syzbot

==================================================================
BUG: KCSAN: data-race in print_cpu / tick_nohz_idle_enter

write to 0xffff888237d1f668 of 8 bytes by task 0 on cpu 1:
 tick_nohz_start_idle kernel/time/tick-sched.c:687 [inline]
 tick_nohz_idle_enter+0x85/0xd0 kernel/time/tick-sched.c:1175
 do_idle+0x3c/0x230 kernel/sched/idle.c:256
 cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:410
 start_secondary+0x82/0x90 arch/x86/kernel/smpboot.c:336
 secondary_startup_64_no_verify+0x15f/0x16b

read to 0xffff888237d1f668 of 8 bytes by task 31776 on cpu 0:
 print_cpu+0x4c4/0x640 kernel/time/timer_list.c:158
 timer_list_show+0x115/0x180 kernel/time/timer_list.c:291
 seq_read_iter+0x612/0x8f0 fs/seq_file.c:272
 proc_reg_read_iter+0x114/0x180 fs/proc/inode.c:302
 call_read_iter include/linux/fs.h:2079 [inline]
 copy_splice_read+0x39f/0x5d0 fs/splice.c:365
 do_splice_read fs/splice.c:985 [inline]
 splice_direct_to_actor+0x268/0x660 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x3b9/0x960 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
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000008c29236342 -> 0x0000008c2925a868

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 31776 Comm: syz-executor.1 Not tainted 6.8.0-rc5-syzkaller-00002-gfca7526b7d89 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
==================================================================