==================================================================
BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64

write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0:
 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
 find_watchpoint kernel/kcsan/core.c:94 [inline]
 __kcsan_check_watchpoint+0xed/0x180 kernel/kcsan/core.c:322
 __tsan_write4+0x18/0x40 kernel/kcsan/kcsan.c:30
 pagefault_disabled_dec include/linux/uaccess.h:173 [inline]
 pagefault_enable include/linux/uaccess.h:200 [inline]
 __kunmap_atomic include/linux/highmem.h:101 [inline]
 clear_highpage include/linux/highmem.h:215 [inline]
 kernel_init_free_pages mm/page_alloc.c:1124 [inline]
 prep_new_page+0x1b6/0x200 mm/page_alloc.c:2156
 get_page_from_freelist+0x1e18/0x2300 mm/page_alloc.c:3680
 __alloc_pages_nodemask+0x255/0x4d0 mm/page_alloc.c:4714
 alloc_pages_vma+0x15b/0x2b0 mm/mempolicy.c:2116
 alloc_zeroed_user_highpage_movable include/linux/highmem.h:208 [inline]
 do_anonymous_page mm/memory.c:2993 [inline]
 handle_pte_fault mm/memory.c:3838 [inline]
 __handle_mm_fault+0x17ac/0x2d00 mm/memory.c:3964

read to 0xffffffff8603f008 of 8 bytes by task 0 on cpu 1:
 tick_do_update_jiffies64+0x2b/0x260 kernel/time/tick-sched.c:62
 tick_nohz_restart_sched_tick kernel/time/tick-sched.c:830 [inline]
 __tick_nohz_idle_restart_tick+0x31/0x1b0 kernel/time/tick-sched.c:1137
 tick_nohz_idle_exit+0x1af/0x1e0 kernel/time/tick-sched.c:1178
 do_idle+0xb0/0x2c0 kernel/sched/idle.c:276
 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354
 start_secondary+0x207/0x260 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================