================================================================== BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer write to 0xffffffff87f52650 of 4 bytes by interrupt on cpu 0: tick_sched_do_timer kernel/time/tick-sched.c:141 [inline] tick_sched_timer+0x205/0x220 kernel/time/tick-sched.c:1313 __run_hrtimer+0x154/0x4b0 kernel/time/hrtimer.c:1520 __hrtimer_run_queues kernel/time/hrtimer.c:1584 [inline] hrtimer_interrupt+0x37c/0xa40 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xa3/0x280 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0x80/0xd0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:585 native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 arch_safe_halt arch/x86/include/asm/paravirt.h:150 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline] acpi_idle_do_entry drivers/acpi/processor_idle.c:525 [inline] acpi_idle_enter+0x2ff/0x680 drivers/acpi/processor_idle.c:651 cpuidle_enter_state+0x245/0x5d0 drivers/cpuidle/cpuidle.c:235 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:346 call_cpuidle kernel/sched/idle.c:126 [inline] cpuidle_idle_call kernel/sched/idle.c:214 [inline] do_idle+0x229/0x310 kernel/sched/idle.c:276 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:372 rest_init+0xd8/0xe0 init/main.c:705 arch_call_rest_init+0xa/0xb start_kernel+0x608/0x6d0 init/main.c:1043 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 read to 0xffffffff87f52650 of 4 bytes by task 0 on cpu 1: tick_nohz_next_event+0x21d/0x310 kernel/time/tick-sched.c:746 tick_nohz_get_sleep_length+0xca/0x140 kernel/time/tick-sched.c:1099 menu_select+0x328/0x1030 drivers/cpuidle/governors/menu.c:283 cpuidle_select+0x3d/0x50 drivers/cpuidle/cpuidle.c:317 cpuidle_idle_call kernel/sched/idle.c:205 [inline] do_idle+0x1eb/0x310 kernel/sched/idle.c:276 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:372 start_secondary+0xe3/0x110 arch/x86/kernel/smpboot.c:268 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================