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BUG: KCSAN: data-race in get_cpu_iowait_time_us / tick_irq_enter

write to 0xffff888237d1e0a0 of 8 bytes by interrupt on cpu 1:
 update_ts_time_stats kernel/time/tick-sched.c:655 [inline]
 tick_nohz_stop_idle kernel/time/tick-sched.c:665 [inline]
 tick_nohz_irq_enter kernel/time/tick-sched.c:1430 [inline]
 tick_irq_enter+0x138/0x210 kernel/time/tick-sched.c:1456
 common_interrupt+0x8f/0xc0 arch/x86/kernel/irq.c:240
 asm_common_interrupt+0x27/0x40
 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
 acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:554 [inline]
 acpi_idle_enter+0x283/0x310 drivers/acpi/processor_idle.c:691
 cpuidle_enter_state+0x2ee/0x7a0 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x1b2/0x250 kernel/sched/idle.c:303
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 start_secondary+0x78/0x80 arch/x86/kernel/smpboot.c:266
 secondary_startup_64_no_verify+0xcf/0xdb

read to 0xffff888237d1e0a0 of 8 bytes by task 30406 on cpu 0:
 get_cpu_iowait_time_us+0x1a1/0x1d0 kernel/time/tick-sched.c:747
 get_iowait_time fs/proc/stat.c:70 [inline]
 show_stat+0x37f/0xe60 fs/proc/stat.c:135
 seq_read_iter+0x2c3/0x8e0 fs/seq_file.c:230
 proc_reg_read_iter+0xd4/0x170 fs/proc/inode.c:296
 call_read_iter include/linux/fs.h:2046 [inline]
 io_iter_do_read fs/io_uring.c:4253 [inline]
 io_read fs/io_uring.c:4372 [inline]
 io_issue_sqe+0x1f80/0xaa40 fs/io_uring.c:8310
 io_queue_sqe+0x1b/0x160 fs/io_uring.c:8706
 io_req_task_submit+0x8b/0xb0 fs/io_uring.c:3066
 handle_tw_list fs/io_uring.c:2938 [inline]
 tctx_task_work+0x8bc/0xc00 fs/io_uring.c:2967
 task_work_run+0x8e/0x110 kernel/task_work.c:177
 get_signal+0xeca/0x1020 kernel/signal.c:2652
 arch_do_signal_or_restart+0x87/0x2d0 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:166
 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

value changed: 0x000001d5fa7c51d6 -> 0x000001d5fa7c6ee7

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 30406 Comm: syz-executor.1 Tainted: G        W         5.18.0-syzkaller-01444-g0350785b0a09-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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