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IV92460: KXGANESHA BUG: UNABLE TO HANDLE KERNEL PAGING REQUEST

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APAR status

  • Closed as program error.

Error description

  • When we handle a OPENHANDLE_GET_VERIFIER from Ganesha. We
miss a
copy_from_user there, which leads to the kernel oops.

       PANIC: "BUG: unable to handle kernel paging
request at 00007f25519f5ac0"

   0xffffffffa08d8e75 <kxGanesha+1589>: jmpq
0xffffffffa08d88bc <kxGanesha+124>
   0xffffffffa08d8e7a <kxGanesha+1594>: mov
(%r12),%edi     oops when access arg->fd
   0xffffffffa08d8e7e <kxGanesha+1598>: test   %edi,%edi
   0xffffffffa08d8e80 <kxGanesha+1600>: jg
0xffffffffa08d977c <kxGanesha+3900>
   0xffffffffa08d977c <kxGanesha+3900>: callq
0xffffffffa08b1870 <get_vfsmount_from_fd>

Local fix

  • 



Problem summary


    

  • When we handle OPENHANDLE_GET_VERIFIER op from Ganesha. We
miss a copy_from_user there, which leads to the kernel oops.

    



Problem conclusion


    

  • Added missed copy_from_user

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV92460
    • 

  • Reported component name
    SPECTRUM SCALE
    • 

  • Reported component ID
    5725Q01LX
    • 

  • Reported release
    421
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2017-01-20
    • 

  • Closed date
    2017-05-01
    • 

  • Last modified date
    2017-05-01
    • 





    

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

    • 

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

    • 



Fix information


    

  • Fixed component name
    SPECTRUM SCALE
    • 

  • Fixed component ID
    5725Q01LX
    • 



Applicable component levels


    

  • R421  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"STXKQY","label":"IBM Spectrum Scale"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"421","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSFKCN","label":"General Parallel File System"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"421","Edition":"","Line of Business":{"code":"","label":""}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            01 May 2017
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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