page_fault: wrong gs 0 expected ffffffff805fb4c0
Unable to handle kernel NULL pointer dereference at virtual address 000000000000
0008
 printing rip:
ffffffff80110053
PML4 17becb067 PGD 17bec5067 PMD 0 
Oops: 0002
CPU 0 
Pid: 2218, comm: insmod Not tainted
RIP: 0010:[<ffffffff80110053>]{system_call+3}
RSP: 0018:000001017becde30  EFLAGS: 00010012
RAX: 000000000000005f RBX: ffffffff8040ed20 RCX: ffffffffa00810fa
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000001b6
RBP: ffffffffa0081000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000212 R12: 0000000000554030
R13: 00000000000000b8 R14: 000000000000000c R15: 000001017c504740
FS:  0000002a9557d4c0(0000) GS:ffffffff805fb4c0(0000) knlGS:ffffffff805fb4c0
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000008 CR3: 0000000000101000 CR4: 00000000000006e0

Call Trace: [<ffffffffa008113c>]{:syscall_test:syscall_test_init+28} 
       [<ffffffff801256b6>]{sys_init_module+1686} [<ffffffffa00810b8>] 
       [<ffffffff801100c7>]{system_call+119} 
Process insmod (pid: 2218, stackpage=1017becd000)
Stack: 000001017becde30 0000000000000018 ffffffffa008113c 0000000000554030 
       ffffffff801256b6 000001017be78000 000001017e893680 000001017e893640 
       00000000005542c6 000001017be78000 000001017be7a000 ffffff00000e5000 
       0000000000000246 00000000000000b8 ffffffffa007c000 ffffffffa00810b8 
       00000000000006a8 0000000000000000 0000000000000000 0000000000000000 
       0000000000000000 0000000000000000 0000000000000000 0000000000000000 
       0000000000000000 0000000000000000 0000000000000000 0000000000000000 
       0000000000000000 0000000000000000 0000000000000000 0000000000000000 
       0000000000000000 0000000000000000 0000000000000000 0000000000000000 
       0000002a958aa6c0 0000000000000000 00000000005539d0 00000000005514e0 
Call Trace: [<ffffffffa008113c>]{:syscall_test:syscall_test_init+28} 
       [<ffffffff801256b6>]{sys_init_module+1686} [<ffffffffa00810b8>] 
       [<ffffffff801100c7>]{system_call+119} 

Code: 65 48 89 24 25 08 00 00 00 65 48 8b 24 25 00 00 00 00 fb 48

Kernel panic: Fatal exception
=================================

syscall_test_init() dump:

0x0000000000000060 <syscall_test_init+0>:       sub    $0x8,%rsp
0x0000000000000064 <syscall_test_init+4>:       mov    $0x0,%rdi
0x000000000000006b <syscall_test_init+11>:      xor    %eax,%eax
0x000000000000006d <syscall_test_init+13>:      callq  0x72 <syscall_test_init+18>
0x0000000000000072 <syscall_test_init+18>:      mov    $0x1b6,%edi
0x0000000000000077 <syscall_test_init+23>:      callq  0x30 <umask>
0x000000000000007c <syscall_test_init+28>:      mov    $0x0,%rdi
0x0000000000000083 <syscall_test_init+35>:      mov    %rax,%rsi
0x0000000000000086 <syscall_test_init+38>:      xor    %eax,%eax
0x0000000000000088 <syscall_test_init+40>:      callq  0x8d <syscall_test_init+45>
0x000000000000008d <syscall_test_init+45>:      mov    $0x0,%rdi
0x0000000000000094 <syscall_test_init+52>:      xor    %eax,%eax
0x0000000000000096 <syscall_test_init+54>:    callq  0x9b <syscall_test_init+59>
0x000000000000009b <syscall_test_init+59>:      mov    $0x1b6,%edi
0x00000000000000a0 <syscall_test_init+64>:      callq  0x0 <wrapper_umask>
0x00000000000000a5 <syscall_test_init+69>:      mov    $0x0,%rdi
0x00000000000000ac <syscall_test_init+76>:      mov    %rax,%rsi
0x00000000000000af <syscall_test_init+79>:      xor    %eax,%eax
0x00000000000000b1 <syscall_test_init+81>:      callq  0xb6 <syscall_test_init+86>
0x00000000000000b6 <syscall_test_init+86>:      xor    %eax,%eax
0x00000000000000b8 <syscall_test_init+88>:      add    $0x8,%rsp
0x00000000000000bc <syscall_test_init+92>:      retq
0x00000000000000bd <syscall_test_init+93>:      data16
0x00000000000000be <syscall_test_init+94>:      data16
0x00000000000000bf <syscall_test_init+95>:      nop