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

Fixes are available

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

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSSH3S","label":"Rational ClearCase MultiSite"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.1.2","Edition":"","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
24 September 2013

Tips

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

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

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

Fixed component ID

Applicable component levels

R712 PSN

Document Information

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