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IV79262: POSSIBLE SYSTEM CRASH USING PROCFS TO READ 32BIT PROCESS MAP FIL APPLIES TO AIX 7100-04

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APAR status

  • Closed as program error.

Error description

  • ***************************************************************
* USERS AFFECTED:
* Systems running the AIX 7100-04 Technology Level
* with bos.mp64 at the 7.1.4.0 level.
***************************************************************
* PROBLEM DESCRIPTION:
* Using the procmap, procldd, or genld command on a 32 bit
* process, or directly reading /proc/<pid>/map for a 32 bit
* process, may result in kernel memory corruption which may
* result in an immediate or future crash of the system.
*
* This only affects AIX 7.1 TL4 and 7.2
***************************************************************
* RECOMMENDATION:
* Install APAR IV79262.
* Prior to fix availability, an interim fix is available from
* either
* ftp://aix.software.ibm.com/aix/ifixes/iv79262/
* https://aix.software.ibm.com/aix/ifixes/iv79262/
* Installation of the ifix requires a reboot.
***************************************************************

Local fix

  • 



Problem summary


    

  • ***************************************************************
* USERS AFFECTED:
* Systems running the AIX 7100-04 Technology Level
* with bos.mp64 at the 7.1.4.0 level.
***************************************************************
* PROBLEM DESCRIPTION:
* Using the procmap, procldd, or genld command on a 32 bit
* process, or directly reading /proc/<pid>/map for a 32 bit
* process, may result in kernel memory corruption which may
* result in an immediate or future crash of the system.
*
* This only affects AIX 7.1 TL4 and 7.2
***************************************************************
* RECOMMENDATION:
* Install APAR IV79262.
* Prior to fix availability, an interim fix is available from
* either
* ftp://aix.software.ibm.com/aix/ifixes/iv79262/
* https://aix.software.ibm.com/aix/ifixes/iv79262/
* Installation of the ifix requires a reboot.
***************************************************************

    



Problem conclusion


    

  • Fix the kernel code that generates the /proc/<pid>/map data.
The procmap reads this data, however, user processes can also
access the file directly if they have sufficient privilege to
do so.

    



Temporary fix


    

  • *********
* HIPER *
*********

    



Comments


    

  • 



APAR Information




    

  • APAR number
    IV79262
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    YesPE
    • 

  • HIPER
    YesHIPER
    • 

  • Submitted date
    2015-11-30
    • 

  • Closed date
    2015-12-01
    • 

  • Last modified date
    2016-11-09
    • 





    

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

    • 

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

    
IV79377 IV79441 IV79555
    

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U862891
       UP16/10/25  I  1000  «
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            09 November 2016
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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