================================================================== BUG: KCSAN: data-race in __mod_timer / expire_timers write to 0xffff88813bd1bd88 of 8 bytes by interrupt on cpu 1: expire_timers+0x164/0x260 kernel/time/timer.c:1458 __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:629 __preempt_count_add arch/x86/include/asm/preempt.h:79 [inline] delay_tsc+0x53/0xb0 arch/x86/lib/delay.c:79 try_check_zero+0x1cb/0x1f0 kernel/rcu/srcutree.c:707 srcu_advance_state kernel/rcu/srcutree.c:1147 [inline] process_srcu+0x13d/0x770 kernel/rcu/srcutree.c:1242 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 read to 0xffff88813bd1bd88 of 8 bytes by task 58 on cpu 0: __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] bond_mii_monitor+0x1594/0x1620 drivers/net/bonding/bond_main.c:2528 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: 0 PID: 58 Comm: kworker/u4:2 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bond1 bond_mii_monitor ==================================================================