FreeBSD -- Xen guests can triger backend Out Of Memory

ID 5D91370B-61FD-11EB-B87A-901B0EF719AB
Type freebsd
Reporter FreeBSD
Modified 2021-01-29T00:00:00


Problem Description: Some OSes (including Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbound, a guest may be able to trigger a OOM in the backend.