==================================================================
BUG: KCSAN: data-race in get_cpu_iowait_time_us / tick_irq_enter

write to 0xffff888237c1df28 of 8 bytes by interrupt on cpu 0:
 update_ts_time_stats kernel/time/tick-sched.c:638 [inline]
 tick_nohz_stop_idle kernel/time/tick-sched.c:648 [inline]
 tick_nohz_irq_enter kernel/time/tick-sched.c:1377 [inline]
 tick_irq_enter+0x15c/0x240 kernel/time/tick-sched.c:1403
 sysvec_apic_timer_interrupt+0x80/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 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:109 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:553 [inline]
 acpi_idle_enter+0x282/0x300 drivers/acpi/processor_idle.c:688
 cpuidle_enter_state+0x2b4/0x7d0 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:158 [inline]
 cpuidle_idle_call kernel/sched/idle.c:239 [inline]
 do_idle+0x1b2/0x250 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 rest_init+0xfa/0x100 init/main.c:725
 arch_call_rest_init+0xa/0xb
 start_kernel+0x5e4/0x669 init/main.c:1135
 secondary_startup_64_no_verify+0xb1/0xbb

read to 0xffff888237c1df28 of 8 bytes by task 14677 on cpu 1:
 get_cpu_iowait_time_us+0x1c6/0x1f0 kernel/time/tick-sched.c:730
 get_iowait_time fs/proc/stat.c:70 [inline]
 show_stat+0x374/0xdd0 fs/proc/stat.c:135
 seq_read_iter+0x2e1/0x930 fs/seq_file.c:230
 proc_reg_read_iter+0xd6/0x170 fs/proc/inode.c:296
 call_read_iter include/linux/fs.h:2156 [inline]
 io_iter_do_read fs/io_uring.c:3501 [inline]
 io_read fs/io_uring.c:3558 [inline]
 io_issue_sqe+0xbee/0x55e0 fs/io_uring.c:6671
 __io_queue_sqe+0x20/0x440 fs/io_uring.c:7018
 io_queue_sqe fs/io_uring.c:7060 [inline]
 io_submit_sqe+0x77a/0x47d3 fs/io_uring.c:7263
 io_submit_sqes+0x25d/0x670 fs/io_uring.c:7369
 __do_sys_io_uring_enter fs/io_uring.c:10072 [inline]
 __se_sys_io_uring_enter+0x212/0xb00 fs/io_uring.c:10014
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:10014
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000019ea87236db -> 0x0000019ea87445e1

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 14677 Comm: syz-executor.4 Not tainted 5.16.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================