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IV29846: SYSTEM CRASH IN TCP_TIMERS APPLIES TO AIX 7100-02

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APAR status

  • Closed as program error.

Error description

  • System may crash with the following stack.


(1)> f
pvthread+002300 STACK:
[044543E4]tcp_timers+0007C4 (0000000700000000,
000000000447BC90 [??])
[04447B84]tcp_usrreq+0019A4 (??, ??, ??, ??, ??)
[044555CC]tcp_slowtimo+00054C ()
[004905E8]pfslowtimo+000128 ()
[00481138]Netintr+0002F8 ()
[00480E00]netisr_thread+000020 ()
[003567D4]threadentry+000094 (??, ??, ??, ??)
[kdb_read_mem] no real storage @ FFFFFFFFFFF9470

Local fix

  • 



Problem summary


    

  • System crash with the following stack.
(1)> f
pvthread+002300 STACK:
 044543E4 tcp_timers+0007C4 (0000000700000000,
000000000447BC90  ?? )
 04447B84 tcp_usrreq+0019A4 (??, ??, ??, ??, ??)
 044555CC tcp_slowtimo+00054C ()
 004905E8 pfslowtimo+000128 ()
 00481138 Netintr+0002F8 ()
 00480E00 netisr_thread+000020 ()
 003567D4 threadentry+000094 (??, ??, ??, ??)
 kdb_read_mem  no real storage @ FFFFFFFFFFF9470

    



Problem conclusion


    

  • Kcid is taken before tcp drops the connection and this
is used later while accounting wpar specific data.
This change in tcp_timer will not access invalid pointer
and  prevents system crash.

    



Temporary fix


    

  • 



Comments


    

  • 6100-04 - use AIX APAR IV05701
6100-05 - use AIX APAR IV05414
6100-06 - use AIX APAR IV02387
6100-07 - use AIX APAR IV04352
6100-07 - use AIX APAR IV04352
7100-02 - use AIX APAR IV29846

    



APAR Information




    

  • APAR number
    IV29846
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2012-10-09
    • 

  • Closed date
    2012-10-09
    • 

  • Last modified date
    2013-04-10
    • 





    

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

    
IV02387
    

    • 

  • 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  U852704
       UP13/02/18  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"AIX 7.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"","label":""}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            10 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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