CVE-2024-36908

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.6.37

Description A vulnerability in the Linux kernel has been resolved, related to the blk-iocost module. The issue occurs when the iocg pay debt() function triggers a warning if the active list is empty, which is intended to confirm that the iocg is active when it has debt. However, this warning can be triggered during a blkcg or disk removal, if iocg waitq timer fn() is run at that time. The warning in this situation is meaningless, as the state of the active list is irrelevant when the iocg is being removed. To avoid this warning, a check has been added to see if the iocg was already offlined when removing a blkcg or disk.

Recommendations Update to Linux kernel version 6.6.37 or later to resolve the issue.