From: Wei Yang <richardw.yang@linux.intel.com>
Date: Mon, 1 Apr 2019 02:17:23 +0000 (-0700)
Subject: kvm: x86: offset is ensure to be in range
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4cb8b1163586addc9e1f4eebe232a11534c24d4a;p=linux.git

kvm: x86: offset is ensure to be in range

In function apic_mmio_write(), the offset has been checked in:

   * apic_mmio_in_range()
   * offset & 0xf

These two ensures offset is in range [0x010, 0xff0].

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 9a54fccd0aa25..e82a18ccfc1a2 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2023,7 +2023,7 @@ static int apic_mmio_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this,
 		apic_debug("%s: offset 0x%x with length 0x%x, and value is "
 			   "0x%x\n", __func__, offset, len, val);
 
-	kvm_lapic_reg_write(apic, offset & 0xff0, val);
+	kvm_lapic_reg_write(apic, offset, val);
 
 	return 0;
 }