diff --git a/frameworks/native/inputmethod_controller/src/input_method_controller.cpp b/frameworks/native/inputmethod_controller/src/input_method_controller.cpp
index f7d5e5362517aaedc7cf73f8e4e1851c6c097db4..a4550492dd61a058a98f544582285ae6887ae767 100644
--- a/frameworks/native/inputmethod_controller/src/input_method_controller.cpp
+++ b/frameworks/native/inputmethod_controller/src/input_method_controller.cpp
@@ -1538,6 +1538,9 @@ std::shared_ptr<IInputMethodAgent> InputMethodController::GetAgent()
 void InputMethodController::PrintLogIfAceTimeout(int64_t start)
 {
     int64_t end = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
+    if (end < start || start < 0) {
+        return;
+    }
     if (end - start > ACE_DEAL_TIME_OUT) {
         IMSA_HILOGW("timeout: [%{public}" PRId64 ", %{public}" PRId64 "].", start, end);
     }
diff --git a/services/src/full_ime_info_manager.cpp b/services/src/full_ime_info_manager.cpp
index bd00b0ed135277ce35b07bf56c1c61f11b87e84c..eb2d26ee306f2ba8a1438f3297f23128fcf59194 100644
--- a/services/src/full_ime_info_manager.cpp
+++ b/services/src/full_ime_info_manager.cpp
@@ -40,9 +40,16 @@ FullImeInfoManager::FullImeInfoManager()
     timerId_ = timer_.Register(
         []() {
             Message *msg = new (std::nothrow) Message(MessageID::MSG_ID_REGULAR_UPDATE_IME_INFO, nullptr);
-            if (msg != nullptr) {
-                MessageHandler::Instance()->SendMessage(msg);
+            if (msg == nullptr) {
+                IMSA_HILOGE("failed to create message!");
+                return;
             }
+            auto instance = MessageHandler::Instance();
+            if (instance == nullptr) {
+                delete msg;
+                return;
+            }
+            instance->SendMessage(msg);
         },
         TIMER_TASK_INTERNAL, false);
 }
diff --git a/services/src/input_method_system_ability.cpp b/services/src/input_method_system_ability.cpp
index caac6c8c682e036820073c5eb6ef8a8b56511e5e..71791e9f48b7620fb0e4008426ea9fd25a7a703d 100644
--- a/services/src/input_method_system_ability.cpp
+++ b/services/src/input_method_system_ability.cpp
@@ -86,9 +86,14 @@ InputMethodSystemAbility::~InputMethodSystemAbility()
 {
     stop_ = true;
     Message *msg = new (std::nothrow) Message(MessageID::MSG_ID_QUIT_WORKER_THREAD, nullptr);
+    if (msg == nullptr) {
+        IMSA_HILOGE("new Message failed");
+        return;
+    }
     auto handler = MessageHandler::Instance();
     if (handler == nullptr) {
         IMSA_HILOGE("handler is nullptr");
+        delete msg;
         return;
     }
     handler->SendMessage(msg);