diff --git a/components/dynlink/los_dynlink.c b/components/dynlink/los_dynlink.c
index 145aa0de..70f3d78c 100644
--- a/components/dynlink/los_dynlink.c
+++ b/components/dynlink/los_dynlink.c
@@ -273,7 +273,7 @@ STATIC DynSharedObj *OsLoadInit(const CHAR *fileName, VOID *pool)
         goto ERR2;
     }
 
-    strcpy(dso->buf, fileName);
+    (void)strcpy_s(dso->buf, nameLen + 1, fileName);
     dso->fileName = dso->buf;
     dso->ref = 1;
     dso->pool = (pool ? pool : OS_SYS_MEM_ADDR);
diff --git a/testsuites/sample/cmsis/cmsis_func_test.c b/testsuites/sample/cmsis/cmsis_func_test.c
index 64cfc58e..aa15c496 100644
--- a/testsuites/sample/cmsis/cmsis_func_test.c
+++ b/testsuites/sample/cmsis/cmsis_func_test.c
@@ -90,14 +90,12 @@ EXIT:
 LITE_TEST_CASE(CmsisFuncTestSuite, TestCmsis007, Function | MediumTest | Level1)
 {
     osMessageQueueId_t msgQueueId;
-    osMessageQueueAttr_t attr;
+    osMessageQueueAttr_t attr = {0};
     CHAR staticBuff[STATCI_BUFF_SIZE] = {0};
     CHAR strbuff[] = "hello world";
     CHAR *name = NULL;
     INT32 ret;
 
-    memset(&attr, 0, sizeof(attr));
-
     attr.name = "q1";
     /* dynamic test */
     msgQueueId = osMessageQueueNew(1, strlen(strbuff), &attr);
@@ -184,11 +182,9 @@ static VOID CmsisQueueTestThread2(VOID)
 
 static INT32 ThreadReadWriteTest(VOID)
 {
-    osMessageQueueAttr_t attr;
+    osMessageQueueAttr_t attr = {0};
     INT32 ret;
 
-    memset(&attr, 0, sizeof(attr));
-
     g_msgQueueId1 = osMessageQueueNew(1, strlen(g_strbuff1), NULL);
     ICUNIT_ASSERT_NOT_EQUAL(g_msgQueueId1, NULL, g_msgQueueId1);
 
@@ -243,14 +239,12 @@ LITE_TEST_CASE(CmsisFuncTestSuite, TestCmsis006, Function | MediumTest | Level1)
 LITE_TEST_CASE(CmsisFuncTestSuite, TestCmsis005, Function | MediumTest | Level1)
 {
     osMessageQueueId_t msgQueueId;
-    osMessageQueueAttr_t attr;
+    osMessageQueueAttr_t attr = {0};
     CHAR staticBuff[STATCI_BUFF_SIZE] = {0};
     CHAR strbuff[] = "hello world";
     CHAR data[STATCI_BUFF_SIZE] = {0};
     INT32 ret;
 
-    memset(&attr, 0, sizeof(attr));
-
     ret = osMessageQueuePut(NULL, &strbuff, 0U, 0U);
     ICUNIT_ASSERT_EQUAL(ret, osErrorParameter, ret);
 
@@ -317,14 +311,12 @@ EXIT:
 LITE_TEST_CASE(CmsisFuncTestSuite, TestCmsis004, Function | MediumTest | Level1)
 {
     osMessageQueueId_t msgQueueId;
-    osMessageQueueAttr_t attr;
+    osMessageQueueAttr_t attr = {0};
     CHAR staticBuff[STATCI_BUFF_SIZE] = {0};
     CHAR strbuff[] = "hello world";
     CHAR data[STATCI_BUFF_SIZE] = {0};
     INT32 ret;
 
-    memset(&attr, 0, sizeof(attr));
-
     /* dynamic test */
     msgQueueId = osMessageQueueNew(1, strlen(strbuff), NULL);
     ICUNIT_ASSERT_NOT_EQUAL(msgQueueId, NULL, msgQueueId);
@@ -381,12 +373,10 @@ EXIT:
 LITE_TEST_CASE(CmsisFuncTestSuite, TestCmsis003, Function | MediumTest | Level1)
 {
     osMessageQueueId_t msgQueueId;
-    osMessageQueueAttr_t attr;
+    osMessageQueueAttr_t attr = {0};
     CHAR staticBuff[STATCI_BUFF_SIZE] = {0};
     CHAR strbuff[] = "hello world";
 
-    memset(&attr, 0, sizeof(attr));
-
     /* dynmic test */
     msgQueueId = osMessageQueueNew(0, strlen(strbuff), NULL);
     ICUNIT_ASSERT_EQUAL(msgQueueId, NULL, msgQueueId);
@@ -427,13 +417,11 @@ LITE_TEST_CASE(CmsisFuncTestSuite, TestCmsis003, Function | MediumTest | Level1)
 LITE_TEST_CASE(CmsisFuncTestSuite, TestCmsis002, Function | MediumTest | Level1)
 {
     osMessageQueueId_t msgQueueId;
-    osMessageQueueAttr_t attr;
+    osMessageQueueAttr_t attr = {0};
     CHAR staticBuff[STATCI_BUFF_SIZE] = {0};
     CHAR strbuff[] = "hello world";
     INT32 ret;
 
