write access attempted on read-only area 0x15 at 0x8002eba9
vm_page_fault: vm_soft_fault returned error 'Permission denied' on fault at 0x8002eba9, ip 0x80068ed4, write 1, user 0, thread 0x8
PANIC: vm_page_fault: unhandled page fault in kernel space at 0x8002eba9, ip 0x80068ed4

Welcome to Kernel Debugging Land...
Running on CPU 0
kdebug> where
where
stack trace for thread 8 "block notifier/writer"
    kernel stack: 0x8013d000 to 0x80141000
frame            caller     <image>:function + offset
80140a6c (+  52) 8008a9ab   <kernel>:invoke_debugger_command + 0x00cf
80140aa0 (+  64) 8008b74c   <kernel>:_ParseCommand__16ExpressionParserRi + 0x01f8
80140ae0 (+  48) 8008b13e   <kernel>:EvaluateCommand__16ExpressionParserPCcRi + 0x01de
80140b10 (+ 228) 8008c860   <kernel>:evaluate_debug_command + 0x0088
80140bf4 (+  64) 800894ee   <kernel>:kernel_debugger_loop__Fv + 0x017a
80140c34 (+  48) 8008a199   <kernel>:kernel_debugger + 0x010d
80140c64 (+ 192) 8008a081   <kernel>:panic + 0x0029
80140d24 (+  64) 800617d7   <kernel>:vm_page_fault + 0x00ab
80140d64 (+  64) 8009707d   <kernel>:page_fault_exception + 0x00b1
80140da4 (+  12) 8009a75d   <kernel>:int_bottom + 0x001d (nearest)
iframe at 0x80140db0 (end = 0x80140e08)
 eax 0x90ff3800     ebx 0x90aedba4      ecx 0x90aedba4   edx 0x8002eba9
 esi 0x90e606c4     edi 0x40            ebp 0x80140e48   esp 0x80140de4
 eip 0x80068ed4  eflags 0x10286    
 vector: 0xe, error code: 0x3
80140db0 (+ 152) 80068ed4   <kernel>:flush_pending_notifications__FP11block_cache + 0x00e8
80140e48 (+  64) 80069029   <kernel>:flush_pending_notifications__Fv + 0x0069
80140e88 (+ 336) 8006b0d5   <kernel>:block_notifier_and_writer__FPv + 0x0055
80140fd8 (+  32) 800390db   <kernel>:_create_kernel_thread_kentry__Fv + 0x001b
80140ff8 (+2146168840) 80039070   <kernel>:thread_kthread_exit__Fv + 0x0000
kdebug> thread 8
THREAD: 0x90d4e800
id:                 8 (0x8)
name:               "block notifier/writer"
all_next:           0x00000000
team_next:          0x90d44000
q_next:             0x800da120
priority:           5 (next 5)
state:              running
next_state:         ready
cpu:                0x800eda00 (0)
sig_pending:        0x0 (blocked: 0x0)
in_kernel:          1
sem blocking:       -1
condition variable: 0x00000000
fault_handler:      0x8008a9c0
args:               0x00000000 0x00000000
entry:              0x8006b080
team:               0x90d1b780, "kernel_team"
  exit.sem:         175
  exit.status:      0x0 (No error)
  exit.reason:      0x0
  exit.signal:      0x0
  exit.waiters:
kernel_stack_area:  80
kernel_stack_base:  0x8013d000
user_stack_area:    -1
user_stack_base:    0x00000000
user_local_storage: 0x00000000
kernel_errno:       0x0 (No error)
kernel_time:        17467995
user_time:          0
flags:              0x0
architecture dependant section:
	esp: 0x80140a68
	ss: 0x00000010
	fpu_state at 0x90d4eb80
kdebug>