diff --git a/frameworks/js/napi/file_access_ext_ability/file_access_ext_ability_module.cpp b/frameworks/js/napi/file_access_ext_ability/file_access_ext_ability_module.cpp
index 99ea071f..6d8e948f 100644
--- a/frameworks/js/napi/file_access_ext_ability/file_access_ext_ability_module.cpp
+++ b/frameworks/js/napi/file_access_ext_ability/file_access_ext_ability_module.cpp
@@ -29,7 +29,9 @@ void NAPI_application_FileAccessExtensionAbility_AutoRegister()
         .name = "application.FileAccessExtensionAbility",
         .fileName = "application/libfileaccessextensionability_napi.so/FileAccessExtensionAbility.js",
     };
-    moduleManager->Register(&newModuleInfo);
+    if (moduleManager != nullptr) {
+        moduleManager->Register(&newModuleInfo);
+    }
 }
 
 extern "C" __attribute__((visibility("default")))
diff --git a/frameworks/js/napi/file_access_module/napi_fileaccess_helper.cpp b/frameworks/js/napi/file_access_module/napi_fileaccess_helper.cpp
index 0ba439e7..c5c6b940 100644
--- a/frameworks/js/napi/file_access_module/napi_fileaccess_helper.cpp
+++ b/frameworks/js/napi/file_access_module/napi_fileaccess_helper.cpp
@@ -1302,6 +1302,10 @@ napi_value NAPI_UnregisterObserver(napi_env env, napi_callback_info info)
         }
 
         auto wrapper = observerWrapper.release();
+        if (wrapper == nullptr) {
+            HILOG_ERROR("wrapper is nullptr");
+            return nullptr;
+        }
         retCode = fileAccessHelper->UnregisterNotify(uri, wrapper->callback);
     }
 