-    memset(&attr, 0, sizeof(attr));
-
     /* dynamic test */
     msgQueueId = osMessageQueueNew(1, strlen(strbuff), NULL);
     ICUNIT_ASSERT_NOT_EQUAL(msgQueueId, NULL, msgQueueId);
diff --git a/testsuites/sample/kernel/atomic/it_los_atomic_007.c b/testsuites/sample/kernel/atomic/it_los_atomic_007.c
index 24ffd2a7..5a856cf7 100644
--- a/testsuites/sample/kernel/atomic/it_los_atomic_007.c
+++ b/testsuites/sample/kernel/atomic/it_los_atomic_007.c
@@ -55,8 +55,10 @@ static UINT32 TestCase(VOID)
     g_testAtomicID05 = 0;
 
     for (i = 0; i < ATOMIC_MUTI_TASK_NUM; i++) {
-        memset(buf, 0, 10); // max buf size is 10.
-        memset(taskName[i], 0, 20); // max taskName size is 20.
+        ret = memset_s(buf, 10, 0, 10); // max buf size is 10.
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+        ret = memset_s(taskName[i], 20, 0, 20); // max taskName size is 20.
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
 
         task[i].pfnTaskEntry = (TSK_ENTRY_FUNC)TaskF01;
         task[i].pcName       = taskName[i];
diff --git a/testsuites/sample/kernel/atomic/it_los_atomic_008.c b/testsuites/sample/kernel/atomic/it_los_atomic_008.c
index ff463d94..0b84f25d 100644
--- a/testsuites/sample/kernel/atomic/it_los_atomic_008.c
+++ b/testsuites/sample/kernel/atomic/it_los_atomic_008.c
@@ -56,9 +56,10 @@ static UINT32 TestCase(VOID)
     g_testAtomicID05 = 0;
 
     for (i = 0; i < ATOMIC_MUTI_TASK_NUM; i++) {
-        memset(buf, 0, 10); // max buf size is 10.
-        memset(taskName[i], 0, 20); // max taskName size is 20.
-
+        ret = memset_s(buf, 10, 0, 10); // max buf size is 10.
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+        ret = memset_s(taskName[i], 20, 0, 20); // max taskName size is 20.
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
         task[i].pfnTaskEntry = (TSK_ENTRY_FUNC)TaskF01;
         task[i].pcName       = taskName[i];
         task[i].uwStackSize  = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;
diff --git a/testsuites/sample/kernel/atomic/it_los_atomic_009.c b/testsuites/sample/kernel/atomic/it_los_atomic_009.c
index 01620e2e..5705d570 100644
--- a/testsuites/sample/kernel/atomic/it_los_atomic_009.c
+++ b/testsuites/sample/kernel/atomic/it_los_atomic_009.c
@@ -71,8 +71,10 @@ static UINT32 TestCase(VOID)
     }
 
     for (i = 0; i < uLoop; i++) {
-        memset(buf, 0, 10); // max buf size is 10.
-        memset(taskName[i], 0, 20); // max taskName size is 20.
+        ret = memset_s(buf, 10, 0, 10); // max buf size is 10.
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
+        ret = memset_s(taskName[i], 20, 0, 20); // max taskName size is 20.
+        ICUNIT_ASSERT_EQUAL(ret, 0, ret);
 
         if (i % 2 == 0) { // 2 is index.
             uCount++;
diff --git a/testsuites/sample/kernel/lms/It_los_lms_018.c b/testsuites/sample/kernel/lms/It_los_lms_018.c
index 34976f3b..b078ec4a 100644
--- a/testsuites/sample/kernel/lms/It_los_lms_018.c
+++ b/testsuites/sample/kernel/lms/It_los_lms_018.c
@@ -40,7 +40,7 @@ static UINT32 TestCase(VOID)
     src = LOS_MemAlloc(m_aucSysMem0, 9);
     ICUNIT_ASSERT_NOT_EQUAL(src, NULL, src);
 
-    (VOID)memset(src, 0, 9);
+    (void)memset_s(src, 9, 0, 9);
     src[0] = 49;
     src[1] = 50;
     src[2] = 51;
diff --git a/testsuites/sample/kernel/lms/It_los_lms_019.c b/testsuites/sample/kernel/lms/It_los_lms_019.c
index 6bc98370..9e6ff243 100644
--- a/testsuites/sample/kernel/lms/It_los_lms_019.c
+++ b/testsuites/sample/kernel/lms/It_los_lms_019.c
@@ -40,7 +40,7 @@ static UINT32 TestCase(VOID)
     src = LOS_MemAlloc(m_aucSysMem0, 9);
     ICUNIT_ASSERT_NOT_EQUAL(src, NULL, src);
 
-    (VOID)memset(src, 0, 9);
+    (void)memset_s(src, 9, 0, 9);
     src[0] = 49;
     src[1] = 50;
     src[2] = 51;