diff --git a/devicemanager.gni b/devicemanager.gni
index 5b37dbc852e7081d880036baa2e1389103f4e974..fee9560c8149ab41407bb655dddd55a3e4cbe786 100644
--- a/devicemanager.gni
+++ b/devicemanager.gni
@@ -21,7 +21,4 @@ services_path = "${devicemanager_path}/services"
 
 innerkits_path = "${devicemanager_path}/interfaces/inner_kits"
 
-build_flags = [
-  "-Werror",
-  "-Wall",
-]
+build_flags = [ "-Werror" ]
diff --git a/interfaces/inner_kits/native_cpp/BUILD.gn b/interfaces/inner_kits/native_cpp/BUILD.gn
index 275b19bc61615f78413fa8e6d53329f0f4650dab..0c67c13c6baf0c64e495a12ea0a60ae08dd17d7e 100644
--- a/interfaces/inner_kits/native_cpp/BUILD.gn
+++ b/interfaces/inner_kits/native_cpp/BUILD.gn
@@ -97,8 +97,6 @@ if (defined(ohos_lite)) {
       "src/notify/device_manager_notify.cpp",
     ]
 
-    cflags_cc = build_flags
-
     deps = [
       "${utils_path}:devicemanagerutils",
       "//utils/native/base:utils",
diff --git a/interfaces/kits/js/BUILD.gn b/interfaces/kits/js/BUILD.gn
index 5c67772074611715ef11ffe03784a1318d1b537c..d52ac126ed52f68622cd1f3e15eb0de442d61a5d 100644
--- a/interfaces/kits/js/BUILD.gn
+++ b/interfaces/kits/js/BUILD.gn
@@ -41,8 +41,6 @@ ohos_shared_library("devicemanager") {
     "//utils/native/base:utils",
   ]
 
-  cflags_cc = build_flags
-
   defines = [
     "HI_LOG_ENABLE",
     "DH_LOG_TAG=\"devicemanagerkit_js\"",
diff --git a/services/devicemanagerservice/BUILD.gn b/services/devicemanagerservice/BUILD.gn
index cdc51d98361228a4080979c3fa9898fc973eae53..aa7dc489ff6e42a34d19b1d49283d42a6ebab2e6 100644
--- a/services/devicemanagerservice/BUILD.gn
+++ b/services/devicemanagerservice/BUILD.gn
@@ -171,8 +171,6 @@ if (defined(ohos_lite)) {
       "LOG_DOMAIN=0xD004100",
     ]
 
-    cflags_cc = build_flags
-
     external_deps = [
       "appexecfwk_standard:appexecfwk_base",
       "appexecfwk_standard:appexecfwk_core",
diff --git a/services/devicemanagerservice/include/requestauth/request_session.h b/services/devicemanagerservice/include/requestauth/request_session.h
index 22bbbf4515cba44382d958efc850499f53f18b47..aa805d9f95560e79f57247c83ddd9c14c962663b 100644
--- a/services/devicemanagerservice/include/requestauth/request_session.h
+++ b/services/devicemanagerservice/include/requestauth/request_session.h
@@ -57,21 +57,28 @@ private:
     void SyncDmPrivateGroup(std::vector<std::string> &remoteGroupList);
 
 private:
-    int32_t mSessionType_;
-    int32_t mStatus_;
+    enum StatusType : int32_t {
+        STATUS_INIT = 0,
+        STATUS_WAITING_REPLY = 2,
+        STATUS_WATING_SCAN_OR_INPUT = 3,
+        STATUS_WAITING_ADD_GROUP = 4,
+        STATUS_FINISH = 6,
+    };
+    int32_t mSessionType_ {SESSION_TYPE_IS_APP_AUTH};
+    int32_t mStatus_ {StatusType::STATUS_INIT};
     std::string mHostPkgName_;
     std::string mTargetPkgName;
     std::string mToken_;
-    int32_t mPinToken_;
+    int32_t mPinToken_ {MIN_PIN_TOKEN};
     DmDeviceInfo mDevInfo_;
     DmAppImageInfo mImageInfo_;
-    long long mChannelId_;
+    long long mChannelId_ {-1};
     bool mIsChannelOpened_ {false};
     std::string mRemoteDeviceId_;
     std::string mRemoteNetId_;
     std::string mRemoteGroupId_;
     std::string mRemoteGroupName_;
-    int64_t mRequestId_;
+    int64_t mRequestId_ {-1};
     std::shared_ptr<MsgResponseAuth> responseMsgPtr_;
 };
 }
diff --git a/services/devicemanagerservice/src/requestauth/request_session.cpp b/services/devicemanagerservice/src/requestauth/request_session.cpp
index 143b5cb1b12919072c24bc88bd054e0ffd2c0770..5514cce0ca117d0e95c3febcbeaa7cb8f7f3efdf 100644
--- a/services/devicemanagerservice/src/requestauth/request_session.cpp
+++ b/services/devicemanagerservice/src/requestauth/request_session.cpp
@@ -31,14 +31,6 @@
 