diff --git a/frameworks/js/napi/file_access_module/napi_observer_callback.cpp b/frameworks/js/napi/file_access_module/napi_observer_callback.cpp
index facc7f2a..682ab9c4 100644
--- a/frameworks/js/napi/file_access_module/napi_observer_callback.cpp
+++ b/frameworks/js/napi/file_access_module/napi_observer_callback.cpp
@@ -74,11 +74,19 @@ static napi_status SetValueArray(const napi_env& env,
 void NapiObserver::NapiWorkScope(uv_work_t *work, int status)
 {
     if (work == nullptr) {
-        HILOG_ERROR("Work is null");
+        HILOG_ERROR("Work is nullptr");
         return;
     }
     std::unique_ptr<CallbackParam> param(reinterpret_cast<CallbackParam *>(work->data));
     napi_handle_scope scope = nullptr;
+    if (param == nullptr) {
+        HILOG_ERROR("Param is nullptr");
+        return;
+    }
+    if (param->napiObserver == nullptr) {
+        HILOG_ERROR("param->napiObserver is nullptr");
+        return;
+    }
     napi_open_handle_scope(param->napiObserver->env_, &scope);
     if (scope == nullptr) {
         HILOG_ERROR("napi_open_handle_scope failed");
diff --git a/frameworks/js/napi/file_access_module/native_fileaccess_module.cpp b/frameworks/js/napi/file_access_module/native_fileaccess_module.cpp
index bfc3fc80..38a21ff0 100644
--- a/frameworks/js/napi/file_access_module/native_fileaccess_module.cpp
+++ b/frameworks/js/napi/file_access_module/native_fileaccess_module.cpp
@@ -54,6 +54,10 @@ static napi_value Init(napi_env env, napi_value exports)
     products.emplace_back(std::make_unique<NapiFileIteratorExporter>(env, exports));
     products.emplace_back(std::make_unique<NapiFileInfoExporter>(env, exports));
     for (auto &&product : products) {
+        if (product == nullptr) {
+            HILOG_ERROR("INNER BUG. product is nullptr");
+            return nullptr;
+        }
         if (!product->Export()) {
             HILOG_ERROR("INNER BUG. Failed to export class %{public}s", product->GetClassName().c_str());
             return nullptr;
diff --git a/frameworks/js/napi/file_access_module/root_info/napi_root_info_exporter.cpp b/frameworks/js/napi/file_access_module/root_info/napi_root_info_exporter.cpp
index ef7b9603..3a22fb02 100644
--- a/frameworks/js/napi/file_access_module/root_info/napi_root_info_exporter.cpp
+++ b/frameworks/js/napi/file_access_module/root_info/napi_root_info_exporter.cpp
@@ -98,6 +98,10 @@ static int TransferListFile(const RootInfoEntity* rootEntity, FileIteratorEntity
     fileIteratorEntity->offset = 0;
     fileIteratorEntity->filter = std::move(filter);
     fileIteratorEntity->flag = CALL_LISTFILE;
+    if (rootEntity->fileAccessHelper == nullptr) {
+        HILOG_ERROR("rootEntity->fileAccessHelper is nullptr");
+        return E_GETRESULT;
+    }
     return rootEntity->fileAccessHelper->ListFile(fileInfo, fileIteratorEntity->offset, filter,
         fileIteratorEntity->memInfo);
 }
diff --git a/interfaces/inner_api/file_access/src/file_access_ext_proxy.cpp b/interfaces/inner_api/file_access/src/file_access_ext_proxy.cpp
index 3c0b1c48..c130c52a 100644
--- a/interfaces/inner_api/file_access/src/file_access_ext_proxy.cpp
+++ b/interfaces/inner_api/file_access/src/file_access_ext_proxy.cpp
@@ -34,6 +34,10 @@ int FileAccessExtProxy::OpenFile(const Uri &uri, const int flags, int &fd)
 {
     UserAccessTracer trace;
     trace.Start("OpenFile");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -82,6 +86,10 @@ int FileAccessExtProxy::CreateFile(const Uri &parent, const std::string &display
 {
     UserAccessTracer trace;
     trace.Start("CreateFile");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -136,6 +144,10 @@ int FileAccessExtProxy::Mkdir(const Uri &parent, const std::string &displayName,
 {
     UserAccessTracer trace;
     trace.Start("Mkdir");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -190,6 +202,10 @@ int FileAccessExtProxy::Delete(const Uri &sourceFile)
 {
     UserAccessTracer trace;
     trace.Start("Delete");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -227,6 +243,10 @@ int FileAccessExtProxy::Move(const Uri &sourceFile, const Uri &targetParent, Uri
 {
     UserAccessTracer trace;
     trace.Start("Move");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -359,6 +379,10 @@ int FileAccessExtProxy::Copy(const Uri &sourceUri, const Uri &destUri, std::vect
 {
     UserAccessTracer trace;
     trace.Start("Copy");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -392,6 +416,10 @@ int FileAccessExtProxy::CopyFile(const Uri &sourceUri, const Uri &destUri, const
 {
     UserAccessTracer trace;
     trace.Start("CopyFile");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -437,6 +465,10 @@ int FileAccessExtProxy::Rename(const Uri &sourceFile, const std::string &display
 {
     UserAccessTracer trace;
     trace.Start("Rename");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -577,6 +609,10 @@ int FileAccessExtProxy::ListFile(const FileInfo &fileInfo, const int64_t offset,
 {
     UserAccessTracer trace;
     trace.Start("ListFile");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -618,6 +654,10 @@ int FileAccessExtProxy::ScanFile(const FileInfo &fileInfo, const int64_t offset,
 {
     UserAccessTracer trace;
     trace.Start("ScanFile");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -691,6 +731,10 @@ int FileAccessExtProxy::Query(const Uri &uri, std::vector<std::string> &columns,
 {
     UserAccessTracer trace;
     trace.Start("Query");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -738,6 +782,10 @@ int FileAccessExtProxy::GetRoots(std::vector<RootInfo> &rootInfoVec)
 {
     UserAccessTracer trace;
     trace.Start("GetRoots");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -784,6 +832,10 @@ int FileAccessExtProxy::GetFileInfoFromUri(const Uri &selectFile, FileInfo &file
