================================================================== BUG: KCSAN: data-race in __mod_timer / expire_timers write to 0xffff88813bc1bd88 of 8 bytes by interrupt on cpu 0: expire_timers+0x11e/0x260 kernel/time/timer.c:1463 __run_timers+0x338/0x3d0 kernel/time/timer.c:1731 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1744 __do_softirq+0x13c/0x2c3 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu+0xb4/0xc0 kernel/softirq.c:420 sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 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+0x2bd/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+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+0x59b/0x620 init/main.c:1061 secondary_startup_64_no_verify+0xb0/0xbb read to 0xffff88813bc1bd88 of 8 bytes by task 19 on cpu 1: __mod_timer+0x442/0xbf0 kernel/time/timer.c:1035 add_timer+0x38/0x50 kernel/time/timer.c:1142 __queue_delayed_work+0xec/0x150 kernel/workqueue.c:1655 queue_delayed_work_on+0x78/0xc0 kernel/workqueue.c:1680 queue_delayed_work include/linux/workqueue.h:522 [inline] check_lifetime+0x4d7/0x4f0 net/ipv4/devinet.c:794 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275 worker_thread+0x64a/0xaa0 kernel/workqueue.c:2421 kthread+0x1fd/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient check_lifetime ==================================================================