diff --git a/interfaces/inner_kits/native_cpp/test/fuzztest/sourceservicereleasesource_fuzzer/sourceservicereleasesource_fuzzer.cpp b/interfaces/inner_kits/native_cpp/test/fuzztest/sourceservicereleasesource_fuzzer/sourceservicereleasesource_fuzzer.cpp
index bdf66faf0844188c3be2ea4bb4be15ca2c2be9d0..b8b0f871b697e73287fb73e2274e6b4eff49c102 100644
--- a/interfaces/inner_kits/native_cpp/test/fuzztest/sourceservicereleasesource_fuzzer/sourceservicereleasesource_fuzzer.cpp
+++ b/interfaces/inner_kits/native_cpp/test/fuzztest/sourceservicereleasesource_fuzzer/sourceservicereleasesource_fuzzer.cpp
@@ -28,7 +28,6 @@ void SourceServiceReleaseSourceFuzzTest(const uint8_t* data, size_t size)
     if ((data == nullptr) || (size == 0)) {
         return;
     }
-    std::string params(reinterpret_cast<const char*>(data), size);
 
     std::shared_ptr<DistributedCameraSourceService> sourceService =
         std::make_shared<DistributedCameraSourceService>(DISTRIBUTED_HARDWARE_CAMERA_SOURCE_SA_ID, true);
diff --git a/services/cameraservice/sinkservice/src/distributedcamera/distributed_camera_sink_service.cpp b/services/cameraservice/sinkservice/src/distributedcamera/distributed_camera_sink_service.cpp
index c48916b4e53513f6bcc476d56a667b191bbcfe89..54aec91c87ceea643cb7a08c68911a2cc73f444d 100644
--- a/services/cameraservice/sinkservice/src/distributedcamera/distributed_camera_sink_service.cpp
+++ b/services/cameraservice/sinkservice/src/distributedcamera/distributed_camera_sink_service.cpp
@@ -263,6 +263,7 @@ int32_t DistributedCameraSinkService::OpenChannel(const std::string& dhId, std::
     DHLOGI("dhId: %s", GetAnonyString(dhId).c_str());
     std::shared_ptr<DCameraSinkDev> sinkDevice = nullptr;
     {
+        std::lock_guard<std::mutex> lock(mapMutex_);
         auto iter = camerasMap_.find(dhId);
         if (iter == camerasMap_.end()) {
             DHLOGE("device not found");