Fix remap bug: require present before remapping.

2023-06-21 12:58:39 +02:00
parent eaab222011
commit 0aa7fea250
1 changed files with 1 additions and 0 deletions
@@ -70,6 +70,7 @@ impl<A: Arch, F: FrameAllocator> PageMapper<A, F> {
    pub unsafe fn remap(&mut self, virt: VirtualAddress, flags: PageFlags<A>) -> Option<PageFlush<A>> {
        self.visit(virt, |p1, i| {
            let mut entry = p1.entry(i)?;
+            entry.address().ok()?;
            entry.set_flags(flags);
            p1.set_entry(i, entry);
            Some(PageFlush::new(virt))