CVE-2023-52940

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> mm: multi-gen LRU: fix crash during cgroup migration<br /> <br /> lru_gen_migrate_mm() assumes lru_gen_add_mm() runs prior to itself. This<br /> isn&amp;#39;t true for the following scenario:<br /> <br /> CPU 1 CPU 2<br /> <br /> clone()<br /> cgroup_can_fork()<br /> cgroup_procs_write()<br /> cgroup_post_fork()<br /> task_lock()<br /> lru_gen_migrate_mm()<br /> task_unlock()<br /> task_lock()<br /> lru_gen_add_mm()<br /> task_unlock()<br /> <br /> And when the above happens, kernel crashes because of linked list<br /> corruption (mm_struct-&gt;lru_gen.list).