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IV68988: REALLOC() MAY CORRUPT MALLOC META DATA IF DATA ULIMIT IS REACHED APPLIES TO AIX 7100-03

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APAR status

  • Closed as program error.

Error description

  • Documentation of realloc: "If no memory object can be
acquired to accommodate the request, the object remains
unchanged."

In case "realloc(Pointer, Size)" fails, as the data
ulimit
is reached (errno ENOMEM) the memory pointed to by
"Pointer"
gets corrupted and fails to be freed later on.

Local fix

  • Make sure the code execution never hits a data memory
limit.

Problem summary

  • Realloc() corrupts malloc data if data limit is crossed.

Problem conclusion

  • Fixing the malloc data.

Temporary fix

  • 



Comments


    

  • 6100-09 - use AIX APAR IV69040
7100-03 - use AIX APAR IV68988

    



APAR Information




    

  • APAR number
    IV68988
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2015-01-28
    • 

  • Closed date
    2015-01-28
    • 

  • Last modified date
    2015-05-22
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    
IV67641
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U869596
       UP15/05/20  I  1000
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            22 May 2015
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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