================================================================== BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event write to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1: tick_nohz_stop_tick kernel/time/tick-sched.c:781 [inline] __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:973 [inline] tick_nohz_idle_stop_tick+0x52c/0x680 kernel/time/tick-sched.c:994 cpuidle_idle_call kernel/sched/idle.c:151 [inline] do_idle+0x1ad/0x290 kernel/sched/idle.c:269 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 start_secondary+0x169/0x1b0 arch/x86/kernel/smpboot.c:268 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 0: tick_nohz_next_event+0x181/0x340 kernel/time/tick-sched.c:746 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:964 [inline] tick_nohz_idle_stop_tick+0x3b9/0x680 kernel/time/tick-sched.c:994 cpuidle_idle_call kernel/sched/idle.c:151 [inline] do_idle+0x1ad/0x290 kernel/sched/idle.c:269 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 rest_init+0xe4/0xeb init/main.c:667 arch_call_rest_init+0x13/0x2b start_kernel+0x7fe/0x823 init/main.c:1005 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================