CVE-2024-38384 Information

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.

Reference

https://git.kernel.org/stable/c/714e59b5456e4d6e4295a9968c564abe193f461c https://git.kernel.org/stable/c/785298ab6b802afa75089239266b6bbea590809c https://git.kernel.org/stable/c/d0aac2363549e12cc79b8e285f13d5a9f42fd08e