IJ54983: CES NODES CRASH WHEN THERE ARE NFS IOS ON FILE SYSTEMS WITH FILE AUDIT LOGGING ENABLED

APAR status

• Closed as program error.

Error description

• File Audit Logging uses an internal data structure to keep track
  of NFS client ip addresses for NFS IOs coming from Ganesha.The
  CES nodes can crash during garbage collection of this structure
  due to a race condition caused by a use-after-free error.
  

Local fix

• - Disable File Audit Logging, or
  - Avoid NFS IOs when FAL is enabled
  

Problem summary

• File Audit Logging uses an internal data structure to keep track
  of NFS client ip addresses for NFS IOs coming from Ganesha.
  The CES nodes can crash during garbage collection of this
  structure due to a race condition caused by a use-after-free
  error.
  

Problem conclusion

• This problem is fixed in 5.2.3.1
  To see all Spectrum Scale APARs and their respective
  Fix solutions refer to page: 
  https://public.dhe.ibm.com/storage/spectrumscale/spectrum_scale
  _apars.html
  
  Benefits of the solution:
  Fixed the code so that crashing no longer occurs.
  
  Work Around:
  - Disable File Audit Logging, or
  - Avoid NFS IOs when FAL is enabled
  
  Problem trigger:
  - File audit logging is enabled on a file system with NFS
  Ganesha running.
  - Large amount of IOs running to NFS exports.
  
  Symptom:
  Abend/Crash
  
  Platforms affected:
  Linux
  
  Functional Area affected:
  File Audit Logging, NFS
  
  Customer Impact:
  High Importance
  

Temporary fix

Comments

APAR Information

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

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

Fix information

• Fixed component name

  SPEC SCALE STD

• Fixed component ID

  5737F33AP

Applicable component levels