diff --git a/dm/src/display_manager_adapter.cpp b/dm/src/display_manager_adapter.cpp
index 5e2ae403..853c5bb5 100644
--- a/dm/src/display_manager_adapter.cpp
+++ b/dm/src/display_manager_adapter.cpp
@@ -232,8 +232,8 @@ bool BaseAdapter::InitDMSProxy()
             return false;
         }
 
-        dmsDeath_ = new DMSDeathRecipient(*this);
-        if (!dmsDeath_) {
+        dmsDeath_ = new(std::nothrow) DMSDeathRecipient(*this);
+        if (dmsDeath_ == nullptr) {
             WLOGFE("Failed to create death Recipient ptr DMSDeathRecipient");
             return false;
         }
diff --git a/dmserver/src/abstract_display_controller.cpp b/dmserver/src/abstract_display_controller.cpp
index e584dad7..981dd547 100644
--- a/dmserver/src/abstract_display_controller.cpp
+++ b/dmserver/src/abstract_display_controller.cpp
@@ -44,7 +44,11 @@ void AbstractDisplayController::Init(sptr<AbstractScreenController> abstractScre
     WLOGFD("display controller init");
     displayCount_ = 0;
     abstractScreenController_ = abstractScreenController;
-    abstractScreenCallback_ = new AbstractScreenController::AbstractScreenCallback();
+    abstractScreenCallback_ = new(std::nothrow) AbstractScreenController::AbstractScreenCallback();
+    if (abstractScreenCallback_ == nullptr) {
+        WLOGFE("abstractScreenCallback init failed");
+        return;
+    }
     abstractScreenCallback_->onConnect_
         = std::bind(&AbstractDisplayController::OnAbstractScreenConnect, this, std::placeholders::_1);
     abstractScreenCallback_->onDisconnect_
diff --git a/utils/src/display_info.cpp b/utils/src/display_info.cpp
index 7044eea6..1eed4ce8 100644
--- a/utils/src/display_info.cpp
+++ b/utils/src/display_info.cpp
@@ -28,7 +28,10 @@ bool DisplayInfo::Marshalling(Parcel &parcel) const
 
 DisplayInfo *DisplayInfo::Unmarshalling(Parcel &parcel)
 {
-    DisplayInfo *displayInfo = new DisplayInfo();
+    DisplayInfo *displayInfo = new(std::nothrow) DisplayInfo();
+    if (displayInfo == nullptr) {
+        return nullptr;
+    }
     uint32_t type = (uint32_t)DisplayType::DEFAULT;
     uint32_t rotation;
     uint32_t orientation;
diff --git a/wmserver/src/window_manager_service.cpp b/wmserver/src/window_manager_service.cpp
index 068c1c31..b176df9b 100644
--- a/wmserver/src/window_manager_service.cpp
+++ b/wmserver/src/window_manager_service.cpp
@@ -65,7 +65,7 @@ void WindowManagerService::OnStart()
 
 void WindowManagerService::RegisterSnapshotHandler()
 {
-    if (!snapshotController_) {
+    if (snapshotController_ == nullptr) {
         snapshotController_ = new SnapshotController(windowRoot_);
     }
     if (AAFwk::AbilityManagerClient::GetInstance()->RegisterSnapshotHandler(snapshotController_) != ERR_OK) {