syzbot

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BUG: KCSAN: data-race in tick_nohz_stop_tick / tick_nohz_stop_tick

write to 0xffffffff85ed1ea0 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick+0xa5/0x410 kernel/time/tick-sched.c:888
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1107 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1128
 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+0xc4/0xcb

read to 0xffffffff85ed1ea0 of 4 bytes by task 0 on cpu 0:
 tick_nohz_stop_tick+0x7f/0x410 kernel/time/tick-sched.c:887
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1107 [inline]
 tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1128
 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
 rest_init+0xe8/0xf0 init/main.c:726
 start_kernel+0x0/0x669 init/main.c:882
 start_kernel+0x5e4/0x669 init/main.c:1140
 secondary_startup_64_no_verify+0xc4/0xcb

value changed: 0x00000001 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.18.0-rc7-syzkaller-00121-g3d7285a335ed-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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