On Wed, 14 Jan 2026 20:19:52 +0100 Francois Dugast <[email protected]> wrote:
> Reinitialize metadata for large zone device private folios in > zone_device_page_init prior to creating a higher-order zone device > private folio. This step is necessary when the folio’s order changes > dynamically between zone_device_page_init calls to avoid building a > corrupt folio. As part of the metadata reinitialization, the dev_pagemap > must be passed in from the caller because the pgmap stored in the folio > page may have been overwritten with a compound head. Thanks. What are the worst-case userspace-visible effects of the bug?
