CVE-2022-49547

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A deadlock can occur in the Linux kernel when multiple tasks attempt to write to the same file range in a btrfs file system, specifically when the file range covers multiple extents and the available free space is low. This deadlock can happen when one task locks a file range, creates an ordered extent, and then waits for the async data reclaim task to reserve data space, while another task is waiting for the same file range to be unlocked. The async data reclaim task is waiting for the ordered extent to complete, but it cannot complete because the file range is locked by the second task, resulting in a deadlock between the tasks and the async data reclaim task.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.