Linux Kernel Compaction Sysfs File Leak Vulnerability

A vulnerability in the Linux kernel's handling of sysfs files related to memory compaction has been identified. The issue arises because the compaction sysfs file, created when a node is registered for compaction, is not removed when the node is unregistered. This oversight leads to a leak of the compaction sysfs file.

Impact

The vulnerability causes a memory leak by failing to properly unregister the compaction sysfs file, which can lead to increased memory usage over time.

Remediation

The vulnerability has been addressed by modifying the unregister_node function to properly remove the compaction sysfs file, preventing the leak.