IV87043: CRASH IN XHCI_OPEN WHEN ACCESSING /DEV/USBHC0 APPLIES TO AIX 7100-03

APAR status

• Closed as program error.

Error description

• System crash with a stack such as the following:
  
  CRASH INFORMATION:
  CPU 44 CSA F00000002FF47600 at time of crash, error code
  for LEDs: 70000000
  pvthread+19B800 STACK:
  [00016614]larx_patch_candseh+00000C ()
  [005BDD5C]slock+00047C (??, ??)
  [00009558].simple_lock+000058 ()
  [0631C754]xhci_open+000174 (??, ??, ??, ??)
  [005E1980]devcopen+000480 (??, ??, ??, ??, ??)
  [005E24A0]rdevopen+000140 (??, ??, ??, ??, ??)
  [0086748C]cdev_open+00006C (F1000A038067F030,
  0400000104000001,
     0000000000000000)
  [007D7FBC]spec_open+0001BC (??, ??, ??, ??, ??)
  [0066FD18]vnop_open+0004F8 (??, ??, ??, ??, ??)
  [00677984]openpnp+000744 (??, ??, ??, ??, ??, ??, ??, ??)
  [0067808C]openpath+00028C (??, ??, ??, ??, ??, ??, ??,
  ??)
  [00678454]copen+000314 (FFFFFFFEFFFFFFFE,
  0000000122DDE9E0,
     0000000004000000, 0000000000000000, 0000000000000000,
  F00000002FF47260)
  [006771C4]kopen+000024 (??, ??, ??)
  [00003938]syscall+000230 ()
  

Local fix

• Remove public read/write access for /dev/usbhc
  # chmod 660 /dev/usbhc
  

Problem summary

• when a non-root user open USB3.0 adapter, sysem crashes
  

Problem conclusion

• When a failure occurs during open, failure code is handled
  properly
  

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:

  IV87293 IV87303 IV87308 IV87309 IV87342 IV88062

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U872411

     UP17/01/19 I 1000