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IJ54964: A RACE CONDITION IN COOKIE MANAGEMENT IN NFS LOCK REQUEST

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APAR status

  • Closed as program error.

Error description

  • Ganesha crashes during blocked lock request processing The
thread stack in Ganesha during a crash may resemble the
following examples:

Crash-1:
raise
crash_handler
raise
abort
_nl_load_domain.cold.0
lock_entry_dec_ref
process_blocked_lock_upcall
state_blocked_lock_caller
fridgethr_start_routine
start_thread 
__clone

Crash-2:
raise
abort
state_hdl_cleanup
mdcache_lru_clean
_mdcache_lru_unref
mdcache_put_ref
lock_entry_dec_ref
remove_from_locklist
try_to_grant_lock
process_blocked_lock_upcall
state_blocked_lock_caller
fridgethr_start_routine
start_thread
__clone

Local fix

  • 



Problem summary


    

  • Ganesha crashes during blocked lock request processing.
The thread stack in Ganesha during a crash may resemble the
following examples:

Crash-1:
raise
crash_handler
raise
abort
_nl_load_domain.cold.0
lock_entry_dec_ref
process_blocked_lock_upcall
state_blocked_lock_caller
fridgethr_start_routine
start_thread
__clone

Crash-2:
raise
abort
state_hdl_cleanup
mdcache_lru_clean
_mdcache_lru_unref
mdcache_put_ref
lock_entry_dec_ref
remove_from_locklist
try_to_grant_lock
process_blocked_lock_upcall
state_blocked_lock_caller
fridgethr_start_routine
start_thread
__clone

    



Problem conclusion


    

  • This problem is fixed in 5.1.9.10
To see all Spectrum Scale APARs and their respective
Fix solutions refer to page: 
https://public.dhe.ibm.com/storage/spectrumscale/spectrum_scale
_apars.html


Benefits of the solution:
This fix addresses a crash that could occur during lock
contention or overlapping lock requests from the NFS client

Work Around:
None

Problem trigger:
Ganesha may crash when multiple NFS clients attempt to acquire
file locks simultaneously using blocked lock requests.

Symptom:
Crash

Platforms affected:
Linux Only

Functional Area affected:
NFS

Customer Impact:
High Importance

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IJ54964
    • 

  • Reported component name
    SPEC SCALE STD
    • 

  • Reported component ID
    5737F33AP
    • 

  • Reported release
    519
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2025-06-03
    • 

  • Closed date
    2025-06-10
    • 

  • Last modified date
    2025-06-10
    • 





    

  • 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
    SPEC SCALE STD
    • 

  • Fixed component ID
    5737F33AP
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"STXKQY"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"519","Line of Business":{"code":"LOB69","label":"Storage TPS"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            10 June 2025
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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