IBM Support

IT25278: When using the IBM MQ 'runmqsc -n' command to create a CCDT thenit fails with an FDC ProbeID XC130003

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APAR status

  • Closed as program error.

Error description

  • When using the runmqsc -n command to create a Client Channel
    Definition Table (CCDT), it fails and creates a SEGV failure
    data capture (FDC) records with ProbeID
    XC130003.  This FDC record will contain a call stack which looks
    like this:
    
    /opt/mqm/lib64/libmqmcs_r.so(xcsPrintStackForCurrentThread+0x3e)
    [0x7fb2f
    4a70c7e]
    /opt/mqm/lib64/libmqmcs_r.so(+0x11542a)[0x7fb2f4a8b42a]
    /opt/mqm/lib64/libmqmcs_r.so(PrepareDumpAreas+0xc07)[0x7fb2f4a8a
    297]
    /opt/mqm/lib64/libmqmcs_r.so(xcsFFSTFn+0xb75)[0x7fb2f4a8c4e5]
    /opt/mqm/lib64/libmqmcs_r.so(xcsFFSTSFn+0x1a2)[0x7fb2f4a88a62]
    /opt/mqm/lib64/libmqmcs_r.so(+0x10ce81)[0x7fb2f4a82e81]
    /opt/mqm/lib64/libmqmcs_r.so(xehExceptionHandler+0x1c5)[0x7fb2f4
    a83575]
    /usr/lib64/libpthread.so.0(+0xf680)[0x7fb2f4769680]
    /opt/mqm/lib64/libmqiz_r.so(pcmCheckValidSSLCipherSpecString+0x1
    2b)[0x7f
    b2f37e9b2b]
    /opt/mqm/lib64/libmqiz_r.so(pcmChlDefUpd+0x20f2)[0x7fb2f37c19d2]
    /opt/mqm/lib64/libmqiz_r.so(pcmCreateChannel+0x965)[0x7fb2f37c2e
    a5]
    /opt/mqm/lib64/libmqiz_r.so(reqClientMQSC+0xd30)[0x7fb2f37e8670]
    runmqsc[0x401952]
    /usr/lib64/libc.so.6(__libc_start_main+0xf5)[0x7fb2f41ab3d5]
    runmqsc[0x401cb9]
    
    MQM Function Stack
    
    mqscMAIN
    mqscMAIN
    pcmCreateChannel
    pcmChlDefUpd
    xcsFFST
    

Local fix

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of "runmqsc -n" who define channels with weak cipher
    specifications may be affected by this problem
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    When runmqsc was used with the -n option to modify a local CCDT
    then attempting to define a channel with a weak SSL/TLS cipher
    specification resulted in a segmentation violation.  This was
    caused by the IBM MQ code attempting to access an uninitialised
    data structure.
    

Problem conclusion

  • The IBM MQ code has been corrected so that the data structure is
    initialised before it is accessed.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v9.0 CD    9.0.5
    v9.0 LTS   9.0.0.5
    
    
    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

    IT25278

  • Reported component name

    IBM MQ BASE M/P

  • Reported component ID

    5724H7261

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-06-06

  • Closed date

    2018-07-05

  • Last modified date

    2018-08-28

  • 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

    IBM MQ BASE M/P

  • Fixed component ID

    5724H7261

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.0","Edition":"","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
28 August 2018