The alarm_timer_nsleep function in kernel/time/alarmtimer.c in the Linux kernel through 4.17.3 has an integer overflow via a large relative timeout because ktime_add_safe is not used.
www.securityfocus.com/bid/104671
access.redhat.com/errata/RHSA-2019:0831
access.redhat.com/errata/RHSA-2019:2029
access.redhat.com/errata/RHSA-2019:2043
bugzilla.kernel.org/show_bug.cgi?id=200303
git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=5f936e19cc0ef97dbe3a56e9498922ad5ba1edef
lists.debian.org/debian-lts-announce/2019/03/msg00017.html
lists.debian.org/debian-lts-announce/2019/03/msg00034.html
lists.debian.org/debian-lts-announce/2019/04/msg00004.html
usn.ubuntu.com/3821-1/
usn.ubuntu.com/3821-2/
usn.ubuntu.com/4094-1/
usn.ubuntu.com/4118-1/