feat: created initial stack smash protector

kernel/command.c

@@ -54,6 +54,8 @@ void explode(const char *args);
 
 void exec_self_test(const char *args);
 
+void smash(const char *args);
+
 #endif
 
 cmd_handler cmd_handlers[] = {
@@ -65,10 +67,16 @@ cmd_handler cmd_handlers[] = {
         {"explode", explode},
 #ifdef ENABLE_SELF_TEST
         {"self-test", exec_self_test},
+        {"smash", smash},
 #endif
         {NULL, NULL},
 };
 
+void smash(const char* args) {
+    char data[16];
+    memset(data, 'A', 32);
+}
+
 void exec_self_test(const char *args) {
     self_test();
 }