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PI76695: LINUX KERNEL DUMPS IF /DEV FILESYSTEM ACCESSED THROUGH A VIEW-EXTENDED PATH

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APAR status

  • Closed as program error.

Error description

  • When accessing the /dev filesystem on a Linux system via an IBM
    Rational ClearCase dynamic view using a view extended path in
    the form of /view/{view-tag}/dev, a kernel crash may occur. This
    has been most recently observed on Red Hat Linux 7.3.
    
    Accessing this filesystem using a view-extended path is not a
    supported operation, but this should not cause a kernel crash.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of ClearCase dynamic views on supported versions of    *
    * Linux.                                                       *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * As documented in ClearCase technote 1259280, accessing       *
    * non-VOB files using a fully qualified view-extended pathname *
    * on Linux kernels after 2.4.18 is not supported due to kernel *
    * limitations.  In most cases, the result of the command is    *
    * only that incomplete data is presented.  However, on some    *
    * kernels, this may cause a system crash.                      *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • The non-VOB pathname access using a view-extended pathname is
    still not supported, but ClearCase versions 8.0.1.16, 9.0.0.5
    and 9.0.1.1 have been updated so that these references will not
    cause a system crash.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PI76695

  • Reported component name

    CLEARCASE WIN

  • Reported component ID

    5724G2900

  • Reported release

    900

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-02-15

  • Closed date

    2017-09-13

  • Last modified date

    2017-12-19

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

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

Fix information

  • Fixed component name

    CLEARCASE WIN

  • Fixed component ID

    5724G2900

Applicable component levels

  • R900 PSY

       UP

  • R901 PSY

       UP

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU029","label":"Software"},"Product":{"code":"SSSH27","label":"Rational ClearCase"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"900"}]

Document Information

Modified date:
17 June 2021