 {
     UserAccessTracer trace;
     trace.Start("GetFileInfoFromUri");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -828,6 +880,10 @@ int FileAccessExtProxy::GetFileInfoFromRelativePath(const std::string &selectFil
 {
     UserAccessTracer trace;
     trace.Start("GetFileInfoFromRelativePath");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -872,6 +928,10 @@ int FileAccessExtProxy::Access(const Uri &uri, bool &isExist)
 {
     UserAccessTracer trace;
     trace.Start("Access");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -914,6 +974,10 @@ int FileAccessExtProxy::StartWatcher(const Uri &uri)
 {
     UserAccessTracer trace;
     trace.Start("StartWatcher");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -952,6 +1016,10 @@ int FileAccessExtProxy::StopWatcher(const Uri &uri)
 {
     UserAccessTracer trace;
     trace.Start("StopWatcher");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
@@ -1028,6 +1096,10 @@ int FileAccessExtProxy::MoveItem(const Uri &sourceFile, const Uri &targetParent,
 {
     UserAccessTracer trace;
     trace.Start("MoveItem");
+    if (Remote() == nullptr) {
+        HILOG_ERROR("Remote is nullptr");
+        return E_IPCS;
+    }
     MessageParcel data;
     if (!data.WriteInterfaceToken(FileAccessExtProxy::GetDescriptor())) {
         HILOG_ERROR("WriteInterfaceToken failed");
diff --git a/interfaces/inner_api/file_access/src/file_access_helper.cpp b/interfaces/inner_api/file_access/src/file_access_helper.cpp
index e2e58d79..fb143a2f 100644
--- a/interfaces/inner_api/file_access/src/file_access_helper.cpp
+++ b/interfaces/inner_api/file_access/src/file_access_helper.cpp
@@ -362,6 +362,10 @@ bool FileAccessHelper::GetProxy()
 {
     for (auto iter = cMap_.begin(); iter != cMap_.end(); ++iter) {
         auto connectInfo = iter->second;
+        if (connectInfo == nullptr || connectInfo->fileAccessExtConnection == nullptr) {
+            HILOG_ERROR("connectInfo is nullptr");
+            return false;
+        }
         if (!connectInfo->fileAccessExtConnection->IsExtAbilityConnected()) {
             connectInfo->fileAccessExtConnection->ConnectFileExtAbility(connectInfo->want);
         }
@@ -909,6 +913,10 @@ int FileAccessHelper::GetRoots(std::vector<RootInfo> &rootInfoVec)
     int ret = ERR_OK;
     for (auto iter = cMap_.begin(); iter != cMap_.end(); ++iter) {
         auto connectInfo = iter->second;
+        if (connectInfo == nullptr || connectInfo->fileAccessExtConnection == nullptr) {
+            HILOG_ERROR("connectInfo is nullptr");
+            return E_IPCS;
+        }
         auto fileAccessExtProxy = connectInfo->fileAccessExtConnection->GetFileExtProxy();
         std::vector<RootInfo> results;
         if (!fileAccessExtProxy) {
diff --git a/interfaces/inner_api/file_access/src/js_file_access_ext_ability.cpp b/interfaces/inner_api/file_access/src/js_file_access_ext_ability.cpp
index 5bd801d4..59fd196f 100644
--- a/interfaces/inner_api/file_access/src/js_file_access_ext_ability.cpp
+++ b/interfaces/inner_api/file_access/src/js_file_access_ext_ability.cpp
@@ -84,11 +84,13 @@ void JsFileAccessExtAbility::Init(const std::shared_ptr<AbilityLocalRecord> &rec
         HILOG_ERROR("Failed to get srcPath");
         return;
     }
-
+    if (abilityInfo_ == nullptr) {
+        HILOG_ERROR("abilityInfo_ is nullptr");
+        return;
+    }
     std::string moduleName(Extension::abilityInfo_->moduleName);
     moduleName.append("::").append(abilityInfo_->name);
     HandleScope handleScope(jsRuntime_);
-
     jsObj_ = jsRuntime_.LoadModule(moduleName, srcPath, abilityInfo_->hapPath,
         abilityInfo_->compileMode == AbilityRuntime::CompileMode::ES_MODULE);
     if (jsObj_ == nullptr) {
@@ -242,7 +244,7 @@ int JsFileAccessExtAbility::CallJsMethod(const std::string &funcName, JsRuntime
         loop, work.get(), [](uv_work_t *work) {},
         [](uv_work_t *work, int status) {
             CallJsParam *param = reinterpret_cast<CallJsParam *>(work->data);
-            if (param == nullptr) {
+            if (param == nullptr || param->jsRuntime == nullptr) {
                 HILOG_ERROR("failed to get CallJsParam.");
                 return;
             }
@@ -1194,7 +1196,7 @@ void ChangeCurrentDir(RootInfo &rootInfo)
         HILOG_WARN("get userName fail");
         return;
     }
-    HILOG_DEBUG("GetuserName: %{public}s", userName.c_str());
+    HILOG_DEBUG("GetuserName: %{private}s", userName.c_str());
     if (rootInfo.uri.rfind("file://docs/storage/Users/currentUser") == 0) {
         rootInfo.uri = "file://docs/storage/Users/" + userName;
     }
diff --git a/interfaces/kits/native/recent/module.cpp b/interfaces/kits/native/recent/module.cpp
index bc4fb3d7..a2955eab 100644
--- a/interfaces/kits/native/recent/module.cpp
+++ b/interfaces/kits/native/recent/module.cpp
@@ -29,6 +29,10 @@ static napi_value Export(napi_env env, napi_value exports)
     std::vector<unique_ptr<NExporter>> products;
     products.emplace_back(make_unique<RecentNExporter>(env, exports));
     for (auto &&product : products) {
+        if (!product) {
+            HILOG_ERROR("product is nullptr");
+            return nullptr;
+        }
         if (!product->Export()) {
             HILOG_ERROR("INNER BUG. Failed to export class %{public}s for module recent",
                 product->GetClassName().c_str());
diff --git a/interfaces/kits/native/recent/recent_n_exporter.cpp b/interfaces/kits/native/recent/recent_n_exporter.cpp
index 85af5524..7d6f3f65 100644
--- a/interfaces/kits/native/recent/recent_n_exporter.cpp
+++ b/interfaces/kits/native/recent/recent_n_exporter.cpp
@@ -159,7 +159,15 @@ napi_value RecentNExporter::RemoveRecentFile(napi_env env, napi_callback_info cb
 
