================================================================== BUG: KCSAN: data-race in internal_add_timer / timer_clear_idle write to 0xffff888237d376e5 of 1 bytes by task 0 on cpu 1: timer_clear_idle+0x1e/0x30 kernel/time/timer.c:1702 tick_nohz_idle_retain_tick+0x31/0x40 kernel/time/tick-sched.c:1093 cpuidle_idle_call kernel/sched/idle.c:237 [inline] do_idle+0x1e0/0x240 kernel/sched/idle.c:306 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403 secondary_startup_64_no_verify+0xb0/0xbb read to 0xffff888237d376e5 of 1 bytes by interrupt on cpu 0: trigger_dyntick_cpu kernel/time/timer.c:569 [inline] enqueue_timer kernel/time/timer.c:601 [inline] internal_add_timer+0x224/0x270 kernel/time/timer.c:611 add_timer_on+0x262/0x2a0 kernel/time/timer.c:1182 clocksource_watchdog+0xa74/0xac0 kernel/time/clocksource.c:478 call_timer_fn+0x2e/0x1d0 kernel/time/timer.c:1421 expire_timers+0x135/0x240 kernel/time/timer.c:1466 __run_timers+0x358/0x420 kernel/time/timer.c:1734 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1747 __do_softirq+0x12c/0x26e kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x9a/0xb0 kernel/softirq.c:636 sysvec_apic_timer_interrupt+0x69/0x80 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline] acpi_idle_do_entry drivers/acpi/processor_idle.c:553 [inline] acpi_idle_enter+0x258/0x2e0 drivers/acpi/processor_idle.c:688 cpuidle_enter_state+0x2b6/0x750 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+0x1a3/0x240 kernel/sched/idle.c:306 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403 rest_init+0xee/0x100 init/main.c:719 arch_call_rest_init+0xa/0xb start_kernel+0x5ae/0x633 init/main.c:1125 secondary_startup_64_no_verify+0xb0/0xbb value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================