IV21044: CIFS_FS CRASH IN LOCK_READ_PPC OR LOCK_WRITE_PPC APPLIES TO AIX 7100-00

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The system crashes with a Program Interrupt in
  lock_read_ppc or lock_write_ppc where the calling
  module is nsmbdd (cifs_fs).  The stack trace is
  similar to this:
  
  [0001BF20]abend_trap+000000 ()
  [00546FEC]lock_read_ppc+0008EC (??)
  [F1000000C02D9B18]nsmbdd:smbfs_search_tree+000078 (??,
  ??, ??, ??, ??, ??)
  [F1000000C02C0808]nsmbdd:cn_lookup+000208 (??, ??, ??,
  ??, ??, ??)
  [00014D70].hkey_legacy_gate+00004C ()
  [0059CA64]vnop_lookup+000184 (??, ??, ??, ??, ??, ??)
  [0055EE44]lookuppn+000A04 (??, ??, ??, ??, ??, ??, ??,
  ??)
  [006485B0]openpnp+000190 (??, ??, ??, ??, ??, ??)
  [00648FC0]openpath+000100 (??, ??, ??, ??, ??, ??, ??)
  [00649494]copen+000294 (??, ??, ??, ??, ??)
  [0064839C]kopen+00001C (??, ??, ??)
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:
  * Users of CIFS on the 7100-00 Technology Level with the
  * bos.cifs_fs.rte fileset at the 7.1.0.17 level.
  ****************************************************************
  * PROBLEM DESCRIPTION:
  * The system crashes with a Program Interrupt in
  * lock_read_ppc or lock_write_ppc where the calling
  * module is nsmbdd (cifs_fs).  The stack trace is
  * similar to this:
  *
  *  0001BF20 abend_trap+000000 ()
  *  00546FEC lock_read_ppc+0008EC ()
  *  F1000000C02D9B18 nsmbdd:smbfs_search_tree+000078 ()
  *  F1000000C02C0808 nsmbdd:cn_lookup+000208 ()
  *  00014D70 .hkey_legacy_gate+00004C ()
  *  0059CA64 vnop_lookup+000184 ()
  *  0055EE44 lookuppn+000A04 ()
  *  006485B0 openpnp+000190 ()
  *  00648FC0 openpath+000100 ()
  *  00649494 copen+000294 ()
  *  0064839C kopen+00001C ()
  ****************************************************************
  * RECOMMENDATION:
  * Install APAR IV21044.
  ****************************************************************
  

Problem conclusion

• In cn_open(), release held locks during error condllions
  

Temporary fix

Comments

APAR Information

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

  IV14642

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

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U848223

     UP12/06/20 I 1000

PTF to Fileset Mapping

• U848223 bos.cifs_fs.rte 7.1.0.18