Disable lua bytecode loading

crawl · Feb 13, 2020 · 768f60d · 768f60d
1 parent e281fa6
commit 768f60d
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/crawl-ref/source/clua.cc b/crawl-ref/source/clua.cc
@@ -776,10 +776,27 @@ void CLua::init_lua()
     setregistry("__clua");
 }
 
+static int lua_loadstring(lua_State *ls)
+{
+    const auto lua = luaL_checkstring(ls, 1);
+    if (lua[0] == 0x1b)
+        abort();
+    lua_settop(ls, 0);
+    if (luaL_loadstring(ls, lua))
+    {
+        lua_pushnil(ls);
+        lua_insert(ls, 1);
+    }
+    return lua_gettop(ls);
+}
+
 void CLua::init_libraries()
 {
     lua_stack_cleaner clean(state());
 
+    lua_pushcfunction(_state, lua_loadstring);
+    lua_setglobal(_state, "loadstring");
+
     // Open Crawl bindings
     cluaopen_kills(_state);
     cluaopen_you(_state);