 static void Deleter(struct NameListArg *arg)
 {
-    for (int i = 0; i < arg->direntNum; i++) {
+    if (arg == nullptr) {
+        HILOG_ERROR("invalid argument arg is nullptr");
+        return;
+    }
+    if (arg->namelist == nullptr) {
+        HILOG_ERROR("arg->namelist is nullptr");
+        return;
+    }
+    for (uint32_t i = 0; i < arg->direntNum; i++) {
         free((arg->namelist)[i]);
         (arg->namelist)[i] = nullptr;
     }
@@ -195,6 +203,10 @@ static int SortReceneFile(const struct dirent **a, const struct dirent **b)
 
 static int FilterFunc(const struct dirent *filename)
 {
+    if (filename == nullptr) {
+        HILOGE("filename is bullptr");
+        return false;
+    }
     if (string_view(filename->d_name) == "." || string_view(filename->d_name) == "..") {
         return false;
     }
@@ -254,7 +266,7 @@ static napi_value GetListFileResult(napi_env env, struct NameListArg* pNameList)
     }
     auto buf = CreateUniquePtr<char[]>(BUF_SIZE);
     int index = 0;
-    for (int i = 0; i < pNameList->direntNum; ++i) {
+    for (uint32_t i = 0; i < pNameList->direntNum; ++i) {
         string recentFilePath = RecentNExporter::recentPath_ + string((*(pNameList->namelist[i])).d_name);
         if (index < MAX_RECENT_SIZE) {
             auto [checkRealFileRes, realFileStatBuf] = CheckRealFileExist(recentFilePath);
diff --git a/interfaces/kits/native/trash/module.cpp b/interfaces/kits/native/trash/module.cpp
index 5d52b4cc..e0085db2 100644
--- a/interfaces/kits/native/trash/module.cpp
+++ b/interfaces/kits/native/trash/module.cpp
@@ -31,6 +31,10 @@ static napi_value Export(napi_env env, napi_value exports)
     products.emplace_back(make_unique<FileTrashNExporter>(env, exports));
 
     for (auto &&product : products) {
+        if (!product) {
+            HILOG_ERROR("product is nullptr");
+            return nullptr;
+        }
         string nExporterName = product->GetClassName();
         if (!product->Export()) {
             HILOG_ERROR("INNER BUG. Failed to export class %{public}s for module trash", nExporterName.c_str());
diff --git a/interfaces/kits/native/trash/src/file_trash_n_exporter.cpp b/interfaces/kits/native/trash/src/file_trash_n_exporter.cpp
index 52da4100..90b9feaa 100644
--- a/interfaces/kits/native/trash/src/file_trash_n_exporter.cpp
+++ b/interfaces/kits/native/trash/src/file_trash_n_exporter.cpp
@@ -96,7 +96,7 @@ static string GetTimeSlotFromPath(const string &path)
     // 获取时间戳目录位置
     size_t trashPathWithTimePrefixPos = realFilePathWithTime.find_first_of("/");
     if (trashPathWithTimePrefixPos == string::npos) {
-        HILOG_ERROR("GetTimeSlotFromPath: Invalid path = %{public}s", path.c_str());
+        HILOG_ERROR("GetTimeSlotFromPath: Invalid path = %{private}s", path.c_str());
         return "";
     }
     string timeSlot = realFilePathWithTime.substr(0, trashPathWithTimePrefixPos);
@@ -111,7 +111,7 @@ static int RecursiveFunc(const string &path, vector<string> &dirents)
         HILOG_ERROR("Failed to request heap memory.");
         return ENOMEM;
     }
-    HILOG_DEBUG("RecursiveFunc: scandir path = %{public}s", path.c_str());
+    HILOG_DEBUG("RecursiveFunc: scandir path = %{private}s", path.c_str());
     int num = scandir(path.c_str(), &(pNameList->namelist), FilterFunc, alphasort);
     if (num < 0) {
         HILOG_ERROR("RecursiveFunc: Failed to scan dir");
@@ -119,14 +119,18 @@ static int RecursiveFunc(const string &path, vector<string> &dirents)
     }
     pNameList->direntNum = num;
     string pathInRecur = path;
-    for (int i = 0; i < num; i++) {
+    for (uint32_t i = 0; i < num; i++) {
+        if (!pNameList->namelist) {
+            HILOG_ERROR("pNameList->namelist is nullptr.");
+            return ENOMEM;
+        }
         if ((*(pNameList->namelist[i])).d_type == DT_REG) {
             dirents.emplace_back(path + '/' + pNameList->namelist[i]->d_name);
         } else if ((*(pNameList->namelist[i])).d_type == DT_DIR) {
             string pathTemp = pathInRecur;
             pathInRecur += '/' + string((*(pNameList->namelist[i])).d_name);
             // check if path include TRASH_SUB_DIR + "/", need to add it into dirents
-            HILOG_DEBUG("RecursiveFunc: pathTemp = %{public}s", pathTemp.c_str());
+            HILOG_DEBUG("RecursiveFunc: pathTemp = %{private}s", pathTemp.c_str());
             string timeSlot = GetTimeSlotFromPath(pathTemp);
             if (!timeSlot.empty() && pathInRecur.rfind(TRASH_SUB_DIR + timeSlot + "/") != string::npos) {
                 // Only filter previous dir is TRASH_SUB_DIR
@@ -219,7 +223,7 @@ static string FindSourceFilePath(const string &path)
 
