read enter 
Unable to handle kernel paging request at virtual address c4035020 
current->tss.cr3 = 03dcc000, %cr3 = 03dcc000 
*pde = 03f7a063 
*pte = 00000000 
Oops: 0000 
CPU:    0 
EIP:    0010:[sys_mremap+31/884] 
EFLAGS: 00010206 
eax: ffffffff   ebx: c3fefb00   ecx: c023e964   edx: c404d020 
esi: c4035020   edi: c404d020   ebp: c3fefb60   esp: c238dd28 
ds: 0018   es: 0018   ss: 0018 
Process insmod (pid: 658, process nr: 23, stackpage=c238d000) 
Stack: c238dd74 c238ddc8 00000020 00000020 ffffffe0 c3fefb6c c238dd50 00000000  
       00000020 00000004 00000020 c4049c30 c404d020 00000048 00000020 00002000  
       00000000 00000000 c4049d35 00000000 c025b5a0 c01cb0b1 00000000 0000000d  
Call Trace: 
[lockd:nlm4_granted_Rea24c726+123124/114388216] 
[lockd:nlm4_granted_Rea24c726+136420/114374920] 
[lockd:nlm4_granted_Rea24c726+123385/114387955] 
[fbcon_cfb24_putc+69/808] 
[lockd:nlm4_granted_Rea24c726+143844/114367496] 
[lockd:nlm4_granted_Rea24c726+130960/114380380] 
[lockd:nlm4_granted_Rea24c726+143588/114367752]  
[lockd:nlm4_granted_Rea24c726+127420/114383920] 
[lockd:nlm4_granted_Rea24c726+126445/114384895] 
[lockd:nlm4_granted_Rea24c726+126268/114385072] 
[lockd:nlm4_granted_Rea24c726+121676/114389664] 
[lockd:nlm4_granted_Rea24c726+120083/114391257] 
[lockd:nlm4_granted_Rea24c726+144284/114367056] 
[ide_timer_expiry+172/436] 
[lockd:nlm4_granted_Rea24c726+126932/114384408]  
[lockd:nlm4_granted_Rea24c726+120004/114391336] 
[lockd:nlm4_granted_Rea24c726+127808/114383532] 
[lockd:nlm4_granted_Rea24c726+120004/114391336] 
[getrusage+263/924] 
[lockd:nlm4_granted_Rea24c726+142028/114369312] 
[lockd:nlm4_granted_Rea24c726+87236/114424104] 
[lockd:nlm4_granted_Rea24c726+120076/114391264] 
[do_signal+512/616]  
Code: ac ae 75 08 84 c0 75 f8 31 c0 eb 04 19 c0 0c 01 85 c0 75 d9