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IV70710: MAY CRASH IN EAMAPOUT WITH MODS ENABLED APPLIES TO AIX 7100-03 15/06/01 PTF PECHANGE

A fix is available

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APAR status

  • Closed as program error.

Error description

  • AIX may crash in the following stack with MODS enabled
    and  while setting AIXC or NFS4 ACL.
    
    This can only happen on the systems which are having
    the APAR IV47117 and MODS enabled.
    
    (0)> dw xmdbg
    xmdbg+000000: 00000001 00000000 3FFFFFFF FFFFFFFC
    ........?.......
    
    (0)> dr r3
    r3  : EEEE0000DA51B023   EEEE0000DA51B023
    
    (0)> f
    pvthread+03DB00 STACK:
    [0001C040]abend_trap+000000 ()
    [000DB2C8]xmdbg_error+000088 (??, ??, ??, ??)
    [00294338]check_free+000278 (??, ??, ??)
    [0028237C]validfault+00011C (??, ??, ??)
    [00280CEC]v_pfget+00038C (??, ??, ??, ??, ??, ??)
    [00279480]state_save_ret+000578 ()
    ____ Exception (F00000002FF47600) ____
    [0006AA7C].backt+000000 ()
    [0006BEF0].vcs_movep_excp+000020 ()
    [00361344]vmpcopy+000744 (F10001015175DC00,
    FFFFF00000000000,
       F00000002FF467C8, 0000060100000001, 0000000100000001,
    0000000002E02660,
       0000000000000000, 0000000000000000)
    [003629EC]vmfcopyin+0002CC (??, ??, ??, ??, ??, ??, ??,
    ??)
    [00361F18]vm_uiomove+000718 (??, ??, ??, ??)
    [003408D8]eaMapOut@AF43_5+000058 (??, ??, ??)
    [0033F2F4]j2_eav2_setxacl+000514 (??, ??, ??, ??, ??, ??)
    [0033E16C]j2_setxacl+0001CC (??, ??, ??, ??, ??, ??)
    [005FB788]vnop_setxacl_common+000088 (??, ??, ??, ??, ??,
    ??)
    [005FBB98]vnop_setxacl+0001D8 (??, ??, ??, ??, ??, ??)
    [008233C0]__chxacl+0002C0 (??, ??, ??, ??, ??, ??, ??,
    ??)
    [00003888]mfspurr_sc_flih01+0000E4 ()
    [kdb_get_virtual_memory] no real storage @ 2FF203A8
    [D029FEC0]D029FEC0 ()
    [kdb_read_mem] no real storage @ FFFFFFFFFFF8D40
    

Local fix

  • Disable MODS
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:
    * Systems running the 7100-03 Technology Level with bos.mp64
    * below 7.1.3.45
    ****************************************************************
    * PROBLEM DESCRIPTION:
    * AIX may crash in the following stack with MODS enabled
    * and  while setting AIXC or NFS4 ACL.
    * This can only happen on the systems which are having
    * the APAR IV47117 and MODS enabled.
    * (0)> dw xmdbg
    * xmdbg+000000: 00000001 00000000 3FFFFFFF FFFFFFFC
    * ........?.......
    * (0)> dr r3
    * r3  : EEEE0000DA51B023   EEEE0000DA51B023
    * (0)> f
    * pvthread+03DB00 STACK:
    *  0001C040 abend_trap+000000 ()
    *  000DB2C8 xmdbg_error+000088 (??, ??, ??, ??)
    *  00294338 check_free+000278 (??, ??, ??)
    *  0028237C validfault+00011C (??, ??, ??)
    *  00280CEC v_pfget+00038C (??, ??, ??, ??, ??, ??)
    *  00279480 state_save_ret+000578 ()
    * ____ Exception (F00000002FF47600) ____
    *  0006AA7C .backt+000000 ()
    *  0006BEF0 .vcs_movep_excp+000020 ()
    *  00361344 vmpcopy+000744 (F10001015175DC00,
    * FFFFF00000000000,
    *    F00000002FF467C8, 0000060100000001, 0000000100000001,
    * 0000000002E02660,
    *    0000000000000000, 0000000000000000)
    *  003629EC vmfcopyin+0002CC (??, ??, ??, ??, ??, ??, ??,
    * ??)
    *  00361F18 vm_uiomove+000718 (??, ??, ??, ??)
    *  003408D8 eaMapOut@AF43_5+000058 (??, ??, ??)
    *  0033F2F4 j2_eav2_setxacl+000514 (??, ??, ??, ??, ??, ??)
    *  0033E16C j2_setxacl+0001CC (??, ??, ??, ??, ??, ??)
    *  005FB788 vnop_setxacl_common+000088 (??, ??, ??, ??, ??,
    * ??)
    *  005FBB98 vnop_setxacl+0001D8 (??, ??, ??, ??, ??, ??)
    *  008233C0 __chxacl+0002C0 (??, ??, ??, ??, ??, ??, ??,
    * ??)
    *  00003888 mfspurr_sc_flih01+0000E4 ()
    *  kdb_get_virtual_memory  no real storage @ 2FF203A8
    *  D029FEC0 D029FEC0 ()
    *  kdb_read_mem  no real storage @ FFFFFFFFFFF8D40
    ****************************************************************
    * RECOMMENDATION:
    * Install APAR IV70710.
    ****************************************************************
    

Problem conclusion

  • Corrected the code to write data within the allocated memory.
    

Temporary fix

Comments

  • 6100-09 - use AIX APAR IV70497
    7100-03 - use AIX APAR IV70710
    

APAR Information

  • APAR number

    IV70710

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    YesPE

  • HIPER

    NoHIPER

  • Submitted date

    2015-03-09

  • Closed date

    2015-03-09

  • Last modified date

    2015-06-01

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

    IV70497

  • 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 #: IV70710

Modified date: 01 June 2015