BSOD sgdt

[baby0o01999]

BSOD code

sgdt [rcx]

windbg----------------------------------------------------
PROCESS_NAME: Notepad2.exe

TRAP_FRAME: ffff9f040f207c70 -- (.trap 0xffff9f040f207c70)
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=0000000000000033 rbx=0000000000000000 rcx=0000000000000006
rdx=0000000000000001 rsi=0000000000000000 rdi=0000000000000000
rip=fffff80123823ccb rsp=ffff9f040f207e00 rbp=0000000000000000
r8=ffff9f040f207fe0 r9=0000000000000802 r10=0000000000000000
r11=ffff78fb67e00000 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0 nv up di pl nz na pe nc
DdiMon+0x3ccb:
fffff80123823ccb 66891f mov word ptr [rdi],bx ds:0000000000000000=????
Resetting default scope

BAD_STACK_POINTER: ffff9f040f207b28

STACK_TEXT:
ffff9f040f207b28 fffff801189ce569 : 000000000000000a 000001e21abb0000 00000000000000ff 0000000000000000 : nt!KeBugCheckEx
ffff9f040f207b30 fffff801189ca8a5 : 0000000000000000 0000000000000000 0000000000000000 0000000000000000 : nt!KiBugCheckDispatch+0x69
ffff9f040f207c70 fffff80123823ccb : 0000000000000000 0000000000000033 ffff9f040f207eb0 ffff9f0407361000 : nt!KiPageFault+0x465
ffff9f040f207e00 0000000000000000 : 0000000000000033 ffff9f040f207eb0 ffff9f0407361000 0000000242e89222 : DdiMon+0x3ccb

SYMBOL_NAME: DdiMon+3ccb

MODULE_NAME: DdiMon

IDA pro DdiMon+3ccb
v21 = UtilVmRead(kGuestGdtrBase);
v22 = UtilVmRead(kGuestGdtrLimit);
v23 = (*(_QWORD *)(v21 + 8 * ((unsigned __int64)(unsigned __int16)UtilVmRead(kGuestCsSelector) >> 3)) >> 53) & 1i64;
*(_WORD *)v11 = v22; // BSOD
if ( v23 )
*(_QWORD *)(v11 + 2) = v21;
else
*(_DWORD *)(v11 + 2) = v21;
goto LABEL_44;

vmm.cpp
// 64bit
descriptor_table_reg->base = gdt_base; //BSOD
descriptor_table_reg->limit = gdt_limit;