On Mon, 2024-07-01 at 15:43 +0300, Kirill A. Shutemov wrote: > Calculation of 'next' virtual address doesn't protect against wrapping > to zero. It can result in page table corruption and hang. The > problematic case is possible if user sets high x86_mapping_info::offset. > > Replace manual 'next' calculation with p?d_addr_and() which handles p?d_addr_and() -> p?d_addr_end(). > wrapping correctly. > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Reviewed-by: Kai Huang <kai.huang@xxxxxxxxx>
