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IV42249: CRASH IN IN_PCB_HASH_DEL FROM CLOSE() APPLIES TO AIX 7100-00

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APAR status

  • Closed as program error.

Error description

  • System could crash with a stack similar to,

[00022080]abend_trap+000000 ()
[05B67B3C]netinet:in_pcb_hash_del+0004FC (??)
[05B6AA58]netinet:in_pcbdetach+000578 (??)
[05BF3B24]netinet:tcp_close+0001A4 (??)
[05BF4208]netinet:tcp_drop+0001C8 (??, ??)
[05BE9358]netinet:tcp_disconnect+000138 (??)
[05BECBC8]netinet:tcp_usrreq+0005E8 (??, ??, ??, ??, ??)
[004FFFF8]soclose2+000278 (??, ??)
[00501C90]soclose+000010 (??)
[0050C540]soo_close+0002C0 (??)
[005E0D44]closef+000124 (??)
[005832C4]closefd+000144 (??, ??)
[005835F4]closex+000274 (??, ??)
[005838D4]close+000174 (??)

Local fix

  • 



Problem summary


    

  • System could crash with a stack similar to,

 00022080 abend_trap+000000 ()
 05B67B3C netinet:in_pcb_hash_del+0004FC (??)
 05B6AA58 netinet:in_pcbdetach+000578 (??)
 05BF3B24 netinet:tcp_close+0001A4 (??)
 05BF4208 netinet:tcp_drop+0001C8 (??, ??)
 05BE9358 netinet:tcp_disconnect+000138 (??)
 05BECBC8 netinet:tcp_usrreq+0005E8 (??, ??, ??, ??, ??)
 004FFFF8 soclose2+000278 (??, ??)
 00501C90 soclose+000010 (??)
 0050C540 soo_close+0002C0 (??)
 005E0D44 closef+000124 (??)
 005832C4 closefd+000144 (??, ??)
 005835F4 closex+000274 (??, ??)
 005838D4 close+000174 (??)

    



Problem conclusion


    

  • The synchronization issue existed when two threads tries to
close the same TCP connection is fixed. In this scenario,


 mustfix template continued in the next note

    <Note by fredcmvc (Maria joseph, Frederic), 2013/02/08
    05:51:00, seq: 6 rel: 0  action: note> code is modified not
to free the same memory the other is already freed.

    



Temporary fix


    

  • 



Comments


    

  • 6100-06 - use AIX APAR IV40105
6100-07 - use AIX APAR IV42211
6100-08 - use AIX APAR IV42102
7100-00 - use AIX APAR IV42249
7100-01 - use AIX APAR IV32335
7100-02 - use AIX APAR IV42149

    



APAR Information




    

  • APAR number
    IV42249
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2013-05-09
    • 

  • Closed date
    2013-05-09
    • 

  • Last modified date
    2013-11-24
    • 





    

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

    
IV32335
    

    • 

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

    
U860563
    

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U860563
       UP13/07/30  I  1000
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            24 November 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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