btrfs: adjust subpage bit start based on sectorsize

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AZL-62654 CVE-2025-37931 affecting package kernel for versions less than 6.6.112.1-1

In the Linux kernel, the following vulnerability has been resolved: btrfs: adjust subpage bit start based on sectorsize When running machines with 64k page size and a 16k nodesize we started seeing tree log corruption in production. This turned out to be because we were not writing out dirty bloc...

UBUNTU-CVE-2025-37931

In the Linux kernel, the following vulnerability has been resolved: btrfs: adjust subpage bit start based on sectorsize When running machines with 64k page size and a 16k nodesize we started seeing tree log corruption in production. This turned out to be because we were not writing out dirty bloc...

CVE-2025-37931 btrfs: adjust subpage bit start based on sectorsize

In the Linux kernel, the following vulnerability has been resolved: btrfs: adjust subpage bit start based on sectorsize When running machines with 64k page size and a 16k nodesize we started seeing tree log corruption in production. This turned out to be because we were not writing out dirty bloc...

CVE-2025-37931

CVE-2025-37931 affects the Linux kernel with a Btrfs bitmap addressing flaw that can cause metadata/write-out corruption in certain configurations. The root cause: when writing a dirty subpage EB, the bitmap is indexed by sectors instead of nodes, so for 64k pagesize, 16k nodesize, and 4k sectors...