diff --git a/frameworks/native/inputmethod_ability/include/input_method_panel.h b/frameworks/native/inputmethod_ability/include/input_method_panel.h
index 093df774796b305ede00343724632411c00c5031..2b56076b24af9edb2b5c135a76580fe62e388649 100644
--- a/frameworks/native/inputmethod_ability/include/input_method_panel.h
+++ b/frameworks/native/inputmethod_ability/include/input_method_panel.h
@@ -128,6 +128,7 @@ private:
     int32_t CalculateFloatRect(const LayoutParams &layoutParams, PanelAdjustInfo &lanIterValue,
         PanelAdjustInfo &porIterValue);
     int32_t CalculateNoConfigRect(const PanelFlag panelFlag, const LayoutParams &layoutParams);
+    void CalculateFloatNoConfigRect(const LayoutParams &layoutParams);
     int32_t GetResizeParams(Rosen::Rect &portrait, Rosen::Rect &landscape, uint32_t width, uint32_t height);
 
     int32_t ParseEnhancedParams(
diff --git a/frameworks/native/inputmethod_ability/src/input_method_panel.cpp b/frameworks/native/inputmethod_ability/src/input_method_panel.cpp
index 0bf9e8c454daef9158c92f616badf2fe3a509a66..55cd59e4a2ab9d1abece36a40f6bad253829256c 100644
--- a/frameworks/native/inputmethod_ability/src/input_method_panel.cpp
+++ b/frameworks/native/inputmethod_ability/src/input_method_panel.cpp
@@ -1044,6 +1044,8 @@ int32_t InputMethodPanel::InitAdjustInfo()
             .right = static_cast<int32_t>(config.right * densityDpi),
             .bottom = static_cast<int32_t>(config.bottom * densityDpi) };
         panelAdjust_.insert({ config.style, info });
+        IMSA_HILOGI("PanelAdjustInfo: {top=%{public}d, left=%{public}d, right=%{public}d, bottom=%{public}d}",
+            info.top, info.left, info.right, info.bottom);
     }
     isAdjustInfoInitialized_.store(true);
     return ErrorCode::NO_ERROR;
@@ -1080,46 +1082,62 @@ int32_t InputMethodPanel::CalculateNoConfigRect(const PanelFlag panelFlag, const
     if (panelFlag == PanelFlag::FLG_FIXED) {
         keyboardLayoutParams_.gravity_ = WindowGravity::WINDOW_GRAVITY_BOTTOM;
         WindowSize portraitDisplaySize;
-        if (!GetDisplaySize(true, portraitDisplaySize)) {
-            IMSA_HILOGE("GetPortraitDisplaySize failed!");
+        if (!GetDisplaySize(true, portraitDisplaySize) ||
+            portraitDisplaySize.width > static_cast<uint32_t>(INT32_MAX)) {
+            IMSA_HILOGE("Portrait display width is %{public}u out of int32_t range", portraitDisplaySize.width);
             return ErrorCode::ERROR_WINDOW_MANAGER;
         }
         keyboardLayoutParams_.PortraitPanelRect_.width_ = portraitDisplaySize.width;
         keyboardLayoutParams_.PortraitPanelRect_.height_ = layoutParams.portraitRect.height_;
-        keyboardLayoutParams_.PortraitPanelRect_.posY_ =
-            static_cast<int32_t>(portraitDisplaySize.height - keyboardLayoutParams_.PortraitPanelRect_.height_);
+        int64_t height = static_cast<int64_t>(portraitDisplaySize.height);
+        int64_t panelHeight = static_cast<int64_t>(keyboardLayoutParams_.PortraitPanelRect_.height_);
+        int64_t posY = height - panelHeight;
+        if (posY > INT32_MAX || posY < INT32_MIN) {
+            IMSA_HILOGE("Portrait height:%{public}u, posY:%{public}lld", portraitDisplaySize.height, posY);
+            return ErrorCode::ERROR_PARAMETER_CHECK_FAILED;
+        }
+        keyboardLayoutParams_.PortraitPanelRect_.posY_ = static_cast<int32_t>(posY);
         keyboardLayoutParams_.PortraitPanelRect_.posX_ = NUMBER_ZERO;
-        // fixed Portraitkeyboard
         keyboardLayoutParams_.PortraitKeyboardRect_.width_ = keyboardLayoutParams_.PortraitPanelRect_.width_;
