diff --git a/test/fuzztest/backupext_fuzzer/backupext_fuzzer.cpp b/test/fuzztest/backupext_fuzzer/backupext_fuzzer.cpp
index 158ced24f55d55f798d96a7727d3444eb41f202a..9cb7b8d55edb28275638e5d2eaca7577abc88384 100644
--- a/test/fuzztest/backupext_fuzzer/backupext_fuzzer.cpp
+++ b/test/fuzztest/backupext_fuzzer/backupext_fuzzer.cpp
@@ -57,6 +57,7 @@ bool OnRemoteRequestFuzzTest(shared_ptr<BackupExtExtension> extension, const uin
 
 bool InitFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
+    (void)data;
     shared_ptr<AbilityRuntime::AbilityLocalRecord> record = nullptr;
     shared_ptr<AbilityRuntime::OHOSApplication> application = nullptr;
     shared_ptr<AbilityRuntime::AbilityHandler> handler = nullptr;
@@ -96,20 +97,22 @@ bool OnConnectFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t
 
 bool CreateFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
-    unique_ptr<AbilityRuntime::Runtime> runtime;
+    (void)data;
+    unique_ptr<AbilityRuntime::Runtime> runtime = nullptr;
     backup->Create(runtime);
     return true;
 }
 
 bool GetExtensionActionFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
+    (void)data;
     backup->GetExtensionAction();
     return true;
 }
 
 bool OnRestoreFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
-    function<void(ErrCode, string)> callback;
+    function<void(ErrCode, string)> callback = [data](ErrCode, string) {};
     function<void(ErrCode, const string)> callbackEx;
     backup->OnRestore(callback, callbackEx);
     return true;
@@ -117,25 +120,28 @@ bool OnRestoreFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t
 
 bool GetBackupInfoFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
-    function<void(ErrCode, string)> callback = nullptr;
+    function<void(ErrCode, string)> callback = [data](ErrCode, string) {};
     backup->GetBackupInfo(callback);
     return true;
 }
 
 bool WasFromSpecialVersionFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
+    (void)data;
     backup->WasFromSpecialVersion();
     return true;
 }
 
 bool SpecialVersionForCloneAndCloudFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
+    (void)data;
     backup->SpecialVersionForCloneAndCloud();
     return true;
 }
 
 bool RestoreDataReadyFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
+    (void)data;
     backup->RestoreDataReady();
     return true;
 }
@@ -149,6 +155,7 @@ bool InvokeAppExtMethodFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *dat
 
 bool SetCreatorFuzzTest(shared_ptr<ExtBackup> backup, const uint8_t *data, size_t size)
 {
+    (void)data;
     CreatorFunc creator;
     backup->SetCreator(creator);
     return true;
@@ -169,6 +176,7 @@ bool CmdHandleClearFuzzTest(shared_ptr<BackupExtExtension> extension, const uint
     MessageParcel msg;
     MessageParcel reply;
 
+    msg.WriteBuffer(data, size);
     extension->CmdHandleClear(msg, reply);
     return true;
 }
@@ -269,6 +277,7 @@ bool CmdGetIncrementalBackupFileHandleFuzzTest(shared_ptr<BackupExtExtension> ex
     MessageParcel msg;
     MessageParcel reply;
 
