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IT26275: UNDER SOME CONDITIONS, A BUFFER OVERFLOW CAN OCCUR WHEN READING FROM BLU PAGES THAN LEADS TO A HANG OR CRASH

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APAR status

  • Closed as program error.

Error description

  • During a huge load of data in a BLU table, the engine might hang
    due to a buffer overflow reading a BLU page in memory.
    
    A stack similar to the following is generated:
    
    offset: 0000000000000E3F in <...::getCodes>
    <S:\...\common\osse\core\inc\ossbit.h:503>
    offset: 0000000000000074 in <...::unpack>
    <S:\...\engn\cde\query\BankUnpacker.cpp:730>
    offset: 00000000000011D3 in <...::processTSNRangeOnPage>
    <S:\...\engn\cde\query\LoadColValueEvaluator.cpp:2547>
    offset: 0000000000000C5D in <...::processTSNRange>
    <S:\...\engn\cde\query\LoadColValueEvaluator.cpp:1633>
    offset: 00000000000005D1 in
    <...::processInputsSynchronously><S:\...\engn\cde\query\LoadColV
    alueEvaluator.cpp:204>
    
    Windows platform are more prone to this problem than the other
    platforms.
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL                                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Upgrade to Db2 Version 11.1 Mod 4 Fix Pack 4 for Linux,      *
    * UNIX, and Windows                                            *
    ****************************************************************
    

Problem conclusion

  • Problem was first fixed in Db2 Version 11.1 Mod 4 Fix Pack 4 for
    Linux, UNIX, and Windows
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT26275

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-09-13

  • Closed date

    2018-12-09

  • Last modified date

    2018-12-09

  • 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

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

  • RB10 PSN

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
09 December 2018