diff --git a/common/include/input_hub.cpp b/common/include/input_hub.cpp
index 3364826..f80f3f7 100644
--- a/common/include/input_hub.cpp
+++ b/common/include/input_hub.cpp
@@ -352,8 +352,6 @@ std::vector<InputDevice> InputHub::GetAllInputDevices()
 
 void InputHub::ScanInputDevices(const std::string& dirname)
 {
-    char devname[PATH_MAX];
-    char *filename;
     DIR *dir;
     struct dirent *de;
     dir = opendir(dirname.c_str());
@@ -362,22 +360,14 @@ void InputHub::ScanInputDevices(const std::string& dirname)
         return;
     }
 
-    if (strcpy_s(devname, PATH_MAX, dirname.c_str()) != 0) {
-        DHLOGE("error strcpy_s :%{public}s\n", strerror(errno));
-    }
-    filename = devname + strlen(devname);
-    *filename++ = '/';
     while ((de = readdir(dir))) {
         if (de->d_name[0] == '.' &&
             (de->d_name[1] == '\0' ||
             (de->d_name[1] == '.' && de->d_name[DIR_FILE_NAME_SECOND] == '\0'))) {
             continue;
         }
-        if (strcpy_s(filename, sizeof(de->d_name), de->d_name) != 0) {
-            DHLOGE("error strcpy_s second :%{public}s\n", strerror(errno));
-        }
-        DHLOGE("scan dir failed for %{public}s", filename);
-        OpenInputDeviceLocked(devname);
+        std::string devName = dirname + "/" + std::string(de->d_name);
+        OpenInputDeviceLocked(devName);
     }
     closedir(dir);
 }
diff --git a/common/include/white_list_util.cpp b/common/include/white_list_util.cpp
index 60d8a78..25c3e6d 100644
--- a/common/include/white_list_util.cpp
+++ b/common/include/white_list_util.cpp
@@ -28,7 +28,6 @@ namespace OHOS {
 namespace DistributedHardware {
 namespace DistributedInput {
 namespace {
-    const char* WHITE_LIST_FILE_PATH = "/etc/dinput_business_event_whitelist.cfg";
     const char* SPLIT_LINE = "|";
     const char* SPLIT_COMMA = ",";
 }
@@ -50,6 +49,7 @@ int32_t WhiteListUtil::Init(const std::string &deviceId)
 {
     DHLOGI("start, deviceId=%s", GetAnonyString(deviceId).c_str());
     ClearWhiteList();
+    const char* whiteListFilePath = "/etc/dinput_business_event_whitelist.cfg";
 
     if (deviceId.empty()) {
         // device id error
@@ -57,10 +57,10 @@ int32_t WhiteListUtil::Init(const std::string &deviceId)
         return ERR_DH_INPUT_WHILTELIST_INIT_FAIL;
     }
 
-    std::ifstream inFile(WHITE_LIST_FILE_PATH, std::ios::in | std::ios::binary);
+    std::ifstream inFile(whiteListFilePath, std::ios::in | std::ios::binary);
     if (!inFile.is_open()) {
         // file open error
-        DHLOGE("%s error, file open fail path=%s", __func__, WHITE_LIST_FILE_PATH);
+        DHLOGE("%s error, file open fail path=%s", __func__, whiteListFilePath);
         return ERR_DH_INPUT_WHILTELIST_INIT_FAIL;
     }
 
diff --git a/interfaces/inner_kits/test/unittest/distributed_input_inner_test.cpp b/interfaces/inner_kits/test/unittest/distributed_input_inner_test.cpp
index a99ab13..27d4200 100644
--- a/interfaces/inner_kits/test/unittest/distributed_input_inner_test.cpp
+++ b/interfaces/inner_kits/test/unittest/distributed_input_inner_test.cpp
@@ -39,10 +39,8 @@ void DistributedInputInnerTest::TearDownTestCase()
 {
 }
 
