IBM Support

IV26542: CRASH DUE TO DOUBLE MBUF FREE ON DISK ERROR WHEN USING CLUSTER APPLIES TO AIX 7100-00

A fix is available

Obtain the fix for this APAR.

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • If there is a disk error when writing to a cluster repository
disk, there is a chance that the disk ping driver will
free an mbuf twice if it was one particular write call that
failed.  The double mbuf free can lead to a variety of
symptoms, including a possible crash during future mbuf
allocation, use, or deallocation.

Local fix

  • 



Problem summary


    

  • If there is a disk error when writing to a cluster repository
disk, there is a chance that the disk ping driver will
free an mbuf twice if it was one particular write call that
failed.  The double mbuf free can lead to a variety of
symptoms, including a possible crash during future mbuf
allocation, use, or deallocation.

    



Problem conclusion


    

  • Modified disk ping driver to avoid double mbuf free.

    



Temporary fix


    

  • 



Comments


    

  • 6100-06 - use AIX APAR IV28567
7100-00 - use AIX APAR IV26542

    



APAR Information




    

  • APAR number
    IV26542
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2012-08-20
    • 

  • Closed date
    2012-08-20
    • 

  • Last modified date
    2013-04-09
    • 





    

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

    
IV24312
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U851731
       UP12/12/07  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"AIX 7.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"","label":""}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            09 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
Page Feedback