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BUG: KCSAN: data-race in kick_pool / wq_worker_running

read-write to 0xffff888237d2a8a4 of 4 bytes by task 36 on cpu 1:
 wq_worker_running+0x9b/0x120 kernel/workqueue.c:1419
 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:7065
 __mutex_lock_common kernel/locking/mutex.c:692 [inline]
 __mutex_lock+0x502/0xed0 kernel/locking/mutex.c:776
 __mutex_lock_slowpath+0xa/0x10 kernel/locking/mutex.c:1065
 mutex_lock+0x88/0x90 kernel/locking/mutex.c:290
 pcpu_balance_workfn+0x49/0xa40 mm/percpu.c:2210
 process_one_work kernel/workqueue.c:3276 [inline]
 process_scheduled_works+0x513/0xa10 kernel/workqueue.c:3359
 worker_thread+0x58a/0x780 kernel/workqueue.c:3440
 kthread+0x22a/0x280 kernel/kthread.c:436
 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888237d2a8a4 of 4 bytes by task 31619 on cpu 0:
 need_more_worker kernel/workqueue.c:937 [inline]
 kick_pool+0x49/0x2d0 kernel/workqueue.c:1259
 __queue_work+0x896/0xaf0 kernel/workqueue.c:2355
 queue_work_on+0xa9/0x140 kernel/workqueue.c:2405
 queue_work include/linux/workqueue.h:669 [inline]
 schedule_work include/linux/workqueue.h:730 [inline]
 pcpu_schedule_balance_work mm/percpu.c:204 [inline]
 pcpu_alloc_noprof+0x728/0x1030 mm/percpu.c:1862
 perf_trace_event_reg kernel/trace/trace_event_perf.c:107 [inline]
 perf_trace_event_init+0x18f/0x7b0 kernel/trace/trace_event_perf.c:202
 perf_trace_init+0x15f/0x1d0 kernel/trace/trace_event_perf.c:226
 perf_tp_event_init+0x68/0xc0 kernel/events/core.c:11270
 perf_try_init_event+0x25a/0x6f0 kernel/events/core.c:13029
 perf_init_event kernel/events/core.c:13127 [inline]
 perf_event_alloc+0xb2b/0x18e0 kernel/events/core.c:13402
 __do_sys_perf_event_open kernel/events/core.c:13924 [inline]
 __se_sys_perf_event_open+0x656/0x1290 kernel/events/core.c:13805
 __x64_sys_perf_event_open+0x67/0x80 kernel/events/core.c:13805
 x64_sys_call+0x2789/0x3020 arch/x86/include/generated/asm/syscalls_64.h:299
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 31619 Comm: syz.1.5457 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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