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IV54990: READING FROM LOOPBACK CAUSES SYSTEM CRASH LOOP_RW_STRAT+0002B0 APPLIES TO AIX 6100-09

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APAR status

  • Closed as program error.

Error description

  • Reading data from loopback device causes system crash.
The system crashed in fp_llseek in loopbackpg with
the following stack trace.
    (3)> th
                    SLOT NAME     STATE    TID PRI   RQ
CPUID  CL  WCHAN
    pvthread+016B00  363*loopback RUN   16B0013 05F    3
       0
    NAME................ loopbackpg
                       :

    (3)> f
    pvthread+016B00 STACK:
    [005B0548]fp_llseek+000068 (0000000000000000,
0000000002722000,
       0000000000000000 [??])
    [00014F50].kernel_add_gate_cstack+000030 ()
    [06400B70]loop_rw_strat+0002B0 (??, ??)
    [06400FF8]loop_pager+0000D8 (??, ??, ??)
    [00231A10]procentry+000010 (??, ??, ??, ??)
    [kdb_read_mem] no real storage @ FFFFFFFFFFF9340

    (2)> dc fp_llseek 100

Local fix

  • N/A

Problem summary

  • READING FROM LOOPBACK CAUSES SYSTEM CRASH LOOP_RW_STRAT+0002B0

Problem conclusion

  • NULL pointer access eliminated

Temporary fix

  • 



Comments


    

  • 6100-09 - use AIX APAR IV54990
7100-03 - use AIX APAR IV54915
7100-04 - use AIX APAR IV54932

    



APAR Information




    

  • APAR number
    IV54990
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2014-02-04
    • 

  • Closed date
    2014-02-04
    • 

  • Last modified date
    2016-05-10
    • 





    

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

    
IV52570
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX 610 STD EDI
    • 

  • Fixed component ID
    5765G6200
    • 



Applicable component levels


    

  • R610  PSY  U860208
       UP14/05/21  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            10 May 2016
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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