CVE-2024-52319: mm: use aligned address in clear_gigantic_page()

First published: Sat Jan 11 2025(Updated: )

In the Linux kernel, the following vulnerability has been resolved: mm: use aligned address in clear_gigantic_page() In current kernel, hugetlb_no_page() calls folio_zero_user() with the fault address. Where the fault address may be not aligned with the huge page size. Then, folio_zero_user() may call clear_gigantic_page() with the address, while clear_gigantic_page() requires the address to be huge page size aligned. So, this may cause memory corruption or information leak, addtional, use more obvious naming 'addr_hint' instead of 'addr' for clear_gigantic_page().

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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