================================================================== BUG: KCSAN: data-race in insert_work / wq_worker_running read-write to 0xffff888237d2c8e4 of 4 bytes by task 2090 on cpu 1: wq_worker_running+0x98/0x120 kernel/workqueue.c:1068 schedule_timeout+0xcc/0x230 kernel/time/timer.c:2167 synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:572 [inline] synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:624 [inline] rcu_exp_wait_wake kernel/rcu/tree_exp.h:693 [inline] rcu_exp_sel_wait_wake+0x554/0x1380 kernel/rcu/tree_exp.h:727 wait_rcu_exp_gp+0x1e/0x30 kernel/rcu/tree_exp.h:513 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:296 read to 0xffff888237d2c8e4 of 4 bytes by interrupt on cpu 0: __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 queue_work include/linux/workqueue.h:506 [inline] kick_hub_wq+0xdf/0x1b0 drivers/usb/core/hub.c:676 hub_irq+0x285/0x2c0 drivers/usb/core/hub.c:756 __usb_hcd_giveback_urb+0x242/0x2f0 drivers/usb/core/hcd.c:1671 usb_giveback_urb_bh+0x16d/0x280 drivers/usb/core/hcd.c:1704 tasklet_action_common+0xc9/0x2c0 kernel/softirq.c:780 __do_softirq+0xc1/0x265 kernel/softirq.c:553 run_ksoftirqd+0x17/0x20 kernel/softirq.c:921 smpboot_thread_fn+0x30a/0x4a0 kernel/smpboot.c:164 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:296 value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 6.5.0-rc3-syzkaller-00025-g5f0bc0b042fc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 ==================================================================