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BUG: KCSAN: data-race in ktime_get_ts64 / 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
 should_watch kernel/kcsan/core.c:244 [inline]
 check_access kernel/kcsan/core.c:563 [inline]
 __tsan_read1+0xb0/0x100 kernel/kcsan/core.c:697
 tomoyo_check_acl+0xbe/0x270 security/tomoyo/domain.c:173
 tomoyo_path_number_perm+0x272/0x3c0 security/tomoyo/file.c:733
 tomoyo_file_ioctl+0x2c/0x40 security/tomoyo/tomoyo.c:335
 security_file_ioctl+0x6d/0xa0 security/security.c:1441
 ksys_ioctl+0x5f/0x150 fs/ioctl.c:757
 __do_sys_ioctl fs/ioctl.c:772 [inline]
 __se_sys_ioctl fs/ioctl.c:770 [inline]
 __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:770
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffffff8622f348 of 16 bytes by task 8792 on cpu 1:
 ktime_get_ts64+0x15a/0x2c0 kernel/time/timekeeping.c:893
 posix_get_monotonic_timespec+0x46/0x120 kernel/time/posix-timers.c:198
 __do_sys_clock_gettime kernel/time/posix-timers.c:1091 [inline]
 __se_sys_clock_gettime kernel/time/posix-timers.c:1081 [inline]
 __x64_sys_clock_gettime+0xb3/0x170 kernel/time/posix-timers.c:1081
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8792 Comm: syz-executor.3 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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