[Midnightbsd-cvs] [MidnightBSD/src] b82585: CVE-2020-29568

[Lucas Holt]

  Branch: refs/heads/master
  Home:   https://github.com/MidnightBSD/src
  Commit: b82585860ecf1817d13cb953ccb9376eda564d18
      https://github.com/MidnightBSD/src/commit/b82585860ecf1817d13cb953ccb9376eda564d18
  Author: Lucas Holt <luke at foolishgames.com>
  Date:   2021-02-06 (Sat, 06 Feb 2021)

  Changed paths:
    M sys/dev/xen/balloon/balloon.c
    M sys/dev/xen/blkback/blkback.c
    M sys/dev/xen/control/control.c
    M sys/dev/xen/xenstore/xenstore.c
    M sys/xen/xenbus/xenbus.c
    M sys/xen/xenbus/xenbusb.c
    M sys/xen/xenbus/xenbusvar.h
    M sys/xen/xenstore/xenstorevar.h

  Log Message:
  -----------
  CVE-2020-29568

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.