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Fix integer overflow in handle_page_faults_around

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Marsman1996 2024-09-12 20:15:04 +08:00 committed by Tate, Hongliang Tian
parent b88c490ff7
commit 6fcad6ce14
1 changed files with 1 additions and 1 deletions
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2
kernel/src/vm/vmar/vm_mapping.rs
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@ -305,7 +305,7 @@ impl VmMapping {
let vmo_offset = inner.vmo_offset.unwrap(); let vmo_offset = inner.vmo_offset.unwrap();
let vmo = self.vmo().unwrap(); let vmo = self.vmo().unwrap();
let around_page_addr = page_fault_addr & SURROUNDING_PAGE_ADDR_MASK; let around_page_addr = page_fault_addr & SURROUNDING_PAGE_ADDR_MASK;
let valid_size = min(vmo.size() - vmo_offset, inner.map_size); let valid_size = min(vmo.size().saturating_sub(vmo_offset), inner.map_size);
let start_addr = max(around_page_addr, inner.map_to_addr); let start_addr = max(around_page_addr, inner.map_to_addr);
let end_addr = min( let end_addr = min(