 static bool Mkdirs(const string &path, bool isDir, string &newRecoveredPath)
 {
-    HILOG_INFO("Mkdirs: path = %{public}s", path.c_str());
+    HILOG_INFO("Mkdirs: path = %{private}s", path.c_str());
     string recoveredPath = path;
     string folderName = "";
     size_t lastPos = 0;
@@ -240,7 +244,7 @@ static bool Mkdirs(const string &path, bool isDir, string &newRecoveredPath)
         lastPos = i;
         auto [isExist, ret] = Access(recoveredPath);
         if (!isExist && !Mkdir(recoveredPath)) {
-            HILOG_ERROR("Mkdirs fail for %{public}s ", recoveredPath.c_str());
+            HILOG_ERROR("Mkdirs fail for %{private}s ", recoveredPath.c_str());
             return false;
         }
         recoveredPath[i] = '/';
@@ -318,14 +322,14 @@ static int MoveFile(const string &srcFile, const string &destFile)
 
 static string RecurCheckIfOnlyContentInDir(const string &path, size_t trashWithTimePos, const string &trashWithTimePath)
 {
-    HILOG_INFO("RecurCheckIfOnlyContentInDir: path = %{public}s", path.c_str());
+    HILOG_INFO("RecurCheckIfOnlyContentInDir: path = %{private}s", path.c_str());
     size_t slashPos = path.find_last_of("/");
     if (slashPos <= trashWithTimePos) {
         HILOG_DEBUG("RecurCheckIfOnlyContentInDir: slashPos = %{public}zu", slashPos);
         return trashWithTimePath;
     }
     string parentPath = path.substr(0, slashPos);
-    HILOG_DEBUG("RecurCheckIfOnlyContentInDir: parentPath = %{public}s", parentPath.c_str());
+    HILOG_DEBUG("RecurCheckIfOnlyContentInDir: parentPath = %{private}s", parentPath.c_str());
     int num = ScanDir(parentPath);
     HILOG_DEBUG("RecurCheckIfOnlyContentInDir: num = %{public}d", num);
     if (num > 1) {
@@ -336,14 +340,14 @@ static string RecurCheckIfOnlyContentInDir(const string &path, size_t trashWithT
         // 需要向上一层目录判断
         return RecurCheckIfOnlyContentInDir(parentPath, trashWithTimePos, trashWithTimePath);
     } else {
-        HILOG_ERROR("RecurCheckIfOnlyContentInDir: invalid path = %{public}s", path.c_str());
+        HILOG_ERROR("RecurCheckIfOnlyContentInDir: invalid path = %{private}s", path.c_str());
     }
     return nullptr;
 }
 
 static string GetToDeletePath(const string &toDeletePath, napi_env env)
 {
-    HILOG_INFO("GetToDeletePath: toDeletePath = %{public}s", toDeletePath.c_str());
+    HILOG_INFO("GetToDeletePath: toDeletePath = %{private}s", toDeletePath.c_str());
     // 判断是否为有效回收站路径
     size_t slashSize = 1;
     // 获取/Trash目录位置
@@ -459,7 +463,7 @@ napi_value FileTrashNExporter::ListFile(napi_env env, napi_callback_info info)
 static napi_value RecoverFile(napi_env env, const string &filePath)
 {
     string sourceFilePath = FindSourceFilePath(filePath);
-    HILOG_INFO("RecoverFile: sourceFilePath = %{public}s", sourceFilePath.c_str());
+    HILOG_INFO("RecoverFile: sourceFilePath = %{private}s", sourceFilePath.c_str());
     string newDestPath = sourceFilePath;
     if (newDestPath.length() == 0 || !Mkdirs(sourceFilePath, false, newDestPath)) {
         HILOG_ERROR("RecoverFile: Mkdirs failed");
@@ -494,9 +498,9 @@ static int RecoverFilePart(vector<string> filePathList, map<string, string> dirP
     // 处理文件
     for (size_t j = 0; j < filePathList.size(); j++) {
         string filePath = filePathList[j];
-        HILOG_INFO("RecoverFilePart: filePath  = %{public}s", filePath.c_str());
+        HILOG_INFO("RecoverFilePart: filePath  = %{private}s", filePath.c_str());
         string sourceFilePath = FindSourceFilePath(filePath);
-        HILOG_INFO("RecoverFilePart: sourceFilePath  = %{public}s", sourceFilePath.c_str());
+        HILOG_INFO("RecoverFilePart: sourceFilePath  = %{private}s", sourceFilePath.c_str());
 
