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

read-write to 0xffff888237d1e0f8 of 8 bytes by interrupt on cpu 1:
 tick_nohz_stop_idle kernel/time/tick-sched.c:665 [inline]
 tick_nohz_irq_enter kernel/time/tick-sched.c:1422 [inline]
 tick_irq_enter+0x127/0x210 kernel/time/tick-sched.c:1448
 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:115 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:556 [inline]
 acpi_idle_enter+0x27b/0x300 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
 secondary_startup_64_no_verify+0xc4/0xcb

read to 0xffff888237d1e0f8 of 8 bytes by task 12821 on cpu 0:
 get_cpu_idle_time_us+0x1b8/0x1d0 kernel/time/tick-sched.c:708
 get_idle_time fs/proc/stat.c:54 [inline]
 show_stat+0x97e/0xe60 fs/proc/stat.c:175
 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:2044 [inline]
 io_iter_do_read fs/io_uring.c:3736 [inline]
 io_read fs/io_uring.c:3852 [inline]
 io_issue_sqe+0x1b8a/0x8670 fs/io_uring.c:7122
 __io_queue_sqe fs/io_uring.c:7489 [inline]
 io_queue_sqe fs/io_uring.c:7531 [inline]
 io_submit_sqe+0x663/0x4260 fs/io_uring.c:7736
 io_submit_sqes+0x25e/0x7e0 fs/io_uring.c:7842
 __do_sys_io_uring_enter fs/io_uring.c:10780 [inline]
 __se_sys_io_uring_enter+0x2cb/0xc50 fs/io_uring.c:10706
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:10706
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000001e4c844110 -> 0x0000001e4c856142

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12821 Comm: syz-executor.2 Not tainted 5.18.0-rc2-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================