-
 void DistributedInputInnerTest::TestPrepareDInputCallback::OnResult(
     const std::string& deviceId, const int32_t& status)
-
 {
     (void)deviceId;
     (void)status;
@@ -69,6 +67,9 @@ void DistributedInputInnerTest::TestStartDInputCallback::OnResult(
 void DistributedInputInnerTest::TestStopDInputCallback::OnResult(
     const std::string& deviceId, const uint32_t& inputTypes, const int32_t& status)
 {
+    (void)deviceId;
+    (void)inputTypes;
+    (void)status;
     return;
 }
 
diff --git a/interfaces/ipc/include/distributed_input_source_stub.h b/interfaces/ipc/include/distributed_input_source_stub.h
index 2805b8b..ba93d7e 100644
--- a/interfaces/ipc/include/distributed_input_source_stub.h
+++ b/interfaces/ipc/include/distributed_input_source_stub.h
@@ -34,6 +34,8 @@ public:
         uint32_t code, MessageParcel &data, MessageParcel &reply, MessageOption &option) override;
 
 private:
+    int32_t HandleInitDistributedHardware(MessageParcel &reply);
+    int32_t HandleReleaseDistributedHardware(MessageParcel &reply);
     int32_t HandleRegisterDistributedHardware(MessageParcel &data, MessageParcel &reply);
     int32_t HandleUnregisterDistributedHardware(MessageParcel &data, MessageParcel &reply);
     int32_t HandlePrepareRemoteInput(MessageParcel &data, MessageParcel &reply);
diff --git a/interfaces/ipc/src/distributed_input_source_stub.cpp b/interfaces/ipc/src/distributed_input_source_stub.cpp
index 30359f0..bdb8151 100644
--- a/interfaces/ipc/src/distributed_input_source_stub.cpp
+++ b/interfaces/ipc/src/distributed_input_source_stub.cpp
@@ -27,6 +27,24 @@ DistributedInputSourceStub::DistributedInputSourceStub()
 DistributedInputSourceStub::~DistributedInputSourceStub()
 {}
 
+int32_t DistributedInputSourceStub::HandleInitDistributedHardware(MessageParcel &reply)
+{
+    int32_t ret = Init();
+    if (!reply.WriteInt32(ret)) {
+        return ERR_DH_INPUT_SOURCE_STUB_ON_REMOTE_REQUEST_FAIL;
+    }
+    return DH_SUCCESS;
+}
+
+int32_t DistributedInputSourceStub::HandleReleaseDistributedHardware(MessageParcel &reply)
+{
+    int32_t ret = Release();
+    if (!reply.WriteInt32(ret)) {
+        return ERR_DH_INPUT_SOURCE_STUB_ON_REMOTE_REQUEST_FAIL;
+    }
+    return DH_SUCCESS;
+}
+
 int32_t DistributedInputSourceStub::HandleRegisterDistributedHardware(MessageParcel &data, MessageParcel &reply)
 {
     std::string devId = data.ReadString();
@@ -120,21 +138,11 @@ int32_t DistributedInputSourceStub::OnRemoteRequest(uint32_t code, MessageParcel
 {
     switch (code) {
         case static_cast<uint32_t>(IDistributedSourceInput::MessageCode::INIT): {
-            int32_t ret = Init();
-            if (!reply.WriteInt32(ret)) {
-                return ERR_DH_INPUT_SOURCE_STUB_ON_REMOTE_REQUEST_FAIL;
-            } else {
-                return DH_SUCCESS;
-            }
+            return HandleInitDistributedHardware(reply);
             break;
         }
         case static_cast<uint32_t>(IDistributedSourceInput::MessageCode::RELEASE): {
-            int32_t ret = Release();
-            if (!reply.WriteInt32(ret)) {
-                return ERR_DH_INPUT_SOURCE_STUB_ON_REMOTE_REQUEST_FAIL;
-            } else {
-                return DH_SUCCESS;
-            }
+            return HandleReleaseDistributedHardware(reply);
             break;
         }
         case static_cast<uint32_t>(IDistributedSourceInput::MessageCode::REGISTER_REMOTE_INPUT): {
diff --git a/test/fuzztest/distributedinputkit_fuzzer/distributed_input_kit_fuzzer.h b/test/fuzztest/distributedinputkit_fuzzer/distributed_input_kit_fuzzer.h
index 174aa3d..a329e61 100644
--- a/test/fuzztest/distributedinputkit_fuzzer/distributed_input_kit_fuzzer.h
+++ b/test/fuzztest/distributedinputkit_fuzzer/distributed_input_kit_fuzzer.h
@@ -13,7 +13,6 @@
  * limitations under the License.
  */
 
-
 #ifndef DISTRIBUTED_INPUT_KIT_FUZZER_H
 #define DISTRIBUTED_INPUT_KIT_FUZZER_H