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fix: page_align_up overflow #1078

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fix: page_align_up overflow #1078

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2 changes: 1 addition & 1 deletion kernel/src/libs/align.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -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 {
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