IJ48001: DSI IN XFIDTONAME DUE TO UNINITIALIZED VNODE POINTER APPLIES TO AIX 7300-03

APAR status

• Closed as program error.

Error description

• Potential crash on invalid address page fault in
  xfidToName when the target
  file system is being unmounted. The crash happens when
  vnop_rele() is called
  with an uninitialized pointer:
  
  CRASH INFORMATION:
  CPU 72 CSA F00000002FF47600 at time of crash, error code
  for LEDs: 30000000
  pvthread+276D00 STACK:
  [00014D00]._ptrgl+000000 ()
  [007570B8]vnop_rele+000078
  [007EBF9C]xfidToName@AF19_14+00007C
  [00014F50].kernel_add_gate_cstack+000030 ()
  [F1000915904D56A4]sgavdd:open_callout.part.9+0000F4
  [00014D70].hkey_legacy_gate+00004C ()
  [007E9984]IPRA.$fskvOpen+0000C4
  [007EA614]IPRA.$openpnp+000B94
  [007EAAA0]IPRA.$openpath+0002A0
  [007EAEBC]copen+00033C
  [007E9844]kopen+000024
  
  Exception virt addr    =  2C3F000041820060
  Exception value        =  0000000E  ERRNO_EFAULT
  

Local fix

Problem summary

• Potential crash on invalid address page fault in
  xfidToName when the target file system is being
  unmounted. The crash happens when vnop_rele() is c
  alled with an uninitialized pointer:
  
  CRASH INFORMATION:
  CPU 72 CSA F00000002FF47600 at time of crash, error code
  for LEDs: 30000000
  pvthread+276D00 STACK:
   00014D00 ._ptrgl+000000 ()
   007570B8 vnop_rele+000078
   007EBF9C xfidToName@AF19_14+00007C
   00014F50 .kernel_add_gate_cstack+000030 ()
   F1000915904D56A4 sgavdd:open_callout.part.9+0000F4
   00014D70 .hkey_legacy_gate+00004C ()
   007E9984 IPRA.$fskvOpen+0000C4
   007EA614 IPRA.$openpnp+000B94
   007EAAA0 IPRA.$openpath+0002A0
   007EAEBC copen+00033C
   007E9844 kopen+000024
  
  Exception virt addr    =  2C3F000041820060
  Exception value        =  0000000E  ERRNO_EFAULT
  

Problem conclusion

• Initialize vnode pointer in crashed function to
  avoide invalid address page faults.
  

Temporary fix

Comments

APAR Information

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

  IJ47592

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

Fix information

• Fixed component name

  AIX V7.3

• Fixed component ID

  5765CD300

Applicable component levels