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BUG: KCSAN: data-race in ktime_get / timekeeping_advance

write to 0xffffffff8622f2c8 of 280 bytes by interrupt on cpu 0:
 timekeeping_advance+0x88e/0xd80 include/linux/string.h:381
 update_wall_time+0x19/0x20 kernel/time/timekeeping.c:2137
 tick_do_update_jiffies64+0x1ef/0x2b0 kernel/time/tick-sched.c:98
 tick_sched_do_timer+0xd4/0xe0 kernel/time/tick-sched.c:142
 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1307
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x274/0x5f0 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline]
 smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1144
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829

read to 0xffffffff8622f2e8 of 8 bytes by interrupt on cpu 1:
 timekeeping_delta_to_ns kernel/time/timekeeping.c:363 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:375 [inline]
 ktime_get+0x11c/0x210 kernel/time/timekeeping.c:759
 ktime_get_ns include/linux/timekeeping.h:154 [inline]
 tcp_clock_ns include/net/tcp.h:762 [inline]
 tcp_mstamp_refresh+0x1d/0x70 net/ipv4/tcp_output.c:55
 tcp_rcv_established+0x7c/0xf50 net/ipv4/tcp_input.c:5573
 tcp_v4_do_rcv+0x3b5/0x520 net/ipv4/tcp_ipv4.c:1619
 tcp_v4_rcv+0x1c30/0x1e20 net/ipv4/tcp_ipv4.c:2001
 ip_protocol_deliver_rcu+0x4d/0x420 net/ipv4/ip_input.c:204
 ip_local_deliver_finish+0x110/0x140 net/ipv4/ip_input.c:231
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 ip_local_deliver+0x133/0x210 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:442 [inline]
 ip_sublist_rcv_finish+0xf8/0x140 net/ipv4/ip_input.c:549
 ip_list_rcv_finish net/ipv4/ip_input.c:599 [inline]
 ip_sublist_rcv+0x418/0x550 net/ipv4/ip_input.c:607
 ip_list_rcv+0x2f5/0x322 net/ipv4/ip_input.c:642
 __netif_receive_skb_list_ptype net/core/dev.c:5241 [inline]
 __netif_receive_skb_list_ptype net/core/dev.c:5230 [inline]
 __netif_receive_skb_list_core+0x350/0x5c0 net/core/dev.c:5289
 __netif_receive_skb_list net/core/dev.c:5341 [inline]
 netif_receive_skb_list_internal+0x5d8/0x830 net/core/dev.c:5436
 gro_normal_list.part.0+0x3a/0xb0 net/core/dev.c:5547
 gro_normal_list net/core/dev.c:5560 [inline]
 gro_normal_one+0x162/0x170 net/core/dev.c:5559
 napi_skb_finish net/core/dev.c:5887 [inline]
 napi_gro_receive+0x288/0x300 net/core/dev.c:5919
 receive_buf+0x284/0x30d0 drivers/net/virtio_net.c:1061
 virtnet_receive drivers/net/virtio_net.c:1323 [inline]
 virtnet_poll+0x436/0x7d0 drivers/net/virtio_net.c:1428
 napi_poll net/core/dev.c:6582 [inline]
 net_rx_action+0x3ae/0xa90 net/core/dev.c:6650
 __do_softirq+0x115/0x33f kernel/softirq.c:292
 run_ksoftirqd+0x46/0x60 kernel/softirq.c:603
 smpboot_thread_fn+0x37d/0x4a0 kernel/smpboot.c:165
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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