diff --git a/kernel/base/core/los_task.c b/kernel/base/core/los_task.c
index 99226353d642a711b6a695da76d28312af46aee9..8c19b900808d43bf9caf751fb8dfd7d509fcd9dc 100644
--- a/kernel/base/core/los_task.c
+++ b/kernel/base/core/los_task.c
@@ -1204,11 +1204,9 @@ LITE_OS_SEC_TEXT_INIT UINT32 LOS_TaskDelete(UINT32 taskID)
         OS_GOTO_ERREND();
     }
 
-    if ((taskCB->taskStatus & OS_TASK_FLAG_SYSTEM_TASK) ||
-        (taskCB->taskStatus & OS_TASK_FLAG_NO_DELETE)) {
+    if (taskCB->taskStatus & (OS_TASK_FLAG_SYSTEM_TASK | OS_TASK_FLAG_NO_DELETE)) {
         SCHEDULER_UNLOCK(intSave);
         OsBackTrace();
-        __asm__ __volatile__("swi 0");
         return LOS_ERRNO_TSK_OPERATE_SYSTEM_TASK;
     }
     processCB = OS_PCB_FROM_PID(taskCB->processID);
diff --git a/kernel/base/vm/los_vm_syscall.c b/kernel/base/vm/los_vm_syscall.c
index 11e8c2fc5d509fb67d0de1b37d04f307dbfb51bb..20e905398a93059948019c98d17be66608f689ad 100644
--- a/kernel/base/vm/los_vm_syscall.c
+++ b/kernel/base/vm/los_vm_syscall.c
@@ -360,7 +360,9 @@ VADDR_T LOS_DoMremap(VADDR_T oldAddress, size_t oldSize, size_t newSize, int fla
             ret = -ENOMEM;
             goto OUT_MREMAP;
         }
-        status = LOS_ArchMmuMove(&space->archMmu, oldAddress, newAddr, newSize >> PAGE_SHIFT, regionOld->regionFlags);
+        status = LOS_ArchMmuMove(&space->archMmu, oldAddress, newAddr,
+                                 ((newSize < regionOld->range.size) ? newSize : regionOld->range.size) >> PAGE_SHIFT,
+                                 regionOld->regionFlags);
         if (status) {
             LOS_RegionFree(space, regionNew);
             ret = -ENOMEM;
@@ -390,8 +392,8 @@ VADDR_T LOS_DoMremap(VADDR_T oldAddress, size_t oldSize, size_t newSize, int fla
             ret = -ENOMEM;
             goto OUT_MREMAP;
         }
-        status = LOS_ArchMmuMove(&space->archMmu, oldAddress, regionNew->range.base, newSize >> PAGE_SHIFT,
-                                 regionOld->regionFlags);
+        status = LOS_ArchMmuMove(&space->archMmu, oldAddress, regionNew->range.base,
+                                 regionOld->range.size >> PAGE_SHIFT, regionOld->regionFlags);
         if (status) {
             LOS_RegionFree(space, regionNew);
             ret = -ENOMEM;