CVE-2026-89967 mm/migrate_device: avoid out-of-bounds writes for compound folios

In the Linux kernel, the following vulnerability has been resolved: mm/migratedevice: avoid out-of-bounds writes for compound folios migratedevicerange and migratedevicepfns clear the entries following a compound folio so that the PFN arrays retain their page-granular representation. If a compoun...