         keyboardLayoutParams_.PortraitKeyboardRect_.height_ = keyboardLayoutParams_.PortraitPanelRect_.height_;
         keyboardLayoutParams_.PortraitKeyboardRect_.posY_ = keyboardLayoutParams_.PortraitPanelRect_.posY_;
         keyboardLayoutParams_.PortraitKeyboardRect_.posX_ = keyboardLayoutParams_.PortraitPanelRect_.posX_;
-
         WindowSize landscapeDisplaySize;
-        if (!GetDisplaySize(false, landscapeDisplaySize)) {
-            IMSA_HILOGE("GetLandscapeDisplaySize failed!");
+        if (!GetDisplaySize(false, landscapeDisplaySize) ||
+            landscapeDisplaySize.width > static_cast<uint32_t>(INT32_MAX)) {
+            IMSA_HILOGE("Landscape display width is %{public}u out of int32_t range!", landscapeDisplaySize.width);
             return ErrorCode::ERROR_WINDOW_MANAGER;
         }
         keyboardLayoutParams_.LandscapePanelRect_.width_ = landscapeDisplaySize.width;
         keyboardLayoutParams_.LandscapePanelRect_.height_ = layoutParams.landscapeRect.height_;
-        keyboardLayoutParams_.LandscapePanelRect_.posY_ =
-            static_cast<int32_t>(landscapeDisplaySize.height - keyboardLayoutParams_.LandscapePanelRect_.height_);
+        int64_t landscapeHeight = static_cast<int64_t>(landscapeDisplaySize.height);
+        int64_t landscapePanelHeight = static_cast<int64_t>(keyboardLayoutParams_.LandscapePanelRect_.height_);
+        int64_t posYLandscape = landscapeHeight - landscapePanelHeight;
+        if (posYLandscape > INT32_MAX || posYLandscape < INT32_MIN) {
+            IMSA_HILOGE("Landscape height:%{public}u, posY:%{public}lld", landscapeDisplaySize.height, posYLandscape);
+            return ErrorCode::ERROR_PARAMETER_CHECK_FAILED;
+        }
+        keyboardLayoutParams_.LandscapePanelRect_.posY_ = static_cast<int32_t>(posYLandscape);
         keyboardLayoutParams_.LandscapePanelRect_.posX_ = NUMBER_ZERO;
-        // Landscapekeyboard
         keyboardLayoutParams_.LandscapeKeyboardRect_.width_ = keyboardLayoutParams_.LandscapePanelRect_.width_;
         keyboardLayoutParams_.LandscapeKeyboardRect_.height_ = keyboardLayoutParams_.LandscapePanelRect_.height_;
         keyboardLayoutParams_.LandscapeKeyboardRect_.posY_ = keyboardLayoutParams_.LandscapePanelRect_.posY_;
         keyboardLayoutParams_.LandscapeKeyboardRect_.posX_ = keyboardLayoutParams_.LandscapePanelRect_.posX_;
     } else {
-        keyboardLayoutParams_.gravity_ = WindowGravity::WINDOW_GRAVITY_FLOAT;
-        keyboardLayoutParams_.LandscapeKeyboardRect_ = layoutParams.landscapeRect;
-        keyboardLayoutParams_.PortraitKeyboardRect_ = layoutParams.portraitRect;
-        keyboardLayoutParams_.LandscapePanelRect_ = layoutParams.landscapeRect;
-        keyboardLayoutParams_.PortraitPanelRect_ = layoutParams.portraitRect;
+        CalculateFloatNoConfigRect(layoutParams);
     }
     return ErrorCode::NO_ERROR;
 }
 
+void InputMethodPanel::CalculateFloatNoConfigRect(const LayoutParams &layoutParams)
+{
+    keyboardLayoutParams_.gravity_ = WindowGravity::WINDOW_GRAVITY_FLOAT;
+    keyboardLayoutParams_.LandscapeKeyboardRect_ = layoutParams.landscapeRect;
+    keyboardLayoutParams_.PortraitKeyboardRect_ = layoutParams.portraitRect;
+    keyboardLayoutParams_.LandscapePanelRect_ = layoutParams.landscapeRect;
+    keyboardLayoutParams_.PortraitPanelRect_ = layoutParams.portraitRect;
+}
+
 std::tuple<std::vector<std::string>, std::vector<std::string>> InputMethodPanel::GetScreenStatus(
     const PanelFlag panelFlag)
 {