IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
==================================================================
BUG: KASAN: stack-out-of-bounds in notify_die+0x2c2/0x2e0 kernel/notifier.c:539
Write of size 8 at addr ffff8801a9d0f1f8 by task syz-executor0/4504

CPU: 1 PID: 4504 Comm: syz-executor0 Not tainted 4.18.0-rc6-next-20180725+ #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:

The buggy address belongs to the page: