syzbot

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BUG: KCSAN: data-race in print_cpu / tick_nohz_idle_got_tick

write to 0xffff888237d1f270 of 1 bytes by task 0 on cpu 1:
 tick_nohz_idle_got_tick+0x5b/0x70 kernel/time/tick-sched.c:1192
 menu_reflect+0x43/0x60 drivers/cpuidle/governors/menu.c:442
 cpuidle_reflect+0x56/0x70 drivers/cpuidle/cpuidle.c:405
 cpuidle_idle_call kernel/sched/idle.c:219 [inline]
 do_idle+0x1ae/0x230 kernel/sched/idle.c:282
 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:379
 start_secondary+0x7c/0x80 arch/x86/kernel/smpboot.c:269
 secondary_startup_64_no_verify+0xf5/0xfb

read to 0xffff888237d1f270 of 1 bytes by task 11625 on cpu 0:
 print_cpu+0x428/0x640 kernel/time/timer_list.c:154
 timer_list_show+0x115/0x180 kernel/time/timer_list.c:291
 seq_read_iter+0x2bc/0x8f0 fs/seq_file.c:230
 proc_reg_read_iter+0x10e/0x180 fs/proc/inode.c:305
 call_read_iter include/linux/fs.h:1862 [inline]
 generic_file_splice_read+0xe3/0x290 fs/splice.c:419
 do_splice_to fs/splice.c:902 [inline]
 splice_direct_to_actor+0x25a/0x5f0 fs/splice.c:973
 do_splice_direct+0x104/0x180 fs/splice.c:1082
 do_sendfile+0x3b8/0x950 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64 fs/read_write.c:1308 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x11 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 11625 Comm: syz-executor.1 Not tainted 6.4.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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