diff --git a/vmm/src/device_manager.rs b/vmm/src/device_manager.rs
index 93999e1be..4ee580de6 100644
--- a/vmm/src/device_manager.rs
+++ b/vmm/src/device_manager.rs
@@ -4147,14 +4147,19 @@ impl Pausable for DeviceManager {
                     .get_gic_device()
                     .unwrap(),
             );
-            gic_device
+            if let Some(gicv3_its) = gic_device
                 .lock()
                 .unwrap()
                 .as_any_concrete_mut()
                 .downcast_mut::<KvmGicV3Its>()
-                .unwrap()
-                .pause()?;
-        }
+            {
+                gicv3_its.pause()?;
+            } else {
+                return Err(MigratableError::Pause(anyhow!(
+                    "GicDevice downcast to KvmGicV3Its failed when pausing device manager!"
+                )));
+            };
+        };
 
         Ok(())
     }
diff --git a/vmm/src/vm.rs b/vmm/src/vm.rs
index e7b963eab..b6c1216a3 100644
--- a/vmm/src/vm.rs
+++ b/vmm/src/vm.rs
@@ -2027,13 +2027,18 @@ impl Vm {
             .set_gicr_typers(&saved_vcpu_states);
 
         vm_snapshot.add_snapshot(
-            gic_device
+            if let Some(gicv3_its) = gic_device
                 .lock()
                 .unwrap()
                 .as_any_concrete_mut()
                 .downcast_mut::<KvmGicV3Its>()
-                .unwrap()
-                .snapshot()?,
+            {
+                gicv3_its.snapshot()?
+            } else {
+                return Err(MigratableError::Snapshot(anyhow!(
+                    "GicDevice downcast to KvmGicV3Its failed when snapshotting VM!"
+                )));
+            },
         );
 
         Ok(())
@@ -2071,13 +2076,18 @@ impl Vm {
 
         // Restore GIC states.
         if let Some(gicv3_its_snapshot) = vm_snapshot.snapshots.get(GIC_V3_ITS_SNAPSHOT_ID) {
-            gic_device
+            if let Some(gicv3_its) = gic_device
                 .lock()
                 .unwrap()
                 .as_any_concrete_mut()
                 .downcast_mut::<KvmGicV3Its>()
-                .unwrap()
-                .restore(*gicv3_its_snapshot.clone())?;
+            {
+                gicv3_its.restore(*gicv3_its_snapshot.clone())?;
+            } else {
+                return Err(MigratableError::Restore(anyhow!(
+                    "GicDevice downcast to KvmGicV3Its failed when restoring VM!"
+                )));
+            };
         } else {
             return Err(MigratableError::Restore(anyhow!(
                 "Missing GicV3Its snapshot"