Red Hat: CVE-2024-38384: kernel: blk-cgroup: fix list corruption from reorder of WRITE ->lqueued (Multiple Advisories)

Red Hat: CVE-2024-38384: kernel: blk-cgroup: fix list corruption from reorder of WRITE ->lqueued (Multiple Advisories)

Severity

4

CVSS

(AV:L/AC:L/Au:M/C:N/I:N/A:C)

Published

06/24/2024

Created

09/14/2024

Added

09/13/2024

Modified

02/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix list corruption from reorder of WRITE ->lqueued __blkcg_rstat_flush() can be run anytime, especially when blk_cgroup_bio_start is being executed. If WRITE of `->lqueued` is re-ordered with READ of 'bisc->lnode.next' in the loop of __blkcg_rstat_flush(), `next_bisc` can be assigned with one stat instance being added in blk_cgroup_bio_start(), then the local list in __blkcg_rstat_flush() could be corrupted. Fix the issue by adding one barrier.

Solution(s)

• redhat-upgrade-kernel
• redhat-upgrade-kernel-rt

References

• CVE-2024-38384
• RHSA-2024:10771
• RHSA-2024:5066
• RHSA-2024:5067