================================================================== BUG: KCSAN: data-race in insert_work / wq_worker_running read-write to 0xffff888237c2a7e0 of 4 bytes by task 6878 on cpu 0: wq_worker_running+0x96/0xe0 kernel/workqueue.c:880 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x38b/0x8c0 kernel/locking/mutex.c:747 __mutex_lock_slowpath+0xa/0x10 kernel/locking/mutex.c:1035 mutex_lock+0x23/0x30 kernel/locking/mutex.c:286 exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] synchronize_rcu_expedited+0x20a/0x530 kernel/rcu/tree_exp.h:927 synchronize_rcu+0x9d/0x100 kernel/rcu/tree.c:3843 key_garbage_collector+0x76a/0x8e0 security/keys/gc.c:292 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 read to 0xffff888237c2a7e0 of 4 bytes by task 25 on cpu 1: __need_more_worker kernel/workqueue.c:785 [inline] insert_work+0x10e/0x190 kernel/workqueue.c:1365 __queue_work+0x69e/0x8e0 kernel/workqueue.c:1517 queue_work_on+0x7e/0xe0 kernel/workqueue.c:1545 srcu_queue_delayed_work_on kernel/rcu/srcutree.c:697 [inline] srcu_schedule_cbs_sdp kernel/rcu/srcutree.c:710 [inline] srcu_gp_end kernel/rcu/srcutree.c:777 [inline] srcu_advance_state kernel/rcu/srcutree.c:1526 [inline] process_srcu+0x6b1/0xa70 kernel/rcu/srcutree.c:1622 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 value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 25 Comm: kworker/1:1 Not tainted 5.19.0-rc8-syzkaller-00102-g33ea1340bafe-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Workqueue: rcu_gp process_srcu ==================================================================