CVE-2023-52934

CVE-2023-52934 refers to a Linux kernel MADV_COLLAPSE issue. A change in MADV_COLLAPSE handling of pmd lookups (replacing a !pmd_present check with pmd_none) aims to distinguish none-pmd cases from absent/bad-pmd cases to prevent misclassifying swap or other entries as huge-pmd mappings. The prov...