Linux Kernel Copy User Gigantic Page Vulnerability Allows Memory Corruption or Information Leak

A vulnerability in the Linux kernel's handling of huge pages can lead to memory corruption or information leaks. The issue arises in the 'copy_user_gigantic_page()' function, which requires addresses to be aligned with huge page sizes. However, the 'hugetlb_wp()' function currently passes fault addresses that may not be properly aligned. This misalignment can cause 'copy_user_large_folio()' to call 'copy_user_gigantic_page()' with an incorrect address, potentially leading to the mentioned consequences.

Impact

Exploitation of this vulnerability could result in memory corruption or unauthorized information disclosure.