IV92704: system crash on kernel heap page storage key exception APPLIES TO AIX 7200-00

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• System can crash with the following stack trace:
  
  CRASH INFORMATION:
  CPU 0 CSA F00000002FF47600 at time of crash, error code
  for LEDs:
  70000000
  pvthread+029E00 STACK:
  [0001C040] ()
  [000DAF04]xmdbg_do_xmalloc_record+0003C4
  (F1000A05B02A0000,
  F1000A05B0000170,
     0000001F0000001F, 0000000000010000, 0000000000010000,
  0000004100000041,
     0000000100000001, F1000A0073D75480)
  [005D6430]xmalloc_backend+000890 (0000000000010000,
  0000000000000000
     F1000A05B0000170, F1000A05B00B0000, 0000004100000041,
  FFFFFFFFFFFFFFFF)
  [005D708C]xmalloc+0002EC (??, ??, ??)
  [002CEDA8]pile_add_slab_with_lock+000048 (??, ??, ??)
  [002CF7B0]pile_alloc+000150 (??, ??)
  [002DAEA0]iAlloc+000500 (??, ??)
  [002E0E3C]iGet+00155C (??, ??, ??, ??, ??)
  [002DE590]iCreate+000090 (??, ??, ??, ??, ??, ??, ??)
  [003678FC]j2_create+00075C (??, ??, ??, ??, ??, ??, ??,
  ??)
  [00600504]vnop_create_attr+000144 (??, ??, ??, ??, ??,
  ??, ??, ??)
  [00656278]openpnp+000418 (??, ??, ??, ??, ??, ??)
  [00656A00]openpath+000100 (??, ??, ??, ??, ??, ??, ??)
  [00656ED4]copen+000294 (??, ??, ??, ??, ??)
  [00655DDC]kopen+00001C (??, ??, ??)
  [00003888] ()
  [kdb_get_virtual_memory] no real storage @
  FFFFFFFFFFFA7C0
  [9000000000924FC] ()
  [kdb_read_mem] no real storage @ FFFFFFFFFFF5DC0
  
  Kernel Abend code can be ESYSERROR_XMDXR_PHKEY .
  
  The following stack trace can also be seen:
  CRASH INFORMATION:
  CPU 0 CSA F000000030033600 at time of crash, error code
  for LEDs: 300
  00
  pvthread+01D900 STACK:
  006DF52C|init_heap1+00078C
  006E017C|init_heapx+0001FC
  006DFAD0|xm_heapalloc+000150 (??, ??, ??, ??, ??)
  005F9EAC|xmalloc_backend+0004EC
  005FAE20|xmalloc+0002E0 (??, ??, ??)
  002CB088|pile_add_slab_with_lock+000048 (??, ??, ??)
  002CBAB0|pile_alloc+000150 (??, ??)
  002DB760|iAlloc+000560 (??, ??)
  002E1AC4|iGet+001724 (??, ??, ??, ??, ??)
  002DEFD8|iCreate+000098 (??, ??, ??, ??, ??, ??, ??)
  0036E8BC|j2_create+00073C (??, ??, ??, ??, ??, ??, ??,
  ??)
  0066B88C|vnop_create_attr+00014C (??, ??, ??, ??, ??, ??,
  ??, ??)
  006777E8|openpnp+0005A8 (??, ??, ??, ??, ??, ??, ??, ??)
  0067808C|openpath+00028C (??, ??, ??, ??, ??, ??, ??, ??)
  00678454|copen+000314
  006771C4|kopen+000024 (??, ??, ??)
  00003938|syscall+000230 ()
  

Local fix

• N/A
  

Problem summary

• Crash with the following stack signature:
  006DF52C|init_heap1+00078C
  006E017C|init_heapx+0001FC
  006DFAD0|xm_heapalloc+000150 (??, ??, ??, ??, ??)
  005F9EAC|xmalloc_backend+0004EC
  005FAE20|xmalloc+0002E0 (??, ??, ??)
  002CB088|pile_add_slab_with_lock+000048 (??, ??, ??)
  002CBAB0|pile_alloc+000150 (??, ??)
  002DB760|iAlloc+000560 (??, ??)
  002E1AC4|iGet+001724 (??, ??, ??, ??, ??)
  002DEFD8|iCreate+000098 (??, ??, ??, ??, ??, ??, ??)
  0036E8BC|j2_create+00073C (??, ??, ??, ??, ??, ??, ??, ??)
  0066B88C|vnop_create_attr+00014C
  006777E8|openpnp+0005A8 (??, ??, ??, ??, ??, ??, ??, ??)
  0067808C|openpath+00028C (??, ??, ??, ??, ??, ??, ??, ??)
  00678454|copen+000314
  006771C4|kopen+000024 (??, ??, ??)
  00003938|syscall+000230 ()
  

Problem conclusion

• Ensure that all pages in a newly initialized range are created
  with keys that are appropriate for the new range.
  

Temporary fix

Comments

APAR Information

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

  IV90605

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

Fix information

• Fixed component name

  AIX V7.2

• Fixed component ID

  5765CD200

Applicable component levels

• R720 PSY U873969

     UP17/04/10 I 1000

PTF to Fileset Mapping

• U873969 bos.mp64 7.2.0.4

• U873969 bos.mp64 7.2.0.4