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Fix integer overflow caused by page align

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This commit is contained in:
Marsman1996
2024-08-26 14:33:49 +08:00
committed by Tate, Hongliang Tian
parent 0a8ad6971a
commit e184094648
4 changed files with 10 additions and 1 deletions
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3
kernel/src/syscall/mprotect.rs
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@ -22,6 +22,9 @@ pub fn sys_mprotect(addr: Vaddr, len: usize, perms: u64, ctx: &Context) -> Resul
if len == 0 {
return Ok(SyscallReturn::Return(0));
}
if len > usize::MAX - PAGE_SIZE + 1 {
return_errno_with_message!(Errno::ENOMEM, "len align overflow");
}
let len = len.align_up(PAGE_SIZE);
let end = addr.checked_add(len).ok_or(Error::with_message(