PM70152: ClearCase MVFS panics when executing updatedb from within a view extended path

Rational ClearCase Fix Pack 09 (7.1.2.9) for 7.1.2
Rational ClearCase Fix Pack 05 (8.0.0.5) for 8.0
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 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 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 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 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 17 (8.0.0.17) for 8.0
Rational ClearCase Fix Pack 18 (8.0.0.18) for 8.0
Rational ClearCase Fix Pack 19 (8.0.0.19) for 8.0
Rational ClearCase Fix Pack 20 (8.0.0.20) for 8.0
Rational ClearCase Fix Pack 21 (8.0.0.21) for 8.0

APAR status

• Closed as program error.

Error description

• ClearCase MVFS panics when executing updatedb from within a view
  extended path
  
  
  ClearCase 7.1.2.5
  
  RedHat 6 Update 1 + errata
     2.6.32-131.0.15.el6.x86_64 #1 SMP x86_64
  
  
  Panic Backtrace:
  
  crash? bt
  PID: 16057  TASK: ffff880c077d8100  CPU: 13  COMMAND: 'updatedb'
   #0 [ffff8806b53bb7c0] machine_kexec at ffffffff810310db
   #1 [ffff8806b53bb820] crash_kexec at ffffffff810b63b2
   #2 [ffff8806b53bb8f0] oops_end at ffffffff814dec50
   #3 [ffff8806b53bb920] no_context at ffffffff81040cdb
   #4 [ffff8806b53bb970] __bad_area_nosemaphore at
  ffffffff81040f65
   #5 [ffff8806b53bb9c0] bad_area_nosemaphore at ffffffff81041033
   #6 [ffff8806b53bb9d0] __do_page_fault at ffffffff8104170d
   #7 [ffff8806b53bbaf0] do_page_fault at ffffffff814e0c3e
   #8 [ffff8806b53bbb20] page_fault at ffffffff814ddfe5
      [exception RIP: kern_addr_valid+194]
      RIP: ffffffff8103f842  RSP: ffff8806b53bbbd8  RFLAGS:
  00010202
      RAX: 000034756f726000  RBX: ffff880c3fcb0100  RCX:
  00003ffffffff000
      RDX: 000034756f726580  RSI: ffff880000000000  RDI:
  6e6974756f726275
      RBP: ffff8806b53bbbd8   R8: ffff880c06f3fbc0   R9:
  0000000000000033
      R10: 0000000000000051  R11: ffff8806b53bbc48  R12:
  ffff880fbf8b0b00
      R13: 00000000000000c0  R14: ffff880ac0d4dd38  R15:
  ffff880c05b12540
      ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
   #9 [ffff8806b53bbbe0] kmem_ptr_validate at ffffffff81159a8e
  #10 [ffff8806b53bbc10] d_validate at ffffffff8118a74e
  #11 [ffff8806b53bbc40] vnode_dop_revalidate at ffffffffa04a79bd
  [mvfs]
  #12 [ffff8806b53bbce0] __link_path_walk at ffffffff81180ad4
  #13 [ffff8806b53bbd60] path_walk at ffffffff811815fa
  #14 [ffff8806b53bbda0] do_path_lookup at ffffffff811817cb
  #15 [ffff8806b53bbdd0] user_path_at at ffffffff81181957
  #16 [ffff8806b53bbea0] vfs_fstatat at ffffffff81177c7c
  #17 [ffff8806b53bbee0] vfs_lstat at ffffffff81177d2e
  #18 [ffff8806b53bbef0] sys_newlstat at ffffffff81177d54
  #19 [ffff8806b53bbf80] system_call_fastpath at ffffffff8100b172
      RIP: 0000003f688d8f55  RSP: 00007fffa7982588  RFLAGS:
  00010216
      RAX: 0000000000000006  RBX: ffffffff8100b172  RCX:
  000000000000004a
      RDX: 00007fffa79826e0  RSI: 00007fffa79826e0  RDI:
  000000000040775b
      RBP: 0000000000af58a9   R8: 00000000004033f0   R9:
  0000000000af58a0
      R10: 0000000000000051  R11: 0000000000000246  R12:
  00007fffa7982890
      R13: 00007fffa7982b28  R14: 00007fffa7982b28  R15:
  00007fffa7982890
      ORIG_RAX: 0000000000000006  CS: 0033  SS: 002b
  
  
  Workaround:  Set to a view prior to executing updatedb OR do not
  execute updatedb within a view extended path
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A ClearCase user on Linux could encounter Linux kernel
  panics in the kmem_ptr_validate kernel function.
  

Problem conclusion

• This problem is fixed in The 7.1.2.09 and 8.0.0.05 versions
  of ClearCase.
  

Temporary fix

Comments

APAR Information

• 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 UNIX

• Fixed component ID

  5724G2901

Applicable component levels

• R712 PSN

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