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IV88610: SYSTEM CRASHES DUE TO FREEING UNALLOCATED MEMORY ON FC#EN0H. APPLIES TO AIX 7100-03

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APAR status

  • Closed as program error.

Error description

  • On error path, freeing unallocated memory caused system crash
with the following stack trace
   abend_trap+000000
   xmdbg_error+000088
   xm_bad_free+0000C8
   xmfree+00049C
   entcore_ras_unregister+0000DC
   entcore_ras_deallocate_dev_blocks+000074
   entcore_config_state_machine+0016A4
   entcore_perform_term+0000AC
   entcore_config_init+000200
   entcore_config+000518
   lncent_config+000010
   config_kmod+0000F0
   sysconfig+0001F8
   syscall+000230

Local fix

  • 



Problem summary


    

  • On error path, freeing unallocated memory caused system crash
with the following stack trace
   abend_trap+000000
   xmdbg_error+000088
   xm_bad_free+0000C8
   xmfree+00049C
   entcore_ras_unregister+0000DC
   entcore_ras_deallocate_dev_blocks+000074
   entcore_config_state_machine+0016A4
   entcore_perform_term+0000AC
   entcore_config_init+000200
   entcore_config+000518
   lncent_config+000010
   config_kmod+0000F0
   sysconfig+0001F8
   syscall+000230

    



Problem conclusion


    

  • Required checks were added in the code to avoid freeing memory
which was not allocated.

    



Temporary fix


    

  • 



Comments


    

  • 6100-09 - use AIX APAR IV87600
7100-03 - use AIX APAR IV88610
7100-04 - use AIX APAR IV87733

    



APAR Information




    

  • APAR number
    IV88610
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2016-08-23
    • 

  • Closed date
    2016-08-23
    • 

  • Last modified date
    2017-01-20
    • 





    

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

    
IV87588
    

    • 

  • 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  U872382
       UP17/01/19  I  1000
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SG11R"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            20 April 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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