usb 5-1-port1: config error ===================================== WARNING: bad unlock balance detected! 5.16.0-rc1-next-20211118-syzkaller #0 Not tainted ------------------------------------- kworker/0:1/7 is trying to release lock (hcd->address0_mutex) at: [] hub_port_connect drivers/usb/core/hub.c:5402 [inline] [] hub_port_connect_change drivers/usb/core/hub.c:5493 [inline] [] port_event drivers/usb/core/hub.c:5639 [inline] [] hub_event+0x2a9d/0x4450 drivers/usb/core/hub.c:5721 but there are no more locks to release! other info that might help us debug this: 3 locks held by kworker/0:1/7: #0: ffff888141df6538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888141df6538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888141df6538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888141df6538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888141df6538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888141df6538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269 #1: ffffc90000cc7db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273 #2: ffff888055fb1220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff888055fb1220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4450 drivers/usb/core/hub.c:5667 stack backtrace: CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.16.0-rc1-next-20211118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_unlock_imbalance_bug include/trace/events/lock.h:58 [inline] __lock_release kernel/locking/lockdep.c:5316 [inline] lock_release.cold+0x34/0x4e kernel/locking/lockdep.c:5657 __mutex_unlock_slowpath+0x99/0x5e0 kernel/locking/mutex.c:900 hub_port_connect drivers/usb/core/hub.c:5402 [inline] hub_port_connect_change drivers/usb/core/hub.c:5493 [inline] port_event drivers/usb/core/hub.c:5639 [inline] hub_event+0x2a9d/0x4450 drivers/usb/core/hub.c:5721 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295