diff --git a/common/src/utils/dh_log.cpp b/common/src/utils/dh_log.cpp
index 4aa9ffa90f4855c949d29b4f65229b873aab9ab1..91403c9c07f08876df9b0de3d11a42c6194bed69 100644
--- a/common/src/utils/dh_log.cpp
+++ b/common/src/utils/dh_log.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2022-2024 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -76,8 +76,6 @@ void DHLog(DHLogLevel logLevel, const char *fmt, ...)
 {
     char logBuf[LOG_MAX_LEN] = {0};
     va_list arg;
-
-    (void)memset_s(&arg, sizeof(va_list), 0, sizeof(va_list));
     va_start(arg, fmt);
     int32_t ret = vsprintf_s(logBuf, sizeof(logBuf), fmt, arg);
     va_end(arg);
diff --git a/services/cameraservice/cameraoperator/client/src/dcamera_client.cpp b/services/cameraservice/cameraoperator/client/src/dcamera_client.cpp
index f99a23e7f883863f7738601e10ee3b51d2949e23..986624309becce1154be14d91f2ec996ff5ed47d 100644
--- a/services/cameraservice/cameraoperator/client/src/dcamera_client.cpp
+++ b/services/cameraservice/cameraoperator/client/src/dcamera_client.cpp
@@ -35,7 +35,9 @@ namespace DistributedHardware {
 DCameraClient::DCameraClient(const std::string& dhId)
 {
     DHLOGI("DCameraClient Constructor dhId: %{public}s", GetAnonyString(dhId).c_str());
-    cameraId_ = dhId.substr(CAMERA_ID_PREFIX.size());
+    if (dhId.size() >= CAMERA_ID_PREFIX.size()) {
+        cameraId_ = dhId.substr(CAMERA_ID_PREFIX.size());
+    }
     isInit_ = false;
 }
 
diff --git a/services/cameraservice/sourceservice/src/distributedcameramgr/dcameradata/dcamera_stream_data_process.cpp b/services/cameraservice/sourceservice/src/distributedcameramgr/dcameradata/dcamera_stream_data_process.cpp
index 93daa0f1c578a2a51f38aa00f8400add87c110ad..5747a9b5f976b785799f37fb40f70cb358c5e234 100644
--- a/services/cameraservice/sourceservice/src/distributedcameramgr/dcameradata/dcamera_stream_data_process.cpp
+++ b/services/cameraservice/sourceservice/src/distributedcameramgr/dcameradata/dcamera_stream_data_process.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2024 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -186,6 +186,7 @@ int32_t DCameraStreamDataProcess::GetProducerSize()
 
 void DCameraStreamDataProcess::FeedStreamToSnapShot(const std::shared_ptr<DataBuffer>& buffer)
 {
+    CHECK_AND_RETURN_LOG(buffer == nullptr, "buffer is nullptr.");
     uint64_t buffersSize = static_cast<uint64_t>(buffer->Size());
     DHLOGD("DCameraStreamDataProcess FeedStreamToSnapShot devId %{public}s dhId %{public}s streamType %{public}d "
         "streamSize: %{public}" PRIu64, GetAnonyString(devId_).c_str(), GetAnonyString(dhId_).c_str(),
@@ -198,6 +199,7 @@ void DCameraStreamDataProcess::FeedStreamToSnapShot(const std::shared_ptr<DataBu
 
 void DCameraStreamDataProcess::FeedStreamToContinue(const std::shared_ptr<DataBuffer>& buffer)
 {
+    CHECK_AND_RETURN_LOG(buffer == nullptr, "buffer is nullptr.");
     uint64_t buffersSize = static_cast<uint64_t>(buffer->Size());
     DHLOGD("DCameraStreamDataProcess FeedStreamToContinue devId %{public}s dhId %{public}s streamType %{public}d "
         "streamSize: %{public}" PRIu64, GetAnonyString(devId_).c_str(), GetAnonyString(dhId_).c_str(),