IBM Support

PM88940: MVFS causes kernel panic when performing path lookup on RHEL 6

Fixes are available

Rational ClearCase Fix Pack 12 (7.1.2.12) for 7.1.2
Rational ClearCase Fix Pack 8 (8.0.0.8) for 8.0
Rational ClearCase Fix Pack 1 (8.0.1.1) for 8.0.1
Rational ClearCase Fix Pack 14 (7.1.2.14) for 7.1.2
Rational ClearCase Fix Pack 11 (8.0.0.11) for 8.0
Rational ClearCase Fix Pack 4 (8.0.1.4) for 8.0.1
Rational ClearCase Fix Pack 5 (8.0.1.5) for 8.0.1
Rational ClearCase Fix Pack 12 (8.0.0.12) for 8.0
Rational ClearCase Fix Pack 15 (7.1.2.15) for 7.1.2
Rational ClearCase Fix Pack 6 (8.0.1.6) for 8.0.1
Rational ClearCase Fix Pack 13 (8.0.0.13) for 8.0
Rational ClearCase Fix Pack 16 (7.1.2.16) for 7.1.2
Rational ClearCase Fix Pack 17 (7.1.2.17) for 7.1.2
Rational ClearCase Fix Pack 14 (8.0.0.14) for 8.0
Rational ClearCase Fix Pack 7 (8.0.1.7) for 8.0.1
Rational ClearCase Fix Pack 18 (7.1.2.18) for 7.1.2
Rational ClearCase Fix Pack 15 (8.0.0.15) for 8.0
Rational ClearCase Fix Pack 8 (8.0.1.8) for 8.0.1
Rational ClearCase Fix Pack 19 (7.1.2.19) for 7.1.2
Rational ClearCase Fix Pack 16 (8.0.0.16) for 8.0
Rational ClearCase Fix Pack 9 (8.0.1.9) for 8.0.1
Rational ClearCase Fix Pack 17 (8.0.0.17) for 8.0
Rational ClearCase Fix Pack 10 (8.0.1.10) for 8.0.1
Rational ClearCase Fix Pack 18 (8.0.0.18) for 8.0
Rational ClearCase Fix Pack 11 (8.0.1.11) for 8.0.1
Rational ClearCase Fix Pack 19 (8.0.0.19) for 8.0
Rational ClearCase Fix Pack 12 (8.0.1.12) for 8.0.1
Rational ClearCase Fix Pack 20 (8.0.0.20) for 8.0
Rational ClearCase Fix Pack 13 (8.0.1.13) for 8.0.1
Rational ClearCase Fix Pack 21 (8.0.0.21) for 8.0
Rational ClearCase Fix Pack 14 (8.0.1.14) for 8.0.1
Rational ClearCase Fix Pack 15 (8.0.1.15) for 8.0.1
Rational ClearCase Fix Pack 16 (8.0.1.16) for 8.0.1
Rational ClearCase Fix Pack 17 (8.0.1.17) for 8.0.1
Rational ClearCase Fix Pack 18 (8.0.1.18) for 8.0.1
Rational ClearCase Fix Pack 19 (8.0.1.19) for 8.0.1

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • You may experience a kernel panic when performing operations in
    a dynamic view on Red Hat Enterprise Linux 6.x. The stack trace
    may resemble one of the following as called by do_path_lookup():
    
    #6 [ffff8801421d18c0] in_group_p at ffffffff8109aa01
     #7 [ffff8801421d18d0] acl_permission_check at ffffffff8118707d
     #8 [ffff8801421d1900] __link_path_walk at ffffffff811899e9
     #9 [ffff8801421d19c0] path_walk at ffffffff8118ab6a
    #10 [ffff8801421d1a00] vfs_path_lookup at ffffffff8118ac6e
    #11 [ffff8801421d1a30] mvop_linux_lookup_component at
    ffffffffa0442017 [mvfs]
    #12 [ffff8801421d1ab0] mvfs_lookup_ctx at ffffffffa0407490
    [mvfs]
    #13 [ffff8801421d1b40] mvfs_linux_lookup_wrapper at
    ffffffffa043c7a8 [mvfs]
    #14 [ffff8801421d1ba0] vnode_dop_revalidate at ffffffffa043dd63
    [mvfs]
    #15 [ffff8801421d1c40] do_lookup at ffffffff811895e6
    #16 [ffff8801421d1ca0] __link_path_walk at ffffffff81189abd
    #17 [ffff8801421d1d60] path_walk at ffffffff8118ab6a
    #18 [ffff8801421d1da0] do_path_lookup at ffffffff8118ad3b
    
