KVM: Fix compound mmio

mmio_index should be taken into account when copying data from userspace. Signed-off-by: Gleb Natapov <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
jadonk · May 22, 2011 · 0004c7c · 0004c7c
1 parent 4947e7c
commit 0004c7c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
@@ -5576,7 +5576,8 @@ static int complete_mmio(struct kvm_vcpu *vcpu)
 	if (vcpu->mmio_needed) {
 		vcpu->mmio_needed = 0;
 		if (!vcpu->mmio_is_write)
-			memcpy(vcpu->mmio_data, run->mmio.data, 8);
+			memcpy(vcpu->mmio_data + vcpu->mmio_index,
+			       run->mmio.data, 8);
 		vcpu->mmio_index += 8;
 		if (vcpu->mmio_index < vcpu->mmio_size) {
 			run->exit_reason = KVM_EXIT_MMIO;