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IV63398: CRASH UNMOUNTING VERS 4 NFS FS AFTER EARLIER JFS2 FORCE UMOUNT APPLIES TO AIX 6100-09

A fix is available

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APAR status

  • Closed as program error.

Error description

  • The following sequence of events can cause a crash:
    
    1)A force unmount is done on a jfs2 filesystem running an
    executable
    2)The next mount operation is an nfs version 4 mount
    3)When the nfs filesystem is unmounted a crash will occur
    The stack of the crash is:
    
    abend_trap+000000 ()
    v_pdtinactive+000320 (??, ??)
    v_pdtdelete+000250 (??, ??, ??, ??)
    .backt+000100 ()
    ____ Exception (F00000002FF47600) ____
    
    .backt+000000 ()
    vm_umountx+00012C (??, ??, ??, ??)
    nfs.ext:nfs_pdt_rele+00015C (??, ??)
    nfs.ext:release_serv_obj+00018C (??)
    nfs.ext:free_f_loc+0000EC (??)
    nfs.ext:free_nfs4_fsid+000034 (??)
    nfs.ext:nfs4_fsid_rele+0000E4 (??)
    nfs.ext:nfs_free_mi+000198 (??)
    nfs.ext:nfs4_unmount+000484 (??, ??, ??)
    vfs_unmount+00008C (??, ??, ??)
    kunmount+000228 (??, ??, ??, ??)
    uvmount+00020C (??, ??)
    

Local fix

  • After doing a force jfs2 unmount, make sure the next
    mount
    operation is not an nfs 4 version mount.
    

Problem summary

  • A crash with a stack containing:
    abend_trap+000000 ()
    v_pdtinactive+000320 ()
    v_pdtdelete+000250 ()
    

Problem conclusion

  • We do not make this assert with an scb which has already been
    marked inactive.
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV47149
    6100-09 - use AIX APAR IV63398
    7100-02 - use AIX APAR IV45940
    7100-03 - use AIX APAR IV62286
    

APAR Information

  • APAR number

    IV63398

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2014-08-11

  • Closed date

    2014-08-11

  • Last modified date

    2016-05-11

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

    IV45940

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

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY U861283

       UP14/10/29 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Standard Edition

Software version: 610

Operating system(s): AIX

Reference #: IV63398

Modified date: 11 May 2016