+    msg.WriteBuffer(data, size);
     extension->CmdGetIncrementalBackupFileHandle(msg, reply);
     return true;
 }
diff --git a/test/fuzztest/backupservicestub_fuzzer/backupservicestub_fuzzer.cpp b/test/fuzztest/backupservicestub_fuzzer/backupservicestub_fuzzer.cpp
index b3c714e657930d70deb33921cba61a1f83e6e395..a23175a130750dc45f615dd99ef56889bd3c4433 100644
--- a/test/fuzztest/backupservicestub_fuzzer/backupservicestub_fuzzer.cpp
+++ b/test/fuzztest/backupservicestub_fuzzer/backupservicestub_fuzzer.cpp
@@ -79,6 +79,7 @@ bool CmdInitRestoreSessionFuzzTest(sptr<Service> service, const uint8_t *data, s
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         BSessionRestore::Callbacks callbacks;
         msg.WriteRemoteObject(new ServiceReverse(callbacks));
         service->CmdInitRestoreSession(msg, reply);
@@ -94,6 +95,7 @@ bool CmdInitBackupSessionFuzzTest(sptr<Service> service, const uint8_t *data, si
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         BSessionBackup::Callbacks callbacks;
         msg.WriteRemoteObject(new ServiceReverse(callbacks));
         service->CmdInitBackupSession(msg, reply);
@@ -109,6 +111,7 @@ bool CmdStartFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         service->CmdStart(msg, reply);
     } catch (OHOS::FileManagement::Backup::BError &err) {
         // Only filter BError errors, Other results are not expected.
@@ -122,6 +125,7 @@ bool CmdGetLocalCapabilitiesFuzzTest(sptr<Service> service, const uint8_t *data,
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         service->CmdGetLocalCapabilities(msg, reply);
     } catch (OHOS::FileManagement::Backup::BError &err) {
         // Only filter BError errors, Other results are not expected.
@@ -337,6 +341,7 @@ bool CmdFinishFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
     MessageParcel msg;
     MessageParcel reply;
     try {
+        msg.WriteBuffer(data, size);
         service->CmdFinish(msg, reply);
     } catch (OHOS::FileManagement::Backup::BError &err) {
         // Only filter BError errors, Other results are not expected.
@@ -349,6 +354,7 @@ bool CmdFinishFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
     MessageParcel msg;
     MessageParcel reply;
     try {
+        msg.WriteBuffer(data, size);
         service->CmdRelease(msg, reply);
     } catch (OHOS::FileManagement::Backup::BError &err) {
         // Only filter BError errors, Other results are not expected.
@@ -377,6 +383,7 @@ bool CmdGetAppLocalListAndDoIncrementalBackupFuzzTest(sptr<Service> service, con
     MessageParcel msg;
     MessageParcel reply;
     try {
+        msg.WriteBuffer(data, size);
         service->CmdGetAppLocalListAndDoIncrementalBackup(msg, reply);
     } catch (OHOS::FileManagement::Backup::BError &err) {
         // Only filter BError errors, Other results are not expected.
@@ -392,6 +399,7 @@ bool CmdInitIncrementalBackupSessionFuzzTest(sptr<Service> service, const uint8_
     try {
         BIncrementalBackupSession::Callbacks callbacks;
         msg.WriteRemoteObject(new ServiceReverse(callbacks));
+        msg.WriteBuffer(data, size);
         service->CmdInitIncrementalBackupSession(msg, reply);
     } catch (OHOS::FileManagement::Backup::BError &err) {
         // Only filter BError errors, Other results are not expected.
diff --git a/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.cpp b/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.cpp
index 4d2ba23426f3c59bd2f856b61fa6478a90a44e6d..e5558102895943f89beac1d98d437e63294ea2fc 100644
--- a/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.cpp
+++ b/test/fuzztest/backupservicestubbranch_fuzzer/backupservicestubbranch_fuzzer.cpp
@@ -227,6 +227,7 @@ bool CmdInitRestoreSessionFuzzTest(sptr<Service> service, const uint8_t *data, s
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         service->CmdInitRestoreSession(msg, reply);
 
         BSessionRestore::Callbacks callbacks;
@@ -250,6 +251,7 @@ bool CmdInitBackupSessionFuzzTest(sptr<Service> service, const uint8_t *data, si
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         service->CmdInitBackupSession(msg, reply);
 
         BSessionBackup::Callbacks callbacks;
@@ -273,6 +275,7 @@ bool CmdStartFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         ExpectReturn({false});
         service->CmdStart(msg, reply);
 
@@ -290,6 +293,7 @@ bool CmdGetLocalCapabilitiesFuzzTest(sptr<Service> service, const uint8_t *data,
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         ExpectReturn({false});
         service->CmdGetLocalCapabilities(msg, reply);
 
@@ -622,6 +626,7 @@ bool CmdFinishFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
     MessageParcel msg;
     MessageParcel reply;
     try {
+        msg.WriteBuffer(data, size);
         ExpectReturn({false});
         service->CmdFinish(msg, reply);
 
@@ -638,6 +643,7 @@ bool CmdFinishFuzzTest(sptr<Service> service, const uint8_t *data, size_t size)
     MessageParcel msg;
     MessageParcel reply;
     try {
+        msg.WriteBuffer(data, size);
         service->CmdRelease(msg, reply);
     } catch (OHOS::FileManagement::Backup::BError &err) {
         // Only filter BError errors, Other results are not expected.
@@ -680,6 +686,7 @@ bool CmdGetAppLocalListAndDoIncrementalBackupFuzzTest(sptr<Service> service, con
     MessageParcel msg;
     MessageParcel reply;
     try {
+        msg.WriteBuffer(data, size);
         ExpectReturn({false});
         service->CmdGetAppLocalListAndDoIncrementalBackup(msg, reply);
 
@@ -697,6 +704,7 @@ bool CmdInitIncrementalBackupSessionFuzzTest(sptr<Service> service, const uint8_
     MessageParcel reply;
 
     try {
+        msg.WriteBuffer(data, size);
         service->CmdInitIncrementalBackupSession(msg, reply);
 
         BIncrementalBackupSession::Callbacks callbacks;