================================================================== BUG: KCSAN: data-race in tick_nohz_stop_tick / tick_sched_timer write to 0xffffffff879c1020 of 4 bytes by task 0 on cpu 1: tick_nohz_stop_tick+0x99/0x420 kernel/time/tick-sched.c:837 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1022 [inline] tick_nohz_idle_stop_tick+0x15d/0x310 kernel/time/tick-sched.c:1043 cpuidle_idle_call kernel/sched/idle.c:235 [inline] do_idle+0x176/0x230 kernel/sched/idle.c:299 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:396 secondary_startup_64_no_verify+0xb0/0xbb read to 0xffffffff879c1020 of 4 bytes by interrupt on cpu 0: tick_sched_do_timer kernel/time/tick-sched.c:187 [inline] tick_sched_timer+0x35/0x210 kernel/time/tick-sched.c:1362 __run_hrtimer+0x163/0x460 kernel/time/hrtimer.c:1519 __hrtimer_run_queues kernel/time/hrtimer.c:1583 [inline] hrtimer_interrupt+0x36e/0xa30 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x6f/0x200 arch/x86/kernel/apic/apic.c:1106 asm_call_irq_on_stack+0xf/0x20 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline] run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline] sysvec_apic_timer_interrupt+0x52/0x90 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline] acpi_idle_do_entry drivers/acpi/processor_idle.c:516 [inline] acpi_idle_enter+0x25b/0x2e0 drivers/acpi/processor_idle.c:647 cpuidle_enter_state+0x2b6/0x7c0 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:158 [inline] cpuidle_idle_call kernel/sched/idle.c:239 [inline] do_idle+0x193/0x230 kernel/sched/idle.c:299 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:396 rest_init+0xd7/0xe0 init/main.c:720 arch_call_rest_init+0xa/0xb start_kernel+0x5a1/0x626 init/main.c:1061 secondary_startup_64_no_verify+0xb0/0xbb Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================