syzbot

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BUG: KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick

write to 0xffffffff85ed51b0 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick+0xa0/0x400 kernel/time/tick-sched.c:887
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1108 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1129
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x18a/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:264
 secondary_startup_64_no_verify+0xcf/0xdb

read to 0xffffffff85ed51b0 of 4 bytes by task 0 on cpu 0:
 tick_nohz_next_event+0x1ee/0x2c0 kernel/time/tick-sched.c:852
 tick_nohz_get_sleep_length+0x15b/0x250 kernel/time/tick-sched.c:1238
 menu_select+0x347/0x1010 drivers/cpuidle/governors/menu.c:283
 cpuidle_select+0x3d/0x50 drivers/cpuidle/cpuidle.c:327
 cpuidle_idle_call kernel/sched/idle.c:229 [inline]
 do_idle+0x173/0x250 kernel/sched/idle.c:303
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 rest_init+0xe8/0xf0 init/main.c:732
 arch_call_rest_init+0x5/0x10 init/main.c:894
 start_kernel+0x59e/0x630 init/main.c:1148
 secondary_startup_64_no_verify+0xcf/0xdb

value changed: 0x00000001 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W          6.2.0-rc6-syzkaller-00083-ge7368fd30165-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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