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.Referenceshttps://usn.ubuntu.com/3821-1/https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=5f936e19cc0ef97dbe3a56e9498922ad5ba1edefhttps://bugzilla.kernel.org/show_bug.cgi?id=200303https://usn.ubuntu.com/3821-2/https://lists.debian.org/debian-lts-announce/2019/03/msg00017.htmlhttp://www.securityfocus.com/bid/104671https://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlhttps://lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlhttps://access.redhat.com/errata/RHSA-2019:0831https://access.redhat.com/errata/RHSA-2019:2043https://access.redhat.com/errata/RHSA-2019:2029https://usn.ubuntu.com/4094-1/https://usn.ubuntu.com/4118-1/
