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IT32897: POSSIBLE TRAP (SEGV) OR MEMORY ERROR IN SQLVFREELOBMEM() IF QUERYING A TABLE FUNCTION RETURNING A ROWTYPE WITH A CLOB IN IT

Fixes are available

Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The condition is that the CLOB in the row returned by the
pipelined table function contains alternatively
NULL and non NULL CLOB data. This can lead to either a SEGV
(Trap) or to some memory 'corrupted block header'
failures.

Typical top of the stack would be:

0x090000000AE6C128 sqloCrashOnCriticalMemoryValidationFailure +
0x48
0x090000000AED7070
diagnoseMemoryCorruptionAndCrash__13SQLO_MEM_POOLFUlCPCcCb +
0x4F0
0x090000000AE6DF58
IPRA.$sqloDiagnoseFreeBlockFailure__FP8SMemFBlkCb + 0x758
0x090000000AE6C69C sqlofmblkEx + 0x11C
0x090000000D449B24 sqlvFreeLobMem__FP9sqllf_cso@AF14_5 + 0x24
0x090000000D44A688
sqlriRowDescCopy__FP8sqlrr_cbP18sqlriRowDescriptorT2 + 0x208
0x090000000D447840 sqlvSqlPLCopyRow__FP8sqlrr_cbP10sqlz_valueT2
+ 0x40
0x090000000F634E64 copyData__3PVMFP10sqlz_valueT1Ulb + 0x3E4
0x090000000F62A39C copyVariable__3PVMFUiT1 + 0xDC
0x090000000F627E48 run__3PVMFv + 0x1348
0x090000000F61375C pvm_entry + 0x45C
0x090000000AE32A8C sqloInvokeFnArgs + 0x5D6C
0x090000000E7E0558
IPRA.$sqlriInvokerTrusted__FP10sqlri_ufobP21sqlriRoutineErrorInt
fb + 0x2AF8
0x090000000E7D62A8 sqlriInvokeInvoker__FP10sqlri_ufobb + 0x2008
0x0900000011E24E44 sqlri_tfftc__FP8sqlrr_cbP9sqlri_tao + 0x324
0x090000000DAF42BC sqlriFetch__FP8sqlrr_cbP9sqlri_taol + 0x21C

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* Rowstore                                                     *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Db2 V11.1.4.6 or higher                           *
****************************************************************

    



Problem conclusion


    

  • Upgrade to Db2 V11.1.4.6 or higher

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT32897
    • 

  • 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
    2020-05-18
    • 

  • Closed date
    2021-03-26
    • 

  • Last modified date
    2021-03-26
    • 





    

  • 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  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1","Line of Business":{"code":"LOB10","label":"Data and AI"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            04 May 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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