         size_t lastSlashPos = sourceFilePath.find_last_of("/");
         string fileName = sourceFilePath.substr(lastSlashPos + 1);
@@ -519,10 +523,10 @@ static map<string, string> MakeAndFindUpdateNameDir(vector<string> filterDirPath
     for (size_t j = 0; j < filterDirPathList.size(); j++) {
         string dirPath = filterDirPathList[j];
         string sourceFilePath = FindSourceFilePath(dirPath);
-        HILOG_DEBUG("MakeAndFindUpdateNameDir: sourceFilePath  = %{public}s", sourceFilePath.c_str());
+        HILOG_DEBUG("MakeAndFindUpdateNameDir: sourceFilePath  = %{private}s", sourceFilePath.c_str());
         string newDestPath = sourceFilePath;
         if (Mkdirs(sourceFilePath, true, newDestPath)) {
-            HILOG_DEBUG("MakeAndFindUpdateNameDir: newDestPath  = %{public}s", newDestPath.c_str());
+            HILOG_DEBUG("MakeAndFindUpdateNameDir: newDestPath  = %{private}s", newDestPath.c_str());
             if (newDestPath != sourceFilePath) {
                 dirPath2UpdatedNameMap.insert(make_pair(sourceFilePath, newDestPath));
             }
@@ -600,7 +604,7 @@ napi_value FileTrashNExporter::Recover(napi_env env, napi_callback_info info)
         return nullptr;
     }
     string uriStr = uriPtr.get();
-    HILOG_DEBUG("Recover: uriPtr.get()  = %{public}s", uriStr.c_str());
+    HILOG_DEBUG("Recover: uriPtr.get()  = %{private}s", uriStr.c_str());
 
     // 获取沙箱目录地址
     AppFileService::ModuleFileUri::FileUri fileUri(uriStr);
@@ -611,12 +615,12 @@ napi_value FileTrashNExporter::Recover(napi_env env, napi_callback_info info)
         HILOG_ERROR("Recover: Invalid Path");
         return nullptr;
     }
-    HILOG_DEBUG("Recover: path  = %{public}s", path.c_str());
+    HILOG_DEBUG("Recover: path  = %{private}s", path.c_str());
 
     // 判断是否是回收站路径
     if (path.find(FileTrashNExporter::trashPath_) == string::npos) {
         NError(EINVAL).ThrowErr(env);
-        HILOG_ERROR("Recover: path  = %{public}s is not Trash path", path.c_str());
+        HILOG_ERROR("Recover: path  = %{private}s is not Trash path", path.c_str());
         return nullptr;
     }
 
@@ -657,7 +661,7 @@ napi_value FileTrashNExporter::CompletelyDelete(napi_env env, napi_callback_info
     }
 
     string uriStr = uriPtr.get();
-    HILOG_DEBUG("Recover: uriPtr.get()  = %{public}s", uriStr.c_str());
+    HILOG_DEBUG("Recover: uriPtr.get()  = %{private}s", uriStr.c_str());
 
     // 获取沙箱目录地址
     AppFileService::ModuleFileUri::FileUri fileUri(uriStr);
@@ -668,12 +672,12 @@ napi_value FileTrashNExporter::CompletelyDelete(napi_env env, napi_callback_info
         HILOG_ERROR("Recover: Invalid Path");
         return nullptr;
     }
-    HILOG_DEBUG("Recover: path  = %{public}s", path.c_str());
+    HILOG_DEBUG("Recover: path  = %{private}s", path.c_str());
 
     // 判断是否是回收站路径
     if (path.find(FileTrashNExporter::trashPath_) == string::npos) {
         NError(EINVAL).ThrowErr(env);
-        HILOG_ERROR("Recover: path  = %{public}s is not Trash path", path.c_str());
+        HILOG_ERROR("Recover: path  = %{private}s is not Trash path", path.c_str());
         return nullptr;
     }
 
@@ -723,7 +727,7 @@ void FileTrashNExporter::InitTrashPath()
                 FileTrashNExporter::trashPath_ = "/storage/Users/" + userName + "/.Trash";
             }
         }
-        HILOG_INFO("GetRecentDir %{public}s", FileTrashNExporter::trashPath_.c_str());
+        HILOG_INFO("GetRecentDir %{private}s", FileTrashNExporter::trashPath_.c_str());
     }
 }
 
