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IV54915: READING FROM LOOPBACK CAUSES SYSTEM CRASH LOOP_RW_STRAT+0002B0 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

  • Reading data from loopback device causes system crash.
    The system crashed in fp_llseek in loopbackpg with
    the following stack trace.
        (3)> th
                        SLOT NAME     STATE    TID PRI   RQ
    CPUID  CL  WCHAN
        pvthread+016B00  363*loopback RUN   16B0013 05F    3
           0
        NAME................ loopbackpg
                           :
    
        (3)> f
        pvthread+016B00 STACK:
        [005B0548]fp_llseek+000068 (0000000000000000,
    0000000002722000,
           0000000000000000 [??])
        [00014F50].kernel_add_gate_cstack+000030 ()
        [06400B70]loop_rw_strat+0002B0 (??, ??)
        [06400FF8]loop_pager+0000D8 (??, ??, ??)
        [00231A10]procentry+000010 (??, ??, ??, ??)
        [kdb_read_mem] no real storage @ FFFFFFFFFFF9340
    
        (2)> dc fp_llseek 100
    

Local fix

  • N/A
    

Problem summary

  • READING FROM LOOPBACK CAUSES SYSTEM CRASH LOOP_RW_STRAT+0002B0
    

Problem conclusion

  • NULL pointer access eliminated
    

Temporary fix

Comments

  • 6100-09 - use AIX APAR IV54990
    7100-03 - use AIX APAR IV54915
    7100-04 - use AIX APAR IV54932
    

APAR Information

  • APAR number

    IV54915

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-02-03

  • Closed date

    2014-02-03

  • Last modified date

    2016-05-10

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

    IV52570

  • 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 U860282

       UP14/05/22 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV54915

Modified date: 10 May 2016