diff --git a/components/shell/src/cmds/shell_shellcmd.c b/components/shell/src/cmds/shell_shellcmd.c
index c9692da9..6412c587 100755
--- a/components/shell/src/cmds/shell_shellcmd.c
+++ b/components/shell/src/cmds/shell_shellcmd.c
@@ -44,7 +44,7 @@ INT32 OsShellCmdHelp(INT32 argc, const CHAR **argv)
     (VOID)argv;
     if (argc > 0) {
         PRINTK("\nUsage: help\n");
-        return OS_ERROR;
+        return (INT32)OS_ERROR;
     }
 
     PRINTK("*******************shell commands:*************************\n");
diff --git a/components/shell/src/cmds/task_shellcmd.c b/components/shell/src/cmds/task_shellcmd.c
index 1fd36aa6..92b3b190 100755
--- a/components/shell/src/cmds/task_shellcmd.c
+++ b/components/shell/src/cmds/task_shellcmd.c
@@ -52,7 +52,7 @@ INT32 OsShellCmdDumpTask(INT32 argc, const CHAR **argv)
         return OsShellCmdTskInfoGet((UINT32)taskId);
     } else {
         PRINTK("\nUsage: task\n");
-        return OS_ERROR;
+        return (INT32)OS_ERROR;
     }
 }
 
diff --git a/components/shell/src/cmds/vfs_shellcmd.c b/components/shell/src/cmds/vfs_shellcmd.c
index d6b19320..fe9efca8 100755
--- a/components/shell/src/cmds/vfs_shellcmd.c
+++ b/components/shell/src/cmds/vfs_shellcmd.c
@@ -386,7 +386,7 @@ STATIC INT32 OsShellCmdDoCp(const CHAR *srcFilePath, const CHAR *dstFileName)
     CHAR *dstFilePath = NULL;
     CHAR *buf = NULL;
     const CHAR *filename = NULL;
-    size_t rdSize, wrSize;
+    ssize_t rdSize, wrSize;
     INT32 srcFd = -1;
     INT32 dstFd = -1;
     struct stat statBuf;
@@ -646,7 +646,7 @@ STATIC INT32 OsWildcardDeleteFileOrDir(const CHAR *fullpath, wildcard_type mark)
             ret = rmdir(fullpath);
             break;
         default:
-            return VFS_ERROR;
+            return (INT32)VFS_ERROR;
     }
     if (ret == -1) {
         PRINTK("%s  ", fullpath);
@@ -787,7 +787,7 @@ STATIC INT32 OsWildcardExtractDirectory(CHAR *fullpath, VOID *dst, wildcard_type
     return ret;
 closedir_out:
     (VOID)closedir(d);
-    return VFS_ERROR;
+    return (INT32)VFS_ERROR;
 }
 
 INT32 OsShellCmdCp(INT32 argc, const CHAR **argv)
@@ -873,7 +873,7 @@ errout_with_path:
     free(drcFullPath);
 errout_with_srcpath:
     free(srcFullPath);
-    return VFS_ERROR;
+    return (INT32)VFS_ERROR;
 }
 
 STATIC INLINE VOID PrintRmUsage(VOID)
diff --git a/kal/posix/src/pthread.c b/kal/posix/src/pthread.c
index 364f7ab6..b583be5f 100644
--- a/kal/posix/src/pthread.c
+++ b/kal/posix/src/pthread.c
@@ -38,6 +38,8 @@
 #include "los_config.h"
 #include "los_task.h"
 
+#define PTHREAD_DEFAULT_NAME     "pthread"
+#define PTHREAD_DEFAULT_NAME_LEN 8
 #define PTHREAD_NAMELEN 16
 #define PTHREAD_KEY_UNUSED 0
 #define PTHREAD_KEY_USED   1
@@ -113,6 +115,12 @@ static int PthreadCreateAttrInit(const pthread_attr_t *attr, void *(*startRoutin
         return ENOMEM;
     }
 
+    errno_t error = memcpy_s(pthreadData->name, PTHREAD_NAMELEN, PTHREAD_DEFAULT_NAME, PTHREAD_DEFAULT_NAME_LEN);
+    if (error != EOK) {
+        free(pthreadData);
+        return error;
+    }
+
     pthreadData->startRoutine   = startRoutine;
     pthreadData->param          = arg;
     pthreadData->key            = NULL;
@@ -142,9 +150,6 @@ int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
         return ret;
     }
 
-    /* set pthread default name */
-    (void)sprintf_s(taskInitParam.pcName, PTHREAD_NAMELEN, "pthread%u", taskID);
-
     if (LOS_TaskCreateOnly(&taskID, &taskInitParam) != LOS_OK) {
         free((VOID *)(UINTPTR)taskInitParam.uwArg);
         return EINVAL;
@@ -258,9 +263,9 @@ void pthread_exit(void *retVal)
 
     intSave = LOS_IntLock();
     LOS_ListDelete(&pthreadData->threadList);
+    tcb->taskName = PTHREAD_DEFAULT_NAME;
     LOS_IntRestore(intSave);
     free(pthreadData);
-
     (void)LOS_TaskDelete(tcb->taskID);
 }
 
@@ -279,6 +284,11 @@ int pthread_setname_np(pthread_t thread, const char *name)
 
     taskCB = OS_TCB_FROM_TID((UINT32)thread);
     intSave = LOS_IntLock();
+    if (taskCB->taskStatus & OS_TASK_STATUS_EXIT) {
+        LOS_IntRestore(intSave);
+        return EINVAL;
+    }
+
     if (taskCB->taskEntry == PthreadEntry) {
         (void)strcpy_s(taskName, PTHREAD_NAMELEN, name);
     } else {