Hi, this is a version of commit 86e6ca55b83c ("blk-cgroup: Fix UAF in blkcg_unpin_online()") adapted for porting to the 5.10 LTS tree.
The patch fixes CVE-2024-56672.
Changes with respect to the original commit: - blkcg_unpin_online() is implemented in linux/blk-cgroup.h.
Thanks, Andrea