CVE-2025-39779

In the Linux kernel, the following vulnerability has been resolved: btrfs: subpage: keep TOWRITE tag until folio is cleaned btrfssubpagesetwriteback calls foliostartwriteback the first time a folio is written back, and it also clears the PAGECACHETAGTOWRITE tag even if there are still dirty block...

CVE-2025-39779

CVE-2025-39779 affects the Linux kernel’s btrfs subpage handling. The bug arises when btrfs_subpage_set_writeback() clears PAGECACHE_TAG_TOWRITE on a folio that still has dirty pages, breaking writeback ordering guarantees (e.g., btrfs_wait_ordered_extents()) and causing potential failures in zon...

CVE-2025-39779 btrfs: subpage: keep TOWRITE tag until folio is cleaned

In the Linux kernel, the following vulnerability has been resolved: btrfs: subpage: keep TOWRITE tag until folio is cleaned btrfssubpagesetwriteback calls foliostartwriteback the first time a folio is written back, and it also clears the PAGECACHETAGTOWRITE tag even if there are still dirty block...