IBM Support

IT18165: FDCs with probe XC006001 and "invalid tail tag"

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APAR status

  • Closed as program error.

Error description

  • The SSLPEER within a certificate arriving from the remote side
    was 1024 bytes long.
    
    FDCs were seen from the amqrmppa process.  There was no outage.
    
    Probe Id :- XC006001
    Component :- xcsFreeMemFn
    Major Errorcode :- xecS_I_PRIVATE_MEMORY_ERROR
    Comment1 :- invalid tail tag
    

Local fix

  • NA
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    Users of certificates with long SSLPEER strings.
    
    
    Platforms affected:
    MultiPlatform
    
    ****************************************************************
    PROBLEM DESCRIPTION:
    IF The SSLPEER within the certificate arriving from the remote
    side was the maximum length of 1024 bytes long, the MQ queue
    manager failed to account for the additional null terminating
    byte, and made an invalid length calculation, resulting in
    overwriting the reserved area at the end of an internal data
    structure.
    
    There was no outage, and no break in functionality.
    

Problem conclusion

  • IBM MQ has been corrected to allocate enough memory to hold the
    SSLPEER value including the extra byte for the null-byte string
    terminator.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Version    Maintenance Level
    v7.5       7.5.0.8
    
    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

    IT18165

  • Reported component name

    WMQ BASE MULTIP

  • Reported component ID

    5724H7241

  • Reported release

    750

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-11-30

  • Closed date

    2017-01-19

  • Last modified date

    2017-05-24

  • 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 BASE MULTIP

  • Fixed component ID

    5724H7241

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSCPQ63","label":"APAR \/ Maintenance"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.5","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
24 May 2017