IBM Support

IT33147: Running the endmqm command results in munmap_chunk(): invalid pointer error

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APAR status

  • Closed as program error.

Error description

  • When using IBM MQ, the command endmqm shows a memory
overwrite problem:
.
*** Error in `endmqm': munmap_chunk(): invalid pointer:
0x00000000008e9380 ***

======= Backtrace: =========

/usr/lib64/libc.so.6(+0x7f804)[0x7f04e3315804]
/opt/mqm/v9101/lib64/libmqmcs_r.so(xcsFreeMemFn+0x39a)[0x7f04e4f
ba29a]
/opt/mqm/v9101/lib64/libmqmcs_r.so(xcsDisconnectSharedMemSet+0x3
82)[0x7f04e4ff5f22]
/opt/mqm/v9101/lib64/libmqmcs_r.so(xcsDisconnectSharedSubpool+0x
894)[0x7f04e4fdfa24]
/opt/mqm/v9101/lib64/libmqmcs_r.so(xcsTerminate+0xca4)[0x7f04e4f
5fbf4]
/opt/mqm/v9101/lib64/libmqmr_r.so(rppDisconnectPool+0x15f)[0x7f0
4e456143f]
/opt/mqm/v9101/lib64/libmqmr_r.so(rrxStopAllChannels+0x1313)[0x7
f04e44da203]
endmqm[0x401f23]
/usr/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f04e32b8545]
endmqm[0x403683]

Local fix

  • 



Problem summary


    

  • ****************************************************************
USERS AFFECTED:
Users with a large number of channels are more likely to be
affected by this problem.


Platforms affected:
MultiPlatform

****************************************************************
PROBLEM DESCRIPTION:
This problem is caused by an internal memory overwrite during
endmqm processing.

    



Problem conclusion


    

  • The code has been corrected to fix the memory overwrite.

---------------------------------------------------------------
The fix is targeted for delivery in the following PTFs:

Version    Maintenance Level
v9.1 LTS   9.1.0.7
v9.x CD    9.2.2

The latest available maintenance can be obtained from
'WebSphere MQ Recommended Fixes'
http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006037

If the maintenance level is not yet available information on
its planned availability can be found in 'WebSphere MQ
Planned Maintenance Release Dates'
http://www-1.ibm.com/support/docview.wss?rs=171&uid=swg27006309
---------------------------------------------------------------

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IT33147
    • 

  • Reported component name
    IBM MQ BASE MP
    • 

  • Reported component ID
    5724H7271
    • 

  • Reported release
    910
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-06-10
    • 

  • Closed date
    2020-11-10
    • 

  • Last modified date
    2020-11-10
    • 





    

  • 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
    IBM MQ BASE MP
    • 

  • Fixed component ID
    5724H7271
    • 



Applicable component levels


    








      
              
                            

              

              [{"Line of Business":{"code":"LOB45","label":"Automation"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"910"}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            11 November 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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