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BUG: KCSAN: data-race in __queue_work / wq_worker_running

read-write to 0xffff888237c2abe0 of 4 bytes by task 3114 on cpu 0:
 wq_worker_running+0x96/0xe0 kernel/workqueue.c:880
 schedule_timeout+0xc1/0x290 kernel/time/timer.c:2167
 schedule_timeout_uninterruptible kernel/time/timer.c:2201 [inline]
 msleep+0x57/0x70 kernel/time/timer.c:2322
 nsim_fib4_rt_add drivers/net/netdevsim/fib.c:369 [inline]
 nsim_fib4_rt_insert drivers/net/netdevsim/fib.c:432 [inline]
 nsim_fib4_event drivers/net/netdevsim/fib.c:464 [inline]
 nsim_fib_event drivers/net/netdevsim/fib.c:884 [inline]
 nsim_fib_event_work+0x1897/0x2c30 drivers/net/netdevsim/fib.c:1492
 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289
 process_scheduled_works kernel/workqueue.c:2352 [inline]
 worker_thread+0x7cf/0xa70 kernel/workqueue.c:2438
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read to 0xffff888237c2abe0 of 4 bytes by task 3228 on cpu 1:
 __need_more_worker kernel/workqueue.c:785 [inline]
 insert_work kernel/workqueue.c:1365 [inline]
 __queue_work+0x79e/0xa60 kernel/workqueue.c:1517
 queue_work_on+0x7e/0xe0 kernel/workqueue.c:1545
 srcu_queue_delayed_work_on kernel/rcu/srcutree.c:760 [inline]
 srcu_schedule_cbs_sdp kernel/rcu/srcutree.c:773 [inline]
 srcu_gp_end kernel/rcu/srcutree.c:840 [inline]
 srcu_advance_state kernel/rcu/srcutree.c:1594 [inline]
 process_srcu+0x69e/0xa50 kernel/rcu/srcutree.c:1690
 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289
 worker_thread+0x618/0xa70 kernel/workqueue.c:2436
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3228 Comm: kworker/1:6 Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: rcu_gp process_srcu
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IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready