IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready
==================================================================
BUG: KASAN: alloca-out-of-bounds in tick_sched_handle+0x16d/0x180 kernel/time/tick-sched.c:171
Read of size 8 at addr ffff8801b21df300 by task ip/5135

CPU: 0 PID: 5135 Comm: ip Not tainted 4.16.0+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b9/0x29f lib/dump_stack.c:53
 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+0x16d/0x180 kernel/time/tick-sched.c:171
 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1179
 __run_hrtimer kernel/time/hrtimer.c:1337 [inline]
 __hrtimer_run_queues+0x3e3/0x10a0 kernel/time/hrtimer.c:1399
 hrtimer_interrupt+0x286/0x650 kernel/time/hrtimer.c:1457
 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:__asan_allocas_unpoison+0xb/0x20 mm/kasan/kasan.c:770
RSP: 0018:ffff8801b21df328 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13
RAX: ffff8801d0bfe580 RBX: 0000000000000000 RCX: ffffffff85c09fdf
RDX: 0000000000000000 RSI: ffff8801b21df338 RDI: ffff8801b21df2c0
RBP: ffff8801b21df768 R08: ffff8801d0bfe580 R09: ffffed003643be5d
R10: ffffed003643be95 R11: ffff8801b21df4af R12: ffff8801b21df740
R13: ffff8801c3f57a00 R14: 0000000000000000 R15: 00000000ffffffed
 rtnetlink_rcv_msg+0x466/0xc10 net/core/rtnetlink.c:4646
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2446
 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+0x9d8/0xf80 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:629 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:639
 __sys_sendto+0x3d7/0x670 net/socket.c:1789
 SYSC_sendto net/socket.c:1801 [inline]
 SyS_sendto+0x40/0x60 net/socket.c:1797
 do_syscall_64+0x29e/0x9d0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7faeba0e2282
RSP: 002b:00007ffd1177b030 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007faeba0e2282
RDX: 0000000000000020 RSI: 00007ffd1177b070 RDI: 0000000000000013
RBP: 00007ffd1177bf5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007ffd1177b7f0 R14: 00007ffd1177b7f8 R15: 0000000000000000

The buggy address belongs to the page:
page:ffffea0006c877c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x2fffc0000000000()
raw: 02fffc0000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: 0000000000000000 ffffea0006c80101 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801b21df200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801b21df280: 00 00 00 00 00 00 00 00 ca ca ca ca 00 cb cb cb
>ffff8801b21df300: cb cb cb cb 00 00 00 00 00 00 00 00 00 00 00 00
                   ^
 ffff8801b21df380: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
 ffff8801b21df400: 00 f2 f2 f2 f2 f2 f2 f2 00 00 f2 f2 f2 f2 f2 f2
==================================================================