diff --git a/interfaces/kits/picker/src/modal_ui_callback.cpp b/interfaces/kits/picker/src/modal_ui_callback.cpp
index 6c09f6bc..d9b57398 100644
--- a/interfaces/kits/picker/src/modal_ui_callback.cpp
+++ b/interfaces/kits/picker/src/modal_ui_callback.cpp
@@ -34,6 +34,10 @@ void ModalUICallback::SetSessionId(int32_t sessionId)
 void ModalUICallback::OnRelease(int32_t releaseCode)
 {
     HILOG_INFO("[picker] OnRelease enter. release code is %{public}d", releaseCode);
+    if (!pickerCallBack_) {
+        HILOG_ERROR("[picker] OnRelease error");
+        return;
+    }
     this->uiContent->CloseModalUIExtension(this->sessionId_);
     pickerCallBack_->ready = true;
 }
@@ -48,6 +52,10 @@ void ModalUICallback::OnError(int32_t code, const std::string& name, const std::
 void ModalUICallback::OnResultForModal(int32_t resultCode, const OHOS::AAFwk::Want &result)
 {
     HILOG_INFO("[picker] OnResultForModal enter. resultCode is %{public}d,", resultCode);
+    if (!pickerCallBack_) {
+        HILOG_ERROR("[picker] OnResultForModal error.");
+        return;
+    }
     pickerCallBack_->resultCode = resultCode;
     pickerCallBack_->want = result;
 }
diff --git a/interfaces/kits/picker/src/picker_n_exporter.cpp b/interfaces/kits/picker/src/picker_n_exporter.cpp
index fdeea7d8..69fb72b3 100644
--- a/interfaces/kits/picker/src/picker_n_exporter.cpp
+++ b/interfaces/kits/picker/src/picker_n_exporter.cpp
@@ -51,6 +51,14 @@ static void StartModalPickerExecute(napi_env env, void *data)
 {
     HILOG_INFO("[picker]: StartModalPickerExecute begin");
     auto *context = static_cast<PickerAsyncContext*>(data);
+    if (!context) {
+        HILOG_ERROR("[picker]:context is nullptr");
+        return;
+    }
+    if (!context->pickerCallBack) {
+        HILOG_ERROR("[picker]:!context->pickerCallBack is nullptr");
+        return;
+    }
     while (!context->pickerCallBack->ready) {
         std::this_thread::sleep_for(std::chrono::milliseconds(WAIT_TIME_MS));
     }
@@ -60,6 +68,10 @@ static void StartModalPickerExecute(napi_env env, void *data)
 static void MakeResultWithArr(napi_env env, std::string key, napi_value &result,
     std::shared_ptr<PickerCallBack> pickerCallBack)
 {
+    if (pickerCallBack == nullptr) {
+        HILOG_ERROR("[picker]:pickerCallBack is nullptr");
+        return;
+    }
     napi_value array;
     napi_create_array(env, &array);
     napi_status status = napi_generic_failure;
@@ -87,6 +99,10 @@ static void MakeResultWithArr(napi_env env, std::string key, napi_value &result,
 static void MakeResultWithInt(napi_env env, std::string key, napi_value &result,
     std::shared_ptr<PickerCallBack> pickerCallBack)
 {
+    if (pickerCallBack == nullptr) {
+        HILOG_ERROR("[picker]: pickerCallBack is nullptr");
+        return;
+    }
     napi_status status = napi_generic_failure;
     if (pickerCallBack->want.GetParams().HasParam(key.c_str())) {
         const int32_t suffixindex = pickerCallBack->want.GetIntParam(key.c_str(), -1);
@@ -103,6 +119,10 @@ static void MakeResultWithInt(napi_env env, std::string key, napi_value &result,
 static void MakeResultWithBool(napi_env env, std::string key, napi_value &result,
     std::shared_ptr<PickerCallBack> pickerCallBack)
 {
+    if (pickerCallBack == nullptr) {
+        HILOG_ERROR("[picker]: pickerCallBack is nullptr");
+        return;
+    }
     napi_status status = napi_generic_failure;
     if (pickerCallBack->want.GetParams().HasParam(key.c_str())) {
         const bool boolVal = pickerCallBack->want.GetBoolParam(key.c_str(), false);
@@ -119,7 +139,7 @@ static void MakeResultWithBool(napi_env env, std::string key, napi_value &result
 static napi_value MakeResultWithPickerCallBack(napi_env env, std::shared_ptr<PickerCallBack> pickerCallBack)
 {
     if (pickerCallBack == nullptr) {
-        HILOG_ERROR("pickerCallBack is null");
+        HILOG_ERROR("[picker]: pickerCallBack is null");
         return nullptr;
     }
     napi_value result = nullptr;
@@ -227,6 +247,10 @@ static ErrCode GetCustomShowingWindow(napi_env env, AsyncContext &asyncContext,
     const napi_callback_info info, sptr<Rosen::Window> &window)
 {
     HILOG_INFO("[picker] GetCustomShowingWindow enter.");
+    if (!asyncContext) {
+        HILOG_ERROR("[picker] asyncContext is nullptr.");
+        return ERR_INV;
+    }
     napi_status status;
     if (!IsTypeRight(env, asyncContext->argv[ARGS_TWO], napi_object)) {
         HILOG_ERROR("[picker] The type of the parameter transferred to the window is not object.");
@@ -255,6 +279,10 @@ static ErrCode GetCustomShowingWindow(napi_env env, AsyncContext &asyncContext,
 Ace::UIContent *GetUIContent(napi_env env, napi_callback_info info,
     unique_ptr<PickerAsyncContext> &AsyncContext)
 {
+    if (!AsyncContext) {
+        HILOG_ERROR("[picker] asyncContext is nullptr.");
+        return nullptr;
+    }
     bool isStageMode = false;
     napi_status status = AbilityRuntime::IsStageContext(env, AsyncContext->argv[ARGS_ZERO], isStageMode);
     if (status != napi_ok || !isStageMode) {
@@ -334,6 +362,10 @@ static napi_status AsyncContextSetStaticObjectInfo(napi_env env, napi_callback_i
     AsyncContext &asyncContext, const size_t minArgs, const size_t maxArgs)
 {
     HILOG_INFO("[picker]: AsyncContextSetStaticObjectInfo begin.");
+    if (!asyncContext) {
+        HILOG_ERROR("[picker] asyncContext is nullptr.");
+        return napi_invalid_arg;
+    }
     napi_value thisVar = nullptr;
     asyncContext->argc = maxArgs;
     napi_status ret = napi_get_cb_info(env, info, &asyncContext->argc, &(asyncContext->argv[ARGS_ZERO]),
diff --git a/services/native/file_access_service/src/file_access_service.cpp b/services/native/file_access_service/src/file_access_service.cpp
index 1b76afee..200c8a87 100644
--- a/services/native/file_access_service/src/file_access_service.cpp
+++ b/services/native/file_access_service/src/file_access_service.cpp
@@ -71,6 +71,9 @@ void FileAccessService::OnStart()
     UserAccessTracer trace;
     trace.Start("OnStart");
     sptr<FileAccessService> service = FileAccessService::GetInstance();
+    if (service == nullptr) {
+        HILOG_ERROR("service is nullptr");
+    }
     service->Init();
     if (!Publish(service)) {
         HILOG_ERROR("OnStart register to system ability manager failed");
@@ -249,6 +252,10 @@ void FileAccessService::ObserverDeathRecipient::OnRemoteDied(const wptr<IRemoteO
 void FileAccessService::CleanRelativeObserver(const sptr<IFileAccessObserver> &observer)
 {
     shared_ptr<ObserverContext> obsContext = make_shared<ObserverContext>(observer);
+    if (obsContext == nullptr) {
+        HILOG_ERROR("obsContext is nullptr");
+        return;
+    }
     uint32_t code = obsManager_.getId([obsContext](const shared_ptr<ObserverContext>  &afterContext) {
         return obsContext->EqualTo(afterContext);
     });
@@ -306,7 +313,7 @@ int32_t FileAccessService::OperateObsNode(Uri &uri, bool notifyForDescendants, u
     const std::shared_ptr<ConnectExtensionInfo> &info)
 {
     string uriStr = uri.ToString();
-    HILOG_INFO("OperateObsNode uriStr: %{public}s", uriStr.c_str());
+    HILOG_INFO("OperateObsNode uriStr: %{private}s", uriStr.c_str());
     {
         lock_guard<mutex> lock(nodeMutex_);
         auto iter = relationshipMap_.find(uriStr);
@@ -409,7 +416,7 @@ void FileAccessService::RemoveRelations(string &uriStr, shared_ptr<ObserverNode>
 
