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IV66484: SYSTEM HANGS AFTER PROCESS USES PSINFO ON ITSELF APPLIES TO AIX 7100-03

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • ***************************************************************
    * USERS AFFECTED:
    * Systems running the 7100-03 Technology Level
    * with bos.mp64 below the 7.1.3.45 level.
    ***************************************************************
    * PROBLEM DESCRIPTION:
    * If a process tries to get psinfo on itself from a prochcall
    * resource handler during exec, that process will end up
    * stuck sleeping in prUblockSegAttach forever, waiting for
    * SEXECING_P to clear.  This will cause key system daemons to
    * eventually hang, waiting on a lock held by that process.
    * This will lead to the entire system to be effectively hung.
    *
    * This has been commonly encountered on systems running
    * Symantec VCS 6.0.xxx or custom kernel extensions that
    * register a prochcall resource handler during exec.
    ***************************************************************
    * RECOMMENDATION:
    * An interim fix is available from either
    * ftp://aix.software.ibm.com/aix/ifixes/iv66484/
    * https://aix.software.ibm.com/aix/ifixes/iv66484/
    ***************************************************************
    

Local fix

Problem summary

  • ***************************************************************
    * USERS AFFECTED:
    * Systems running the 7100-03 Technology Level
    * with bos.mp64 below the 7.1.3.45 level.
    ***************************************************************
    * PROBLEM DESCRIPTION:
    * If a process tries to get psinfo on itself from a prochcall
    * resource handler during exec, that process will end up
    * stuck sleeping in prUblockSegAttach forever, waiting for
    * SEXECING_P to clear.  This will cause key system daemons to
    * eventually hang, waiting on a lock held by that process.
    * This will lead to the entire system to be effectively hung.
    *
    * This has been commonly encountered on systems running
    * Symantec VCS 6.0.xxx or custom kernel extensions that
    * register a prochcall resource handler during exec.
    ***************************************************************
    * RECOMMENDATION:
    * An interim fix is available from either
    * ftp://aix.software.ibm.com/aix/ifixes/iv66484/
    * https://aix.software.ibm.com/aix/ifixes/iv66484/
    ***************************************************************
    

Problem conclusion

  • Avoid dead lock by properly serialize the opertion of holding
    the lock and posting event.
    

Temporary fix

  • *********
    * HIPER *
    *********
    

Comments

  • 6100-09 - use AIX APAR IV65814
    6100-09 - use AIX APAR IV65814
    7100-03 - use AIX APAR IV66484
    

APAR Information

  • APAR number

    IV66484

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Submitted date

    2014-10-31

  • Closed date

    2015-01-05

  • Last modified date

    2015-05-22

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

    IV65814

  • 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 U865837

       UP15/05/19 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV66484

Modified date: 22 May 2015