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: alloca-out-of-bounds in tick_sched_handle+0x16c/0x180 kernel/time/tick-sched.c:173
Read of size 8 at addr ffff88018c737170 by task ip/4715

CPU: 1 PID: 4715 Comm: ip Not tainted 4.16.0+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0xac/0x2f5 mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 tick_sched_handle+0x16c/0x180 kernel/time/tick-sched.c:173
 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1283
 __run_hrtimer kernel/time/hrtimer.c:1386 [inline]
 __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1448
 hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1506
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x15d/0x710 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:862
 </IRQ>
RIP: 0010:kasan_poison_shadow mm/kasan/kasan.c:64 [inline]
RIP: 0010:kasan_unpoison_shadow+0x30/0x50 mm/kasan/kasan.c:69
RSP: 0018:ffff88018c737198 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13
RAX: 1ffff100318e6e39 RBX: ffffed00318e6e39 RCX: ffffffff85c67fd4
RDX: 000000000000000d RSI: 0000000000000000 RDI: ffffed00318e6e2c
RBP: ffff88018c7371a8 R08: ffff8801d79662c0 R09: ffffed00318e6e10
R10: ffffed00318e6e10 R11: 0000000000000003 R12: 0000000000000068
R13: 0000000000000000 R14: ffffffff89592140 R15: 0000000000000000
 __asan_allocas_unpoison+0x16/0x20 mm/kasan/kasan.c:775
 put_net include/net/net_namespace.h:225 [inline]
 rtnl_newlink+0x1094/0x1a40 net/core/rtnetlink.c:3070
 rtnetlink_rcv_msg+0x466/0xc10 net/core/rtnetlink.c:4646
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4664
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:639
 ___sys_sendmsg+0x805/0x940 net/socket.c:2117
 __sys_sendmsg+0x115/0x270 net/socket.c:2155
 SYSC_sendmsg net/socket.c:2164 [inline]
 SyS_sendmsg+0x29/0x30 net/socket.c:2162
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f59759f1320
RSP: 002b:00007ffd12161488 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ffd12165580 RCX: 00007f59759f1320
RDX: 0000000000000000 RSI: 00007ffd121614c0 RDI: 0000000000000013
RBP: 00007ffd121614c0 R08: 0000000000000000 R09: 00007f5975ca00b0
R10: 0000000000000000 R11: 0000000000000246 R12: 000000005ad0ddb5
R13: 0000000000000000 R14: 00000000006395c0 R15: 00007ffd12165d60

The buggy address belongs to the page:
page:ffffea000631cdc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x2fffc0000000000()
raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: ffffea000631cde0 ffffea000631cde0 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88018c737000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88018c737080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88018c737100: 00 00 00 00 00 00 00 00 00 00 00 00 ca ca ca ca
                                                             ^
 ffff88018c737180: 00 cb cb cb cb cb cb cb 00 00 00 00 00 00 00 00
 ffff88018c737200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
==================================================================