed component name

    WMQ Z/OS 8

  • Fixed component ID

    5655W9700

Applicable component levels

  • R000 PSY UI32354

       UP15/12/15 P F512 ¢

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.

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Document Information

Modified date:
04 January 2016