diff --git a/test/servicesfuzztest/dmsoftbuslistener_fuzzer/dm_softbus_listener_fuzzer.cpp b/test/servicesfuzztest/dmsoftbuslistener_fuzzer/dm_softbus_listener_fuzzer.cpp
index 15fa538c376e8d0da080438499d77a26831966d2..c2471bb76c80e64816efd178a8ce09417acfca5e 100644
--- a/test/servicesfuzztest/dmsoftbuslistener_fuzzer/dm_softbus_listener_fuzzer.cpp
+++ b/test/servicesfuzztest/dmsoftbuslistener_fuzzer/dm_softbus_listener_fuzzer.cpp
@@ -29,6 +29,25 @@
 
 namespace OHOS {
 namespace DistributedHardware {
+void DmSoftbusListenerFuzzTestNext(FuzzedDataProvider &fdp)
+{
+    SoftbusListener listener;
+    std::string networkIdStr = fdp.ConsumeRandomLengthString();
+    if (!networkIdStr.empty()) { 
+        int32_t networkType = fdp.ConsumeIntegral<std::int32_t>();
+        listener.GetNetworkTypeByNetworkId(networkIdStr.c_str(), networkType);
+    }
+    std::string name = fdp.ConsumeRandomLengthString();
+    SoftbusListener::CloseDmRadarHelperObj(name);
+    std::string msg = fdp.ConsumeRandomLengthString();
+    listener.SendAclChangedBroadcast(msg);
+    int32_t screenStatus = fdp.ConsumeIntegral<std::int32_t>();
+    listener.GetDeviceScreenStatus(networkIdStr.c_str(), screenStatus);
+    listener.DeleteCacheDeviceInfo();
+    std::string displayName = fdp.ConsumeRandomLengthString();
+    listener.SetLocalDisplayName(displayName);
+}
+
 void DmSoftbusListenerFuzzTest(const uint8_t* data, size_t size)
 {
     if ((data == nullptr) || (size <  (sizeof(uint16_t) + (sizeof(int32_t) + sizeof(int32_t))) ||
@@ -49,10 +68,12 @@ void DmSoftbusListenerFuzzTest(const uint8_t* data, size_t size)
     SoftbusListener::CredentialAuthStatusProcess(proofInfoStr, deviceTypeId, errcode);
     const char* proofInfo = proofInfoStr.c_str();
     DevUserInfo localDevUserInfo;
-    localDevUserInfo.deviceId = fdp.ConsumeRandomLengthString();
+    std::string localDeviceId = fdp.ConsumeRandomLengthString(DM_MAX_DEVICE_ID_LEN);
+    localDevUserInfo.deviceId = localDeviceId.substr(0, DM_MAX_DEVICE_ID_LEN - 1);
     localDevUserInfo.userId = fdp.ConsumeIntegral<std::int32_t>();
     DevUserInfo remoteDevUserInfo;
-    remoteDevUserInfo.deviceId = fdp.ConsumeRandomLengthString();
+    std::string remoteDeviceId = fdp.ConsumeRandomLengthString(DM_MAX_DEVICE_ID_LEN);
+    remoteDevUserInfo.deviceId = remoteDeviceId.substr(0, DM_MAX_DEVICE_ID_LEN - 1);
     remoteDevUserInfo.userId = fdp.ConsumeIntegral<std::int32_t>();
     string remoteAclList = fdp.ConsumeRandomLengthString();
     SoftbusListener::OnSyncLocalAclList(localDevUserInfo, remoteDevUserInfo, remoteAclList);
@@ -67,17 +88,7 @@ void DmSoftbusListenerFuzzTest(const uint8_t* data, size_t size)
     status.basicInfo.osType = fdp.ConsumeIntegral<std::uint32_t>();
     status.reserved[0] = fdp.ConsumeIntegral<std::uint16_t>();
     SoftbusListener::OnDeviceScreenStatusChanged(type, &status);
-    SoftbusListener listener;
-    std::string networkIdStr = fdp.ConsumeRandomLengthString();
-    int32_t networkType = fdp.ConsumeIntegral<std::int32_t>();
-    listener.GetNetworkTypeByNetworkId(networkIdStr.c_str(), networkType);
-    std::string name = fdp.ConsumeRandomLengthString();
-    SoftbusListener::CloseDmRadarHelperObj(name);
-    std::string msg = fdp.ConsumeRandomLengthString();
-    listener.SendAclChangedBroadcast(msg);
-    int32_t screenStatus = fdp.ConsumeIntegral<std::int32_t>();
-    listener.GetDeviceScreenStatus(networkId, screenStatus);
-    listener.DeleteCacheDeviceInfo();
+    DmSoftbusListenerFuzzTestNext(fdp);
 }
 }
 }