================================================================== BUG: KCSAN: data-race in add_timer / timer_clear_idle write to 0xffff88812c11dca4 of 1 bytes by task 0 on cpu 1: timer_clear_idle+0x3d/0x50 kernel/time/timer.c:1676 tick_nohz_restart_sched_tick kernel/time/tick-sched.c:860 [inline] __tick_nohz_idle_restart_tick+0x32/0x1a0 kernel/time/tick-sched.c:1161 tick_nohz_idle_exit+0x19c/0x1d0 kernel/time/tick-sched.c:1202 do_idle+0xac/0x290 kernel/sched/idle.c:282 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 start_secondary+0x169/0x1b0 arch/x86/kernel/smpboot.c:268 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 read to 0xffff88812c11dca4 of 1 bytes by task 21 on cpu 0: forward_timer_base kernel/time/timer.c:892 [inline] __mod_timer kernel/time/timer.c:1010 [inline] add_timer+0x2e6/0x550 kernel/time/timer.c:1137 __queue_delayed_work+0x13c/0x1d0 kernel/workqueue.c:1648 queue_delayed_work_on+0xef/0x110 kernel/workqueue.c:1673 queue_delayed_work include/linux/workqueue.h:522 [inline] bond_3ad_state_machine_handler+0xaca/0x28a0 drivers/net/bonding/bond_3ad.c:2353 process_one_work+0x424/0x930 kernel/workqueue.c:2268 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2414 kthread+0x203/0x230 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bond3 bond_3ad_state_machine_handler ==================================================================