From b20efd2cc82e524f6d9e010d35afcddf40dc0fc1 Mon Sep 17 00:00:00 2001
From: Marsman1996 <lqliuyuwei@outlook.com>
Date: Wed, 11 Dec 2024 19:19:57 +0800
Subject: [PATCH] fix: `page_align_up` overflow

---
 kernel/src/libs/align.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/src/libs/align.rs b/kernel/src/libs/align.rs
index 4beee8aa2..e3815b324 100644
--- a/kernel/src/libs/align.rs
+++ b/kernel/src/libs/align.rs
@@ -132,7 +132,7 @@ unsafe impl<const NUM: usize> SafeForZero for [u8; NUM] {}
 /// 返回值：对齐后的地址。
 pub const fn page_align_up(addr: usize) -> usize {
     let page_size = MMArch::PAGE_SIZE;
-    return (addr + page_size - 1) & (!(page_size - 1));
+    return addr.wrapping_add(page_size - 1) & (!(page_size - 1));
 }
 
 pub const fn page_align_down(addr: usize) -> usize {