IV38802: CIFS_FS CRASH IN SMBFS_SEARCH_TREE APPLIES TO AIX 6100-08

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A system crash may occur if a CIFS file system
  is unmounted at the same time as another thread
  searches for a file in that file system.  The
  stack trace of the crashing thread will be
  similar to the one below and must contain both
  lookuppn and cn_lookup for this situation to
  apply.  (Other functions on the stack may vary.)
  
  [0000BD24].lock_read+000004 ()
  [F1000000C02DFB18]smbfs_search_tree+000078 (??, ??, ??,
  ??, ??, ??)
  [F1000000C02C6808]cn_lookup+000208 (??, ??, ??, ??, ??,
  ??)
  [00014D70].hkey_legacy_gate+00004C ()
  [0059DE44]vnop_lookup+000184 (??, ??, ??, ??, ??, ??)
  [0055FF24]lookuppn+000A04 (??, ??, ??, ??, ??, ??, ??,
  ??)
  [005606E0]lookupname_internal+0000A0 (??, ??, ??, ??, ??,
  ??, ??, ??)
  [00560804]lookupname_cur+000024 (??, ??, ??, ??, ??, ??,
  ??)
  [00786DAC]accessx+0002AC (??, ??, ??)
  

Local fix

Problem summary

• A system crash may occur if a CIFS file system
  is unmounted at the same time as another thread
  searches for a file in that file system
  

Problem conclusion

• Added locks where necessary to prevent concurrent access issues
  

Temporary fix

Comments

• 6100-06 - use AIX APAR IV40914
  6100-07 - use AIX APAR IV35679
  6100-08 - use AIX APAR IV38802
  7100-00 - use AIX APAR IV41542
  7100-01 - use AIX APAR IV36839
  7100-02 - use AIX APAR IV38838
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV35679

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  AIX 610 STD EDI

• Fixed component ID

  5765G6200

Applicable component levels

• R610 PSY U855973

     UP13/08/02 I 1000

PTF to Fileset Mapping

• U855973 bos.cifs_fs.rte 6.1.8.16