 namespace OHOS {
 namespace DistributedHardware {
-enum StatusType : int32_t {
-    STATUS_INIT = 0,
-    STATUS_WAITING_REPLY = 2,
-    STATUS_WATING_SCAN_OR_INPUT = 3,
-    STATUS_WAITING_ADD_GROUP = 4,
-    STATUS_FINISH = 6,
-};
-
 RequestSession::RequestSession(std::string &hostPkgName, const DmDeviceInfo &devReqInfo,
     const DmAppImageInfo &imageInfo, std::string &extrasJson)
 {
@@ -53,16 +45,12 @@ RequestSession::RequestSession(std::string &hostPkgName, const DmDeviceInfo &dev
         return;
     }
     std::string targetPkgName = jsonObject[TARGET_PKG_NAME_KEY];
-    mSessionType_ = SESSION_TYPE_IS_APP_AUTH;
     mDevInfo_ = devReqInfo;
     mImageInfo_ = imageInfo;
     DMLOG(DM_LOG_ERROR, "imageinfo appIcon:%p:%p", mImageInfo_.GetAppIcon(), imageInfo.GetAppIcon());
     mHostPkgName_ = hostPkgName;
     mTargetPkgName = targetPkgName;
-    mStatus_ = StatusType::STATUS_INIT;
     mPinToken_ = IpcServerAdapter::GenRandInt(MIN_PIN_TOKEN, MAX_PIN_TOKEN);
-    mChannelId_ = -1;
-    mRequestId_ = -1;
     char randStr[TOKEN_LEN] = {0};
     bool res = EncryptUtils::MbedtlsGenRandomStr(randStr, sizeof(randStr), false);
     if (res == false) {
diff --git a/services/devicemanagerservice/src/timer/dm_timer.cpp b/services/devicemanagerservice/src/timer/dm_timer.cpp
index 09c7cfecd16d40d41149b5a4e65494eae8a22ce4..8e736945a88d92ece0f0111ed72dd1f6ffe7b5ad 100644
--- a/services/devicemanagerservice/src/timer/dm_timer.cpp
+++ b/services/devicemanagerservice/src/timer/dm_timer.cpp
@@ -17,6 +17,8 @@
 
 #include <thread>
 
+#include "securec.h"
+
 namespace OHOS {
 namespace DistributedHardware {
 namespace {
@@ -25,8 +27,14 @@ const int32_t MILL_SECONDS_PER_SECOND = 1000;
 DmTimer::DmTimer(std::string &name)
 {
     mStatus_ = DmTimerStatus::DM_STATUS_INIT;
-    mTimerName_ = name;
+    mTimeOutSec_ = 0;
+    mHandle_ = nullptr;
+    mHandleData_ = nullptr;
+    (void)memset_s(mTimeFd_, sizeof(mTimeFd_), 0, sizeof(mTimeFd_));
+    (void)memset_s(&mEv_, sizeof(mEv_), 0, sizeof(mEv_));
+    (void)memset_s(mEvents_, sizeof(mEvents_), 0, sizeof(mEvents_));
     mEpFd_ = 0;
+    mTimerName_ = name;
 }
 
 DmTimer::~DmTimer()
diff --git a/utils/BUILD.gn b/utils/BUILD.gn
index 97be1fa253a9718ef655717198c7eb68250eb4c8..368b7775b41f973dc1a4d4eb786832b146c96467 100644
--- a/utils/BUILD.gn
+++ b/utils/BUILD.gn
@@ -106,8 +106,6 @@ if (defined(ohos_lite)) {
       "LOG_DOMAIN=0xD004100",
     ]
 
-    cflags_cc = build_flags
-
     external_deps = [
       "appexecfwk_standard:appexecfwk_base",
       "appexecfwk_standard:appexecfwk_core",