IV20295: SYSTEM CRASH IN NETINFO_UNIXDOMNLIST APPLIES TO AIX 7100-00

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Problem:
  System crash with following stack
  
  CRASH INFORMATION:
  CPU 3 CSA F00000002FF47600 at time of crash, error code
  for
  LEDs: 30000000
  pvthread+02BD00 STACK:
  [00009500].simple_lock+000000 ()
  [00450E24]netinfo_unixdomnlist+000824 (??, ??, ??, ??,
  ??, ??)
  [0451214C]netinfo+00006C (??, ??, ??, ??, ??, ??)
  [004504DC]netinfo+0000FC (??, ??, ??, ??)
  [00003850]ovlya_addr_sc_flih_main+000130 ()
  [kdb_get_virtual_memory] no real storage @
  FFFFFFFFFFFEF20
  [100002640]0000000100002640 ()
  [kdb_read_mem] no real storage @ FFFFFFFFFFF5E30
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:
  * Users of the 7100-00 Technology Level.
  *
  ****************************************************************
  * PROBLEM DESCRIPTION:
  * If a lot of file operations are happening in the system, there
  * is a possibility that the same file pointer is reused and that
  * may be different type ( For example VNODE). This can cause a
  * system crash in netinfo_unixdomnlist.
  ****************************************************************
  * RECOMMENDATION:
  * Install APAR IV20295.
  ****************************************************************
  

Problem conclusion

• File lock is taken before checking whether the file type is
  socket. This change will avoid taking socket lock on non
  socket files and prevents the system from crash.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

• 6100-05 - use AIX APAR IV12592
  6100-06 - use AIX APAR IV09793
  6100-07 - use AIX APAR IV09981
  6100-07 - use AIX APAR IV09981
  6100-08 - use AIX APAR IV10663
  7100-00 - use AIX APAR IV20295
  7100-00 - use AIX APAR IV20295
  7100-01 - use AIX APAR IV09942
  

APAR Information

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

  IV09793

• 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 U850502

     UP12/06/20 I 1000

PTF to Fileset Mapping

• U850502 bos.mp64 7.1.0.19