IBM Support

IC98400: REPLICATED LVARCHAR COLUMNS WITH DIFFERENT SOURCE/TARGET LENGTHSCAN LEAD TO MEMORY CORRUPTION

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APAR status

  • Closed as program error.

Error description

  • Enterprise Replication allows the creation of a replicate on a
table containing an lvarchar column and the addition of
participants to be added when the target's column length is
shorter than the table from which the master replicate was
created. This can lead to memory corruption because column
lengths are not being checked on lvarchar columns by the target
server.

Since this is memory corruption due to out of bounds memory
writes, the results may vary. Here are a couple stacks seen:

afstack
afhandler
afwarn_interface
mt_shm_malloc_segid
mt_malloc
cdr_mt_shm_malloc
cdr_mt_shm_realloc
dsiGetLocalRow
dsiCheckCollision
dsiProcessRow
dsiResolverThread
cdrTrampolineThread
th_init_initgls
startup

afstack
afhandler
affail_interface
mt_shm_malloc_segid
mt_malloc
cdr_mt_shm_malloc
rmStreamOpen
rmiCreateDSPreLocks
rmiGetNextPendingTxn
rmNextMsg
dsiResolverThread
cdrTrampolineThread
th_init_initgls
startup

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:                                              *
* any customer using LVARCHARS and ER                          *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Update to IDS-11.70.xC9                                      *
****************************************************************

    



Problem conclusion


    

  • Problem Fixed In IDS-11.70.xC9

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IC98400
    • 

  • Reported component name
    INFORMIX SERVER
    • 

  • Reported component ID
    5725A3900
    • 

  • Reported release
    B70
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2013-12-18
    • 

  • Closed date
    2017-06-09
    • 

  • Last modified date
    2017-06-09
    • 





    

  • 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
    INFORMIX SERVER
    • 

  • Fixed component ID
    5725A3900
    • 



Applicable component levels


    

  • RA10  PSN
       UP
    • 

  • RA10  PSY
       UP
    • 

  • RB10  PSN
       UP
    • 

  • RB10  PSY
       UP
    • 

  • RB50  PSN
       UP
    • 

  • RB50  PSY
       UP
    • 

  • RB70  PSN
       UP
    • 

  • RB70  PSY
       UP
    • 

  • RC10  PSN
       UP
    • 

  • RC10  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSGU8G","label":"Informix Servers"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"B70","Edition":"","Line of Business":{"code":"","label":""}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            09 June 2017
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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