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BUG: KCSAN: data-race in insert_work / wq_worker_running

read-write to 0xffff888237d2c8e4 of 4 bytes by task 3183 on cpu 1:
 wq_worker_running+0x98/0x120 kernel/workqueue.c:1068
 schedule_timeout+0xcc/0x230 kernel/time/timer.c:2167
 schedule_timeout_uninterruptible kernel/time/timer.c:2201 [inline]
 msleep+0x52/0x70 kernel/time/timer.c:2322
 nsim_fib6_rt_add drivers/net/netdevsim/fib.c:693 [inline]
 nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:759 [inline]
 nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline]
 nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline]
 nsim_fib_event_work+0x1fee/0x2250 drivers/net/netdevsim/fib.c:1492
 process_one_work+0x434/0x860 kernel/workqueue.c:2597
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

read to 0xffff888237d2c8e4 of 4 bytes by interrupt on cpu 0:
 __need_more_worker kernel/workqueue.c:827 [inline]
 insert_work+0x10e/0x190 kernel/workqueue.c:1560
 __queue_work+0x722/0x980 kernel/workqueue.c:1714
 queue_work_on+0x95/0xf0 kernel/workqueue.c:1744
 wg_queue_enqueue_per_device_and_peer drivers/net/wireguard/queueing.h:176 [inline]
 wg_packet_create_data drivers/net/wireguard/send.c:320 [inline]
 wg_packet_send_staged_packets+0x85f/0xad0 drivers/net/wireguard/send.c:387
 wg_packet_send_keepalive+0xe8/0x100 drivers/net/wireguard/send.c:239
 wg_expired_send_persistent_keepalive+0x3c/0x50 drivers/net/wireguard/timers.c:141
 call_timer_fn+0x35/0x290 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x46c/0x650 kernel/time/timer.c:2022
 run_timer_softirq+0x1d/0x40 kernel/time/timer.c:2035
 __do_softirq+0xc1/0x265 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0x3b/0x90 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x6d/0x80 arch/x86/kernel/apic/apic.c:1109
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
 arch_test_and_set_bit arch/x86/include/asm/bitops.h:138 [inline]
 test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline]
 queue_delayed_work_on+0xcb/0x100 kernel/workqueue.c:1899
 nsim_dev_trap_report_work+0x58c/0x5a0
 process_one_work+0x434/0x860 kernel/workqueue.c:2597
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x2e/0x40 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.5.0-rc4-syzkaller-00211-ge6fda526d9db #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: events nsim_dev_trap_report_work
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