CVE-2025-22034 mm/gup: reject FOLL_SPLIT_PMD with hugetlb VMAs

In the Linux kernel, the following vulnerability has been resolved: mm/gup: reject FOLLSPLITPMD with hugetlb VMAs Patch series "mm: fixes for device-exclusive entries hmm", v2. Discussing the PageTail call in makedeviceexclusiverange with Willy, I recently discovered 1 that device-exclusive...