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BUG: KCSAN: data-race in kick_pool / wq_worker_running

read-write to 0xffff888237c2a8e4 of 4 bytes by task 10551 on cpu 0:
 wq_worker_running+0x9b/0x120 kernel/workqueue.c:1434
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:7340
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x54c/0xf20 kernel/locking/mutex.c:820
 __mutex_lock_slowpath+0xa/0x10 kernel/locking/mutex.c:1114
 mutex_lock+0x88/0x90 kernel/locking/mutex.c:319
 exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
 synchronize_rcu_expedited+0x18a/0x770 kernel/rcu/tree_exp.h:961
 synchronize_rcu+0x35/0x2e0 kernel/rcu/tree.c:3360
 srcu_readers_active_idx_check kernel/rcu/srcutree.c:539 [inline]
 try_check_zero+0x182/0x260 kernel/rcu/srcutree.c:1156
 srcu_advance_state kernel/rcu/srcutree.c:1846 [inline]
 process_srcu+0xd5/0xda0 kernel/rcu/srcutree.c:1973
 process_one_work kernel/workqueue.c:3302 [inline]
 process_scheduled_works+0x4f0/0x9c0 kernel/workqueue.c:3385
 worker_thread+0x58a/0x780 kernel/workqueue.c:3466
 kthread+0x22a/0x280 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888237c2a8e4 of 4 bytes by task 15080 on cpu 1:
 need_more_worker kernel/workqueue.c:952 [inline]
 kick_pool+0x49/0x2d0 kernel/workqueue.c:1274
 __queue_work+0x899/0xaa0 kernel/workqueue.c:2382
 queue_work_on+0xa9/0x140 kernel/workqueue.c:2432
 srcu_queue_delayed_work_on kernel/rcu/srcutree.c:873 [inline]
 srcu_schedule_cbs_sdp kernel/rcu/srcutree.c:886 [inline]
 srcu_gp_end kernel/rcu/srcutree.c:953 [inline]
 srcu_advance_state kernel/rcu/srcutree.c:1869 [inline]
 process_srcu+0xa44/0xda0 kernel/rcu/srcutree.c:1973
 process_one_work kernel/workqueue.c:3302 [inline]
 process_scheduled_works+0x4f0/0x9c0 kernel/workqueue.c:3385
 worker_thread+0x58a/0x780 kernel/workqueue.c:3466
 kthread+0x22a/0x280 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 15080 Comm: kworker/1:14 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: rcu_gp process_srcu
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