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IV74403: FUSER/PROCFILES COMMAND MAY STUCK IN AN ENDLESS LOOP APPLIES TO AIX 6100-09

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APAR status

  • Closed as program error.

Error description

  • The fuser command may stuck in an endless loop.
Using truss -p <fuser PID> will show that fuser
is working on the same files over and over again.
Example:
getdirent(3, 0x000000012BD1E890, 1024) = 816
<snip>
statx("/proc/10223694/fd/106",...)
statfs("/proc/10223694/fd/106",...)
statx("/proc/10223694/fd/109",...)
statfs("/proc/10223694/fd/109",...)
getdirent(3, 0x000000012BD1E890, 1024) = 1008
statx("/proc/10223694/fd/0",...)
statfs("/proc/10223694/fd/0",...)
statx("/proc/10223694/fd/1",...)
statfs("/proc/10223694/fd/1",...)
<snap>
statx("/proc/10223694/fd/106",...)
statfs("/proc/10223694/fd/106",...)
statx("/proc/10223694/fd/109",...)
statfs("/proc/10223694/fd/109",...)
getdirent(3, 0x000000012BD1E890, 1024) = 1008
statx("/proc/10223694/fd/0",...)
<snip>
In this case the command
procfiles 10223694
will loop as well.

Local fix

  • For the fuser command:
export FUSER_VERSION=1
run the command/script executing fuser
unset FUSER_VERSION
No workaround for procfiles.

Problem summary

  • ****************************************************************
* USERS AFFECTED:
* Systems running the 6100-09 Technology Level with
* bos.mp64 at or above 6.1.9.15 and below 6.1.9.100
****************************************************************
* PROBLEM DESCRIPTION:
* The fuser command may stuck in an endless loop.
* Using truss -p <fuser PID> will show that fuser
* is working on the same files over and over again.
* Example:
* getdirent(3, 0x000000012BD1E890, 1024) = 816
* <snip>
* statx("/proc/10223694/fd/106",...)
* statfs("/proc/10223694/fd/106",...)
* statx("/proc/10223694/fd/109",...)
* statfs("/proc/10223694/fd/109",...)
* getdirent(3, 0x000000012BD1E890, 1024) = 1008
* statx("/proc/10223694/fd/0",...)
* statfs("/proc/10223694/fd/0",...)
* statx("/proc/10223694/fd/1",...)
* statfs("/proc/10223694/fd/1",...)
* <snap>
* statx("/proc/10223694/fd/106",...)
* statfs("/proc/10223694/fd/106",...)
* statx("/proc/10223694/fd/109",...)
* statfs("/proc/10223694/fd/109",...)
* getdirent(3, 0x000000012BD1E890, 1024) = 1008
* statx("/proc/10223694/fd/0",...)
* <snip>
* In this case the command
* procfiles 10223694
* will loop as well.
****************************************************************
* RECOMMENDATION:
* Install APAR IV74403.
****************************************************************

Problem conclusion

  • offset caluclation is changed  in such a way that it is
dependent on the last filename that was returned.

Temporary fix

  • 



Comments


    

  • 6100-09 - use AIX APAR IV74403
7100-04 - use AIX APAR IV73971

    



APAR Information




    

  • APAR number
    IV74403
    • 

  • Reported component name
    AIX 610 STD EDI
    • 

  • Reported component ID
    5765G6200
    • 

  • Reported release
    610
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    YesPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2015-06-19
    • 

  • Closed date
    2015-06-19
    • 

  • Last modified date
    2017-01-20
    • 





    

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

    
IV73971
    

    • 

  • 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  U861403
       UP15/11/22  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            17 December 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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