diff --git a/build/protoc.sh b/build/protoc.sh
index 94390842defde2af9cb97e453862ecc125a2194f..01861dc74195e718dbb658bb583c3d180770b791 100755
--- a/build/protoc.sh
+++ b/build/protoc.sh
@@ -28,7 +28,7 @@ LAST_ARG_INDEX=$(($NUM_ARGS))
 INDEP_COMPLIER=${!LAST_ARG_INDEX}
 
 PROTOC=$PROJECT_TOP/$2/thirdparty/protobuf/protoc
-if [ ! -e $PROTOC ] ; then
+if [ ! -e "$PROTOC" ] ; then
   if [[ "$INDEP_COMPLIER" == true ]]; then
     PROTOC=$PROJECT_TOP/binarys/third_party/protobuf/innerapis/protoc/clang_x64/libs/protoc
   fi
diff --git a/device/cmds/src/main.cpp b/device/cmds/src/main.cpp
index 6a4e8840d305285e1bbd27828799778e4aa4aa01..04e58339239de80b2f15a152c9ce74c7656d1086 100644
--- a/device/cmds/src/main.cpp
+++ b/device/cmds/src/main.cpp
@@ -67,7 +67,10 @@ std::string GetLoopbackAddress()
     struct ifaddrs* ifAddrStruct = nullptr;
     void* tmpAddrPtr = nullptr;
 
-    getifaddrs(&ifAddrStruct);
+    if (getifaddrs(&ifAddrStruct) == -1) { // -1 : fail
+        printf("error: %s\n", COMMON::GetErrorMsg().c_str());
+        return "";
+    }
     while (ifAddrStruct != nullptr) {
         if (ifAddrStruct->ifa_addr == nullptr) {
             ifAddrStruct = ifAddrStruct->ifa_next;
diff --git a/device/plugins/native_daemon/src/hook_manager.cpp b/device/plugins/native_daemon/src/hook_manager.cpp
index bddd068e084b88c5210f4042968b49f1f1ec104b..55501f7caaf28f9a431fd9954b05042c726fc443 100644
--- a/device/plugins/native_daemon/src/hook_manager.cpp
+++ b/device/plugins/native_daemon/src/hook_manager.cpp
@@ -596,9 +596,9 @@ bool HookManager::DestroyPluginSession(const std::vector<uint32_t>& pluginIds)
         }
     }
     for (const auto& item : hookCtx_) {
-        for (int i = 0; i < item->eventPollerList.size(); ++i) {
+        for (size_t i = 0; i < item->eventPollerList.size(); ++i) {
             if (item->eventPollerList[i] && item->eventNotifierList[i]) {
-                PROFILER_LOG_ERROR(LOG_CORE, "eventPoller unset! num: %d", i);
+                PROFILER_LOG_ERROR(LOG_CORE, "eventPoller unset! num: %zu", i);
                 item->eventPollerList[i]->RemoveFileDescriptor(item->eventNotifierList[i]->GetFd());
                 item->eventPollerList[i]->Stop();
                 item->eventPollerList[i]->Finalize();