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IV60586: DEADLOCK IN MULTITHREADED PROCESSES BETWEEN LIBS MUTEXES

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You can track all active APARs for this component.

 

APAR status

  • Closed as fixed if next.

Error description

  • A multi-threaded process of an authentication load
    module,
    such as pdosd, might hang due to a deadlock between two
    threads holding locks on mutex in security routines.
    
    Most of threads are blocked in global_lock_common, having
    stack similar to:
    
    _global_lock_common(??, ??, ??) at 0xd04f1620
    _rec_mutex_lock(??) at 0xd012b084
    _unload_secmethod(??) at 0xd01ed264
    getuserattrs(??, ??, ??) at 0xd020a514
    _getpwnam_shadow_r(??, ??, ??, ??, ??) at 0xd01ff080
    _posix_getpwnam_shadow_r(??, ??, ??, ??, ??, ??) at
    0xd01fc63c
    uid.getpwnam_r() at 0xd38e16fc
    

Local fix

  • N/A
    

Problem summary

  • unnecessary dce locks have been taken in libc code which cause
    deadlock situation.
    

Problem conclusion

Temporary fix

Comments

  • This APAR is being closed FIN. This means that a solution to
    this APAR is expected to be delivered from IBM in a release
    (if any) to be available within the next 24 months.
    

APAR Information

  • APAR number

    IV60586

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-05-16

  • Closed date

    2014-06-27

  • Last modified date

    2014-09-02

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY

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Document Information

Modified date:
02 September 2014