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IZ92322: LINUX LSOF CRASHES NODE

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APAR status

  • Closed as program error.

Error description

  • lsof causes a crash on nodes with rhel kernel
and GPFS 3.2

Local fix

  • 



Problem summary


    

  • In cxiRegisterCleanup() : ts/kernext/gpl-linux/cixSystem.c,
GPFS will create a dummy files manually (directly create
inode/dentry/super_block in linux kernel, rather than through
system call). In addition, the field "s_type" in super_block
has been filled with NULL by current code. However, in some
version of linux kernel, system call "stat()" may try to
dereference this field, which will cause kernel crash.

    



Problem conclusion


    

  • Fill the field "s_type" with a pointer to a meaningful data
structure (struct file_system_type gpfs_fs_type).This fix
should be backported to gpfs 3.4/3.3/3.2.
Furthermore, when gpfs version >= 3.3 and Linux kernel version
>= 2063100, a macro SET_SUPER_USE_SGET will be defined, which
will create a superblock not having this problem. However, this
fix will ensure that the problem will not happen for all the
gpfs versions and Linux kernel versions.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IZ92322
    • 

  • Reported component name
    GPFS/AIX5L V3
    • 

  • Reported component ID
    5765G66AP
    • 

  • Reported release
    330
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2011-01-17
    • 

  • Closed date
    2011-01-17
    • 

  • Last modified date
    2013-06-06
    • 





    

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

    
IZ91311
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    GPFS/AIX5L V3
    • 

  • Fixed component ID
    5765G66AP
    • 



Applicable component levels


    

  • R330  PSY  U859890
       13/06/06  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            19 August 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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