fix disk list corruption issue

staging/src/k8s.io/legacy-cloud-providers/azure/azure_controller_standard.go

@@ -41,7 +41,9 @@ func (as *availabilitySet) AttachDisk(isManagedDisk bool, diskName, diskURI stri
 		return err
 	}
 
-	disks := *vm.StorageProfile.DataDisks
+	disks := make([]compute.DataDisk, len(*vm.StorageProfile.DataDisks))
+	copy(disks, *vm.StorageProfile.DataDisks)
+
 	if isManagedDisk {
 		disks = append(disks,
 			compute.DataDisk{
@@ -113,7 +115,9 @@ func (as *availabilitySet) DetachDisk(diskName, diskURI string, nodeName types.N
 		return nil, err
 	}
 
-	disks := *vm.StorageProfile.DataDisks
+	disks := make([]compute.DataDisk, len(*vm.StorageProfile.DataDisks))
+	copy(disks, *vm.StorageProfile.DataDisks)
+
 	bFoundDisk := false
 	for i, disk := range disks {
 		if disk.Lun != nil && (disk.Name != nil && diskName != "" && *disk.Name == diskName) ||

staging/src/k8s.io/legacy-cloud-providers/azure/azure_controller_vmss.go

@@ -43,7 +43,8 @@ func (ss *scaleSet) AttachDisk(isManagedDisk bool, diskName, diskURI string, nod
 
 	disks := []compute.DataDisk{}
 	if vm.StorageProfile != nil && vm.StorageProfile.DataDisks != nil {
-		disks = *vm.StorageProfile.DataDisks
+		disks = make([]compute.DataDisk, len(*vm.StorageProfile.DataDisks))
+		copy(disks, *vm.StorageProfile.DataDisks)
 	}
 	if isManagedDisk {
 		disks = append(disks,
@@ -118,7 +119,8 @@ func (ss *scaleSet) DetachDisk(diskName, diskURI string, nodeName types.NodeName
 
 	disks := []compute.DataDisk{}
 	if vm.StorageProfile != nil && vm.StorageProfile.DataDisks != nil {
-		disks = *vm.StorageProfile.DataDisks
+		disks = make([]compute.DataDisk, len(*vm.StorageProfile.DataDisks))
+		copy(disks, *vm.StorageProfile.DataDisks)
 	}
 	bFoundDisk := false
 	for i, disk := range disks {