CVE-2023-54019 sched/psi: use kernfs polling functions for PSI trigger polling

In the Linux kernel, the following vulnerability has been resolved: sched/psi: use kernfs polling functions for PSI trigger polling Destroying psi trigger in cgroupfilerelease causes UAF issues when a cgroup is removed from under a polling process. This is happening because cgroup removal causes ...

kernel: sched/psi: Fix use-after-free in ep_remove_wait_queue()

In the Linux kernel, the following vulnerability has been resolved: sched/psi: Fix use-after-free in epremovewaitqueue If a non-root cgroup gets removed when there is a thread that registered trigger and is polling on a pressure file within the cgroup, the polling waitqueue gets freed in the...