CVE-2024-42231

In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix calcavailablefreespace for zoned mode calcavailablefreespace returns the total size of metadata or system block groups, which can be allocated from unallocated disk space. The logic is wrong on zoned mode in two...

CVE-2024-42231 btrfs: zoned: fix calc_available_free_space() for zoned mode

In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix calcavailablefreespace for zoned mode calcavailablefreespace returns the total size of metadata or system block groups, which can be allocated from unallocated disk space. The logic is wrong on zoned mode in two...

CVE-2024-42231

CVE-2024-42231 affects the Linux kernel, specifically the btrfs filesystem in zoned mode. The issue is in calc_available_free_space(): the code incorrectly loops zone handling, treating each zone as a single chunk and not permitting partial allocations. This can yield a non-zone-aligned avail val...