syzbot

==================================================================
BUG: KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick

write to 0xffffffff85ece2f0 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick+0xa0/0x400 kernel/time/tick-sched.c:888
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1109 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1130
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x195/0x250 kernel/sched/idle.c:303
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 start_secondary+0x78/0x80 arch/x86/kernel/smpboot.c:266
 secondary_startup_64_no_verify+0xcf/0xdb

read to 0xffffffff85ece2f0 of 4 bytes by task 0 on cpu 0:
 tick_nohz_next_event+0x1ee/0x2c0 kernel/time/tick-sched.c:853
 tick_nohz_get_sleep_length+0x15b/0x250 kernel/time/tick-sched.c:1239
 menu_select+0x347/0x1010 drivers/cpuidle/governors/menu.c:283
 cpuidle_select+0x3d/0x50 drivers/cpuidle/cpuidle.c:322
 cpuidle_idle_call kernel/sched/idle.c:229 [inline]
 do_idle+0x17e/0x250 kernel/sched/idle.c:303
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 rest_init+0xe8/0xf0 init/main.c:726
 start_kernel+0x0/0x656 init/main.c:882
 start_kernel+0x5d1/0x656 init/main.c:1137
 secondary_startup_64_no_verify+0xcf/0xdb

value changed: 0x00000001 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.18.0-syzkaller-07496-gd7227785e384-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================