IV66988: NON-INITIALIZED ARRAYS CAUSE CORE DUMP IN NMON APPLIES TO AIX 6100-09

APAR status

• Closed as program error.

Error description

• topas_nmon core dump with below stack:
  (dbx) where
  strlen() at 0xd0105880
  _doprnt(??, ??, ??) at 0xd0133c10
  fprintf(0xf082e2a0, 0x300027d8, 0x2ff30030, 0x7f7f0000,
  0x0, 0x11a60065,0x11a60065, 0x2ff2fff0) at 0xd012bfb4
  find_sea_child() at 0x1004cebc
  print_headers(??, ??, ??) at 0x10015288
  nmon_loop(??) at 0x1001043c
  nmon_main(??, ??) at 0x10010f44
  expand_args(??, ??) at 0x10012908
  nmon_main(??, ??) at 0x100110e4
  main(??, ??) at 0x10001b74
  

Local fix

Problem summary

• topas_nmon core dump with following stack:
  strlen() at 0xd0105880
  _doprnt(??, ??, ??) at 0xd0133c10
  fprintf(0xf082e2a0, 0x300027d8, 0x2ff30030, 0x7f7f0000,
  0x0, 0x11a60065,0x11a60065, 0x2ff2fff0) at 0xd012bfb4
  find_sea_child() at 0x1004cebc
  print_headers(??, ??, ??) at 0x10015288
  nmon_loop(??) at 0x1001043c
  nmon_main(??, ??) at 0x10010f44
  expand_args(??, ??) at 0x10012908
  nmon_main(??, ??) at 0x100110e4
  main(??, ??) at 0x10001b74
  

Problem conclusion

• The array is initialized to avoid garbage value to avoid
  crash.
  

Temporary fix

Comments

• 6100-09 - use AIX APAR IV66988
  7100-03 - use AIX APAR IV69810
  

APAR Information

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

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

  IV69810 IV71127

Fix information

• Fixed component name

  VIRTUAL I/O SER

• Fixed component ID

  5765G3400

Applicable component levels