A flaw was found in the blkgs destruction path in block/blk-cgroup.c in the Linux kernel, leading to a cgroup blkio memory leakage problem. When a cgroup is being destroyed, cgroup_rstat_flush() is only called at css_release_work_fn(), which is called when the blkcg reference count reaches 0. This circular dependency will prevent blkcg and some blkgs from being freed after they are made offline. This issue may allow an attacker with a local access to cause system instability, such as an out of memory error.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2024-01-11T23:30:52.291Z

Updated: 2024-09-16T11:04:13.565Z

Reserved: 2024-01-11T20:41:30.877Z

Link: CVE-2024-0443

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2024-01-12T00:15:45.230

Modified: 2024-05-20T11:15:08.403

Link: CVE-2024-0443

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-12-14T00:00:00Z

Links: CVE-2024-0443 - Bugzilla