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BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64

write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1:
 tick_do_update_jiffies64+0x105/0x260 kernel/time/tick-sched.c:73
 tick_sched_do_timer+0xd4/0xe0 kernel/time/tick-sched.c:138
 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 __read_once_size include/linux/compiler.h:227 [inline]
 arch_atomic64_read arch/x86/include/asm/atomic64_64.h:22 [inline]
 atomic64_read include/asm-generic/atomic-instrumented.h:925 [inline]
 atomic_long_read include/asm-generic/atomic-long.h:28 [inline]
 find_watchpoint kernel/kcsan/core.c:85 [inline]
 __kcsan_check_watchpoint+0xbb/0x180 kernel/kcsan/core.c:322
 __tsan_read4+0x15/0x30 kernel/kcsan/kcsan.c:30
 arch_atomic_read arch/x86/include/asm/atomic.h:31 [inline]
 atomic_read include/asm-generic/atomic-instrumented.h:29 [inline]
 rt_genid_ipv4 include/net/net_namespace.h:419 [inline]
 rt_is_expired net/ipv4/route.c:422 [inline]
 ipv4_dst_check+0xa8/0xf0 net/ipv4/route.c:1190
 dst_check include/net/dst.h:448 [inline]
 tcp_v4_early_demux+0x32a/0x400 net/ipv4/tcp_ipv4.c:1617
 ip_rcv_finish_core.isra.0+0x2f1/0xaf0 net/ipv4/ip_input.c:324
 ip_rcv_finish+0xe5/0x160 net/ipv4/ip_input.c:411
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ip_rcv+0x18f/0x1a0 net/ipv4/ip_input.c:523

read to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0:
 tick_do_update_jiffies64+0x2b/0x260 kernel/time/tick-sched.c:62
 tick_sched_do_timer+0xd4/0xe0 kernel/time/tick-sched.c:138
 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 is_atomic kernel/kcsan/core.c:165 [inline]
 should_watch kernel/kcsan/core.c:194 [inline]
 __kcsan_setup_watchpoint+0x3c/0x510 kernel/kcsan/core.c:363
 __tsan_read4 kernel/kcsan/kcsan.c:30 [inline]
 __tsan_read4+0x2c/0x30 kernel/kcsan/kcsan.c:30
 timekeeping_delta_to_ns kernel/time/timekeeping.c:364 [inline]
 timekeeping_get_ns kernel/time/timekeeping.c:375 [inline]
 ktime_get+0x12f/0x200 kernel/time/timekeeping.c:759
 ktime_get_ns include/linux/timekeeping.h:154 [inline]
 tcp_clock_ns include/net/tcp.h:736 [inline]
 tcp_mstamp_refresh+0x1d/0x70 net/ipv4/tcp_output.c:54
 tcp_rcv_space_adjust+0x4f/0x4c0 net/ipv4/tcp_input.c:609
 tcp_recvmsg+0xdaa/0x1a30 net/ipv4/tcp.c:2145

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7278 Comm: syz-fuzzer Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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