     #6 [ffff88026d94b8f0] in_group_p at ffffffff81099601
     #7 [ffff88026d94b900] acl_permission_check at ffffffff811826bd
     #8 [ffff88026d94b930] __link_path_walk at ffffffff81185079
     #9 [ffff88026d94b9f0] path_walk at ffffffff811861fa
    #10 [ffff88026d94ba30] vfs_path_lookup at ffffffff811862fe
    #11 [ffff88026d94ba60] mvop_linux_lookup_component at
    ffffffffa040dc36 [mvfs]
    #12 [ffff88026d94bad0] mvfs_lookup_ctx at ffffffffa03d3490
    [mvfs]
    #13 [ffff88026d94bb60] mvfs_linux_lookup_wrapper at
    ffffffffa0408561 [mvfs]
    #14 [ffff88026d94bbc0] vnode_iop_lookup at ffffffffa040b7d2
    [mvfs]
    #15 [ffff88026d94bc50] do_lookup at ffffffff81184dcc
    #16 [ffff88026d94bca0] __link_path_walk at ffffffff8118514d
    #17 [ffff88026d94bd60] path_walk at ffffffff811861fa
    #18 [ffff88026d94bda0] do_path_lookup at ffffffff811863cb
    
     #9 [ffff880109421a00] mdki_linux_init_call_data at
    ffffffffa049d009 [mvfs]
    #10 [ffff880109421a20] mvfs_clear_inode at ffffffffa049aaec
    [mvfs]
    #11 [ffff880109421a60] clear_inode at ffffffff81190f4f
    #12 [ffff880109421a80] generic_drop_inode at ffffffff81191763
    #13 [ffff880109421aa0] iput at ffffffff81190612
    #14 [ffff880109421ac0] mdki_vn_rele at ffffffffa049c1f6 [mvfs]
    #15 [ffff880109421ad0] mvfs_lookup_ctx at ffffffffa045db80
    [mvfs]
    #16 [ffff880109421b60] mvfs_linux_lookup_wrapper at
    ffffffffa04927a8 [mvfs]
    #17 [ffff880109421bc0] vnode_iop_lookup at ffffffffa0495a6a
    [mvfs]
    #18 [ffff880109421c50] do_lookup at ffffffff81184a8c
    #19 [ffff880109421ca0] __link_path_walk at ffffffff81184e0d
    #20 [ffff880109421d60] path_walk at ffffffff81185eba
    #21 [ffff880109421da0] do_path_lookup at ffffffff8118608b
    
    This has been identified as a product defect.
    
    Steps to reproduce: Unknown.
    
    Workarounds: None known.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    You may experience a kernel panic when performing operations
    in a dynamic view on Red Hat Enterprise Linux 6.x.
    

Problem conclusion

  • A fix is available in ClearCase versions 7.1.2.12, 8.0.0.8
    and 8.0.1.1
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM88940

  • Reported component name

    CC&CC MSITE UNI

  • Reported component ID

    5724G3301

  • Reported release

    712

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-05-13

  • Closed date

    2013-09-24

  • Last modified date

    2013-09-24

  • 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

    CC&CC MSITE UNI

  • Fixed component ID

    5724G3301

Applicable component levels

  • R712 PSN

       UP



Document information

More support for: Rational ClearCase MultiSite

Software version: 7.1.2

Reference #: PM88940

Modified date: 24 September 2013