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ntoskrnl: Use SIZE_T to store 64-bit offset to USER_SHARED_DATA page.

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Sebastian Lackner 2015-06-24 01:54:40 +02:00 committed by Alexandre Julliard
parent ed06707bac
commit 3d203b1ecb
1 changed files with 3 additions and 3 deletions
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6
dlls/ntoskrnl.exe/instr.c
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@ -684,7 +684,7 @@ static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
BYTE *data = INSTR_GetOperandAddr( context, instr + 2, long_addr,
rex, segprefix, &len );
unsigned int data_size = (instr[1] == 0xb7) ? 2 : 1;
unsigned int offset = data - user_shared_data;
SIZE_T offset = data - user_shared_data;
if (offset <= sizeof(KSHARED_USER_DATA) - data_size)
{
@ -705,7 +705,7 @@ static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
BYTE *data = INSTR_GetOperandAddr( context, instr + 1, long_addr,
rex, segprefix, &len );
unsigned int data_size = (*instr == 0x8b) ? get_op_size( long_op, rex ) : 1;
unsigned int offset = data - user_shared_data;
SIZE_T offset = data - user_shared_data;
if (offset <= sizeof(KSHARED_USER_DATA) - data_size)
{
@ -725,7 +725,7 @@ static DWORD emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context )
{
BYTE *data = (BYTE *)(long_addr ? *(DWORD64 *)(instr + 1) : *(DWORD *)(instr + 1));
unsigned int data_size = (*instr == 0xa1) ? get_op_size( long_op, rex ) : 1;
unsigned int offset = data - user_shared_data;
SIZE_T offset = data - user_shared_data;
len = long_addr ? sizeof(DWORD64) : sizeof(DWORD);
if (offset <= sizeof(KSHARED_USER_DATA) - data_size)