syzbot

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BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event

write to 0xffffffff8652ebb0 of 4 bytes by task 0 on cpu 0:
 tick_nohz_stop_tick kernel/time/tick-sched.c:1011 [inline]
 tick_nohz_idle_stop_tick+0x1c9/0x640 kernel/time/tick-sched.c:1218
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x178/0x230 kernel/sched/idle.c:332
 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:430
 rest_init+0xef/0xf0 init/main.c:732
 start_kernel+0x57c/0x5e0 init/main.c:1074
 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507
 x86_64_start_kernel+0x94/0xa0 arch/x86/kernel/head64.c:488
 common_startup_64+0x12c/0x137

read to 0xffffffff8652ebb0 of 4 bytes by task 0 on cpu 1:
 tick_nohz_next_event+0x1ee/0x2d0 kernel/time/tick-sched.c:950
 tick_nohz_get_sleep_length+0xac/0x110 kernel/time/tick-sched.c:1350
 menu_select+0x822/0x1070 drivers/cpuidle/governors/menu.c:286
 cpuidle_select+0x45/0x60 drivers/cpuidle/cpuidle.c:359
 cpuidle_idle_call kernel/sched/idle.c:229 [inline]
 do_idle+0x161/0x230 kernel/sched/idle.c:332
 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

value changed: 0x00000000 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G        W          6.9.0-rc2-syzkaller-00435-g9fe30842a90b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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