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BUG: KCSAN: data-race in print_cpu / tick_nohz_idle_enter

read-write to 0xffff888237d204b8 of 8 bytes by task 0 on cpu 1:
 tick_sched_flag_set kernel/time/tick-sched.c:194 [inline]
 tick_nohz_idle_enter+0x59/0xe0 kernel/time/tick-sched.c:1262
 do_idle+0x3d/0x230 kernel/sched/idle.c:277
 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:430
 start_secondary+0x94/0xa0 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x12c/0x137

read to 0xffff888237d204b8 of 8 bytes by task 8320 on cpu 0:
 print_cpu+0x404/0x670 kernel/time/timer_list.c:156
 timer_list_show+0x115/0x180 kernel/time/timer_list.c:295
 seq_read_iter+0x2d7/0x940 fs/seq_file.c:230
 proc_reg_read_iter+0x11e/0x190 fs/proc/inode.c:299
 copy_splice_read+0x3a4/0x5d0 fs/splice.c:365
 do_splice_read fs/splice.c:985 [inline]
 splice_direct_to_actor+0x26c/0x670 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x3ab/0x950 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1362 [inline]
 __se_sys_sendfile64 fs/read_write.c:1348 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348
 x64_sys_call+0xed5/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:41
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000038 -> 0x000000000000003d

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8320 Comm: syz.4.1571 Not tainted 6.10.0-syzkaller-01155-gd67978318827 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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