IZ79696: NFS V4 CLNT CRASHED AT ___MEMMOVE64+000014 AFTER FILE REMOVE APPLIES TO AIX 6100-06

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• nfsv4 client crash when doing a force unmount
  the stack trace looks like
  KDB(3)> f
  pvthread+053100 STACK:
  ￭0000F414___memmove64+000014 ()
  ￭0503EF54nfs4_update_state_info+0001F4 (??, ??, ??, ??)
  ￭0505D32Cnfs4_open_create+0007CC (??, ??, ??, ??, ??, ??,
  ??, ??)
  ￭04FD0EB8nfs4_create_attr+000158 (??, ??, ??, ??, ??, ??,
  ??, ??)
  ￭005D38A4vnop_create_attr+000144 (??, ??, ??, ??, ??, ??,
  ??, ??)
  ￭00617D78openpnp+000418 (??, ??, ??, ??, ??, ??)
  ￭00618500openpath+000100 (??, ??, ??, ??, ??, ??, ??)
  ￭006189D4copen+000294 (??, ??, ??, ??, ??)
  ￭006178DCkopen+00001C (??, ??, ??)
  ...
  Where nfs4_update_state_info() is copy the data into a freed
  memory. The memory got free right before the copy. One should
  be able to find who freed the memory in the memory trace.
  

Local fix

Problem summary

• nfsv4 client crash when doing a force unmount
  the stack trace looks like
  KDB(3)> f
  pvthread+053100 STACK:
   0000F414 ___memmove64+000014 ()
   0503EF54 nfs4_update_state_info+0001F4 (??, ??, ??, ??)
   0505D32C nfs4_open_create+0007CC (??, ??, ??, ??, ??, ??,
  ??, ??)
   04FD0EB8 nfs4_create_attr+000158 (??, ??, ??, ??, ??, ??,
  ??, ??)
   005D38A4 vnop_create_attr+000144 (??, ??, ??, ??, ??, ??,
  ??, ??)
   00617D78 openpnp+000418 (??, ??, ??, ??, ??, ??)
   00618500 openpath+000100 (??, ??, ??, ??, ??, ??, ??)
   006189D4 copen+000294 (??, ??, ??, ??, ??)
   006178DC kopen+00001C (??, ??, ??)
  ...
  Where nfs4_update_state_info() is copy the data into a freed
  memory. The memory got free right before the copy. One should
  be able to find who freed the memory in the memory trace.
  

Problem conclusion

• take rnode's rstate_lock when updating the rs_open_name
  

Temporary fix

Comments

• 6100-04 - use AIX APAR IZ79091
  6100-05 - use AIX APAR IZ78769
  6100-06 - use AIX APAR IZ78446
  6100-06 - use AIX APAR IZ79696
  7100-00 - use AIX APAR IZ79374
  

APAR Information

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

  IZ78446

• 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 U835918

     UP11/05/10 I 1000

PTF to Fileset Mapping

• U835918 bos.net.nfs.client 6.1.6.15