CVE-2025-37818 LoongArch: Return NULL from huge_pte_offset() for invalid PMD

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Return NULL from hugepteoffset for invalid PMD LoongArch's hugepteoffset currently returns a pointer to a PMD slot even if the underlying entry points to invalidptetable indicating no mapping. Callers like...

CVE-2025-37818

LoongArch Linux kernel vulnerability CVE-2025-37818: the issue originates from huge_pte_offset() returning a PMD slot pointer even when the underlying pmd points to an invalid_pte_table, which could be misinterpreted as a swap entry by generic is_swap_pte() and lead to a crash in pfn_swap_entry_t...