 int FileAccessService::FindUri(const string &uriStr, shared_ptr<ObserverNode> &outObsNode)
 {
-    HILOG_INFO("uriStr: %{public}s", uriStr.c_str());
+    HILOG_INFO("uriStr: %{private}s", uriStr.c_str());
     lock_guard<mutex> lock(nodeMutex_);
     HILOG_DEBUG("FindUri start");
     auto iter = relationshipMap_.find(uriStr);
@@ -783,6 +790,10 @@ void FileAccessService::AddAppProxy(const sptr<AAFwk::IAbilityConnection>& conne
         HILOG_INFO("sa had proxy,needn't create connection");
         return;
     }
+    if (connection->AsObject() == nullptr) {
+        HILOG_ERROR("connection->AsObject() is nullptr");
+        return;
+    }
     connection->AsObject()->AddDeathRecipient(appDeathRecipient_);
     appProxyMap_[key] = value;
     appConnection_[key] = connection;
diff --git a/utils/file_util.h b/utils/file_util.h
index e937c8e4..e0477960 100644
--- a/utils/file_util.h
+++ b/utils/file_util.h
@@ -52,7 +52,11 @@ static void Deleter(struct NameListArg *arg)
         HILOG_ERROR("invalid argument");
         return;
     }
-    for (int i = 0; i < arg->direntNum; i++) {
+    if (arg->namelist == nullptr) {
+        HILOG_ERROR("arg->namelist is nullptr");
+        return;
+    }
+    for (uint32_t i = 0; i < arg->direntNum; i++) {
         free((arg->namelist)[i]);
         (arg->namelist)[i] = nullptr;
     }
@@ -274,7 +278,7 @@ static int ScanDir(const string &path)
         HILOG_ERROR("Failed to request heap memory.");
         return ENOMEM;
     }
-    HILOG_INFO("RecursiveFunc: scandir path = %{public}s", path.c_str());
+    HILOG_INFO("RecursiveFunc: scandir path = %{private}s", path.c_str());
     return scandir(path.c_str(), &(pNameList->namelist), FilterFunc, alphasort);
 }
 } // OHOS::FileManagement
\ No newline at end of file