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BUG: KCSAN: data-race in insert_work / wq_worker_running

read-write to 0xffff888237c2c8e4 of 4 bytes by task 3183 on cpu 0:
 wq_worker_running+0x98/0x120 kernel/workqueue.c:1071
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:6845
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x368/0x8d0 kernel/locking/mutex.c:747
 __mutex_lock_slowpath+0xa/0x10 kernel/locking/mutex.c:1035
 mutex_lock+0x28/0x30 kernel/locking/mutex.c:286
 rtnl_lock+0x15/0x20 net/core/rtnetlink.c:78
 addrconf_dad_work+0x56/0xbc0 net/ipv6/addrconf.c:4093
 process_one_work+0x434/0x860 kernel/workqueue.c:2600
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2751
 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 0xffff888237c2c8e4 of 4 bytes by task 2732 on cpu 1:
 __need_more_worker kernel/workqueue.c:830 [inline]
 insert_work+0x10e/0x190 kernel/workqueue.c:1563
 __queue_work+0x722/0x980 kernel/workqueue.c:1717
 queue_work_on+0x95/0xf0 kernel/workqueue.c:1747
 srcu_queue_delayed_work_on kernel/rcu/srcutree.c:808 [inline]
 srcu_schedule_cbs_sdp kernel/rcu/srcutree.c:821 [inline]
 srcu_gp_end kernel/rcu/srcutree.c:889 [inline]
 srcu_advance_state kernel/rcu/srcutree.c:1671 [inline]
 process_srcu+0x710/0xae0 kernel/rcu/srcutree.c:1769
 process_one_work+0x434/0x860 kernel/workqueue.c:2600
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2751
 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: 1 PID: 2732 Comm: kworker/1:2 Tainted: G        W          6.5.0-rc6-syzkaller-00030-gd4f8e13b0614 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: rcu_gp process_srcu
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