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BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer

read to 0xffffffff85cb2790 of 4 bytes by interrupt on cpu 1:
 tick_sched_do_timer+0x33/0xe0 kernel/time/tick-sched.c:128
 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1292
 __run_hrtimer kernel/time/hrtimer.c:1514 [inline]
 __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1576
 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1638
 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
 arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline]
 __kcsan_setup_watchpoint+0x268/0x4a0 kernel/kcsan/core.c:424
 __tsan_read1 kernel/kcsan/kcsan.c:33 [inline]
 __tsan_read1+0x2c/0x30 kernel/kcsan/kcsan.c:33
 kallsyms_expand_symbol.constprop.0+0x103/0x160 kernel/kallsyms.c:83
 kallsyms_lookup_name+0x7f/0x120 kernel/kallsyms.c:170
 insert_report_filterlist kernel/kcsan/debugfs.c:127 [inline]
 debugfs_write+0x122/0x2a0 kernel/kcsan/debugfs.c:210
 full_proxy_write+0xbd/0x100 fs/debugfs/file.c:225
 __vfs_write+0x67/0xc0 fs/read_write.c:494
 vfs_write fs/read_write.c:558 [inline]
 vfs_write+0x18a/0x390 fs/read_write.c:542

write to 0xffffffff85cb2790 of 4 bytes by task 0 on cpu 0:
 tick_nohz_stop_tick kernel/time/tick-sched.c:760 [inline]
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:952 [inline]
 tick_nohz_idle_stop_tick+0x525/0x670 kernel/time/tick-sched.c:973
 cpuidle_idle_call kernel/sched/idle.c:151 [inline]
 do_idle+0x1a5/0x280 kernel/sched/idle.c:263
 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:355
 rest_init+0xec/0xf6 init/main.c:452
 arch_call_rest_init+0x17/0x37
 start_kernel+0x838/0x85e init/main.c:786
 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:472
 x86_64_start_kernel+0x72/0x76 arch/x86/kernel/head64.c:453
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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