IZ82417: NFS V4 CLIENT CRASHED WITH ABEND_TRAP APPLIES TO AIX 5300-09

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• nfs v4 client crashed with abend_trap. r3 has kerrno of
  EEEE00009660101B. the stack trace looks like
  KDB(0)> f
  pvthread+02F000 STACK:
  ￭00022000abend_trap+000000 ()
  ￭066663D0add_putfh+000330 (??, ??, ??)
  ￭066C9A8Cnfs4fhlookup+00046C (??, ??, ??, ??)
  ￭066BE874nfs4fhlookup_n4bg+000034 (??)
  ￭002810D4threadentry+000054 (??, ??, ??, ??)
  
  The current working vp within nfs4fhlookup has hold of 0 and
  the work item structure has been freed. In the memory trace,
  it indicated the work item got added via nfs4_put_work() but
  user did a control+C which will remove the work item via
  nfs4_rm_work(). But the worker still got its hand on the
  work item and start working on it. Therefor it crashed
  

Local fix

Problem summary

• nfs v4 client crashed with abend_trap. r3 has kerrno of
  EEEE00009660101B. the stack trace looks like
  KDB(0)> f
  pvthread+02F000 STACK:
   00022000 abend_trap+000000 ()
   066663D0 add_putfh+000330 (??, ??, ??)
   066C9A8C nfs4fhlookup+00046C (??, ??, ??, ??)
   066BE874 nfs4fhlookup_n4bg+000034 (??)
   002810D4 threadentry+000054 (??, ??, ??, ??)
  
  The current working vp within nfs4fhlookup has hold of 0 and
  the work item structure has been freed. In the memory trace,
  it indicated the work item got added via nfs4_put_work() but
  user did a control+C which will remove the work item via
  nfs4_rm_work(). But the worker still got its hand on the
  work item and start working on it. Therefor it crashed
  

Problem conclusion

• in nfs4_rm_work(), get the content of GV(nfs4_work_queue)
  after we take the nfs4_work_queue_lock instead of before.
  

Temporary fix

Comments

• 5300-09 - use AIX APAR IZ82417
  5300-10 - use AIX APAR IZ82591
  5300-11 - use AIX APAR IZ82428
  5300-12 - use AIX APAR IZ81662
  6100-02 - use AIX APAR IZ79749
  6100-03 - use AIX APAR IZ79354
  6100-04 - use AIX APAR IZ78919
  6100-05 - use AIX APAR IZ78693
  6100-06 - use AIX APAR IZ77811
  6100-06 - use AIX APAR IZ77278
  6100-06 - use AIX APAR IZ77811
  7100-00 - use AIX APAR IZ79918
  

APAR Information

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

  IZ77278

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

Fix information

• Fixed component name

  AIX 5.3

• Fixed component ID

  5765G0300

Applicable component levels

• R530 PSY U837730

     UP10/09/21 I 1000

PTF to Fileset Mapping

• U837730 bos.net.nfs.client 5.3.9.7