PM77414: Accessing a dynamic view via a Windows symlink cause a system crash

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
Rational ClearCase Fix Pack 20 (8.0.1.20) for 8.0.1
Rational ClearCase Fix Pack 21 (8.0.1.21) for 8.0.1
Rational ClearCase Fix Pack 22 (8.0.1.22) for 8.0.1
Rational ClearCase Fix Pack 23 (8.0.1.23) for 8.0.1
Rational ClearCase Fix Pack 24 (8.0.1.24) for 8.0.1
Rational ClearCase Fix Pack 25 (8.0.1.25) for 8.0.1

APAR status

• Closed as program error.

Error description

• When accessing or executing a program in a dynamic view via a
  Windows
  symbolic link, Windows crash with a BSOD in the MVFS. This is
  when using
  Microsoft NTFS symbolic link NOT ClearCase symbolic link.
  
  Reproduction step
  CC 8.0.0.4/7.1.2.x and Windows 7 64 bits
  As administrator:
  - Open an admin cmd.exe
  - Create or start a view and map it to a drive
      net use U: \\view\viewtag
  - Create the symbolic link from Windows filesystem to the view
  folder
      cd c:\temp
      mklink /D linked_folder U:\vobtag\folder
  - Cd into it form the C drive
      cd linked_folder
  - Attempt to execute the program or run a cleartool command
    (program is under source control in checkin)
      BSOD
  
  Not all programs or commands cause the crash. Some executable or
  ClearCase
  commands works fine, some not. It depends what the programs is
  doing on the
  filesystem. In the reproduction a simple 'cleartool ls' caused a
  BSDO.
  
  WORKAROUND:
  Microsoft symbolic link into the MVFS are NOT supported and
  should not
  be used.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of IBM Rational ClearCase dynamic views on Microsoft   *
  * Windows                                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * When accessing or executing an executable in a dynamic view  *
  * via an NTFS symbolic link, the system may receive an         *
  * unexpected STOP error message (BSOD).                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• Microsoft symbolic links are not currently supported by
  ClearCase dynamic views, however the problem which caused a
  system crash when accessing such a link is fixed in ClearCase
  versions 7.1.2.19, 8.0.0.16, and 8.0.1.9.
  

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 WIN

• Fixed component ID

  5724G2900

Applicable component levels

• R712 PSY

     UP

• R800 PSY

     UP

• R801 PSY

     UP