btrfs: subpage: keep TOWRITE tag until folio is cleaned

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SUSE 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...

AZL-70831 CVE-2025-39779 affecting package kernel 5.15.200.1-1

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...

DEBIAN-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

Summary: CVE-2025-39779 is a Linux kernel vulnerability in btrfs subpage handling. The issue occurs when btrfs_subpage_set_writeback() clears the PAGECACHE_TAG_TOWRITE tag on a folio that still has dirty blocks, breaking WB_SYNC_ALL/ordering guarantees and potentially causing a failure (e.g., an ...

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 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...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in Linux kernel that stems from a btrfs subpage prematurely clearing the TOWRITE tag before cleaning, which could lead to a sort guarantee failu...