CyberRota Analysis
AI-GeneratedThe vulnerability affects the BTRFS file system in the Linux kernel, specifically during data relocation on zoned filesystems, where a deadlock can occur due to the allocation of space reservations. This can lead to system hangs and degraded performance, impacting data integrity and availability. Administrators managing Linux systems utilizing BTRFS should prioritize applying the fix to prevent potential service disruptions.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: zoned: fix deadlock waiting for ticket during data relocation When performing data relocation on a zoned filesystem, BTRFS can deadlock in handle_reserve_tickets(). The relocation process is waiting on a space reservation ticket that can never be fulfilled, because the relocation itself is the operation responsible for freeing up that space. Fix this by introducing a new flush state, BTRFS_RESERVE_FLUSH_ZONED_RELOCATION, specifically for data chunk allocation during zoned relocation. Like BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, this state uses priority_reclaim_data_space() instead of the normal flushing path, which avoids re-entering the relocation code and breaking the deadlock cycle. In btrfs_alloc_data_chunk_ondemand(), select this new flush state when the inode belongs to a data relocation root on a zoned filesystem.