PM29587: Reference count issue between MVFS mnode and NFS vnode causes a panic on release of an mnode with a bad vnode reference

Rational ClearCase Fix Pack 03 (8.0.0.3) for 8.0
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 13 (8.0.0.13) for 8.0
Rational ClearCase Fix Pack 14 (8.0.0.14) for 8.0
Rational ClearCase Fix Pack 15 (8.0.0.15) for 8.0
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 unreproducible in next release.

Error description

• Reference count issue between MVFS mnode and NFS vnode causes a
  panic on release of an mnode with a bad vnode reference
  
  
  ClearCase 7.0.1.9
  
  AIX 6.1TL3
  
  Backtrace:
  CRASH INFORMATION:
  CPU 13 CSA F00000002FF47600 at time of crash, error code for
  LEDs:
  70000000
  pvthread+01FE00 STACK:
  [04FE38AC]nfs.ext:nfs_check_close_for_dio_cio@AF123_76+00008C
  (0000000000000000, 0000000004000001 [??])
  [05099454]nfs.ext:nfs3_close+000214 (??, ??, ??, ??, ??, ??)
  [04FD335C]nfs.ext:aix2onc_close+00007C (??, ??, ??, ??)
  [004BDBD4]vnop_close+000094 (??, ??, ??, ??)
  [052C60E4]mvfs.o:mfs_aix_vnop_close+000040 (F100011030754838,
  0400000104000001,
   0000000100000001, 0000000000000000, F100011022CE1C7C)
  [052D8168]mvfs.o:mvfs_closev_ctx+000210 (F100010069D283D0,
  0400000104000001,
   0000000100000001, 0000000000000000, F100011022CE1C7C,
  0000000000000000)
  [052D6E20]mvfs.o:mfs_closev+000048 (F100010069D283D0,
  0400000104000001
   0000000100000001, 0000000000000000, F100011022CE1C7C)
  [052C3C58]mvfs.o:mfs_aix_close+000034 (F100010069D283D0,
  0000000004000001,
   0000000000000000, F100011022CE1C7C)
  [004BDBD4]vnop_close+000094 (??, ??, ??, ??)
  [005267D0]vno_close+000050 (??)
  [0053FF44]closef+000064 (??)
  [004A0E98]closefd+0000F8 (??, ??)
  [004A12AC]closex+0002AC (??, ??)
  [004A159C]close+00011C (??)
  [00003844].svc_instr+000144 ()
  
  Workaround:  None
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Reference count issue between MVFS mnode and NFS vnode causes a
  panic on release of an mnode with a bad vnode reference.
  

Problem conclusion

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 PSY

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