Kernel panics in dfp_ioctl32()

Solution Unverified - Updated -

Issue

  • Either of below errors is observed at the time of the occurrence of kernel panic.
Kernel panic - not syncing: IOCTL ERROR

Kernel panic - not syncing: DNCWARE Disk WatchDog: Timeout error was detected.

Kernel panic - not syncing: DNCWARE Disk WatchDog: I/O error was detected.

crash> bt
PID: 17667  TASK: ffff8105a9ea7820  CPU: 3   COMMAND: "hadkwd"
 #0 [ffff8105a1181cf0] crash_kexec at ffffffff800b0938
 #1 [ffff8105a1181db0] panic at ffffffff80093987
 #2 [ffff8105a1181ea0] dfp_ioctl32 at ffffffff886941bd [dfp]
 #3 [ffff8105a1181f20] compat_sys_ioctl at ffffffff800ff5f4
 #4 [ffff8105a1181f80] sysenter_do_call at ffffffff800614b5
    RIP: 00000000ffffe410  RSP: 00000000ff8c596c  RFLAGS: 00000296
    RAX: ffffffffffffffda  RBX: ffffffff800614b5  RCX: 00000000ffffeeee
    RDX: 00000000ff8c5b34  RSI: 00000000004f9ca0  RDI: 0000000000000000
    RBP: 0000000000000000   R8: 0000000000000000   R9: 0000000000000000
    R10: 0000000000000000  R11: 0000000000000000  R12: 0000000000000000
    R13: 0000000000000000  R14: 0000000000000000  R15: 00000000ff8c5b78
    ORIG_RAX: 0000000000000036  CS: 0023  SS: 002b

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • DNCWARE (dfp.ko module)

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