================================================================== BUG: KCSAN: data-race in insert_work / wq_worker_running read-write to 0xffff888237c2c8e4 of 4 bytes by task 13517 on cpu 0: wq_worker_running+0x98/0x120 kernel/workqueue.c:1068 schedule_timeout+0xcc/0x230 kernel/time/timer.c:2167 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common+0xfa/0x1b0 kernel/sched/completion.c:117 usb_start_wait_urb+0xdc/0x190 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x182/0x240 drivers/usb/core/message.c:153 hub_port_init+0x6eb/0x1830 drivers/usb/core/hub.c:4889 hub_port_connect drivers/usb/core/hub.c:5351 [inline] hub_port_connect_change drivers/usb/core/hub.c:5566 [inline] port_event drivers/usb/core/hub.c:5726 [inline] hub_event+0x1ad3/0x2950 drivers/usb/core/hub.c:5808 process_one_work+0x434/0x860 kernel/workqueue.c:2597 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748 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 24243 on cpu 1: __need_more_worker kernel/workqueue.c:827 [inline] insert_work+0x10e/0x190 kernel/workqueue.c:1560 __queue_work+0x722/0x980 kernel/workqueue.c:1714 queue_work_on+0x95/0xf0 kernel/workqueue.c:1744 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:2597 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748 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: 24243 Comm: kworker/1:0 Not tainted 6.5.0-rc5-syzkaller-00021-ga027b2eca0b7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Workqueue: rcu_gp process_srcu ==================================================================