vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: connection closed vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device INFO: task kworker/0:1:24 blocked for more than 140 seconds. Not tainted 4.14.218-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:1 D26904 24 2 0x80000000 Workqueue: usb_hub_wq hub_event vhci_hcd vhci_hcd.0: port 1 already used Call Trace: context_switch syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3384 vhci_hcd vhci_hcd.0: port 1 already used schedule+0x8d/0x1b0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3428 usb_kill_urb.part.0+0x125/0x190 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:691 vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: connection closed vhci_hcd: stop threads usb_kill_urb+0x7c/0x90 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:686 vhci_hcd: release socket usb_start_wait_urb+0x209/0x440 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:62 vhci_hcd: disconnect device vhci_hcd: connection closed vhci_hcd: stop threads usb_internal_control_msg syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:100 [inline] usb_control_msg+0x302/0x450 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:151 vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd vhci_hcd.0: port 1 already used hub_port_init+0xfdc/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4555 hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4905 [inline] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] hub_event+0x18fd/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116 vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: connection closed vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 INFO: task kworker/1:2:3151 blocked for more than 140 seconds. Not tainted 4.14.218-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:2 D27248 3151 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3384 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3428 usb_kill_urb.part.0+0x125/0x190 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:691 usb_kill_urb+0x7c/0x90 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:686 usb_start_wait_urb+0x209/0x440 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:62 usb_internal_control_msg syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:100 [inline] usb_control_msg+0x302/0x450 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:151 hub_port_init+0xfdc/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4555 vhci_hcd vhci_hcd.0: port 1 already used hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4905 [inline] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] hub_event+0x18fd/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 INFO: task kworker/1:3:8439 blocked for more than 140 seconds. vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: port 1 already used vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) Not tainted 4.14.218-syzkaller #0 vhci_hcd: connection closed vhci_hcd vhci_hcd.0: port 1 already used vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3) "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd vhci_hcd.0: pdev(5) rhport(0) sockfd(3) vhci_hcd: stop threads vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: connection closed vhci_hcd: connection closed vhci_hcd: release socket kworker/1:3 D27240 8439 2 0x80000000 vhci_hcd: disconnect device Workqueue: usb_hub_wq hub_event vhci_hcd: stop threads vhci_hcd: release socket Call Trace: context_switch syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3384 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3428 vhci_hcd: disconnect device usb_kill_urb.part.0+0x125/0x190 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:691 vhci_hcd: stop threads vhci_hcd: release socket usb_kill_urb+0x7c/0x90 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:686 usb_start_wait_urb+0x209/0x440 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:62 vhci_hcd: disconnect device vhci_hcd vhci_hcd.0: port 1 already used usb_internal_control_msg syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:100 [inline] usb_control_msg+0x302/0x450 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:151 hub_port_init+0xfdc/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4555 hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4905 [inline] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] hub_event+0x18fd/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: connection closed process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116 vhci_hcd vhci_hcd.0: port 1 already used worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250 vhci_hcd: stop threads kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 vhci_hcd: release socket vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3) vhci_hcd: disconnect device vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd vhci_hcd.0: port 1 already used ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 vhci_hcd: connection closed vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: stop threads INFO: task kworker/1:4:9134 blocked for more than 140 seconds. Not tainted 4.14.218-syzkaller #0 vhci_hcd: release socket "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. vhci_hcd: disconnect device vhci_hcd: connection closed vhci_hcd: stop threads vhci_hcd: release socket kworker/1:4 D27344 9134 2 0x80000000 vhci_hcd: disconnect device Workqueue: usb_hub_wq hub_event Call Trace: context_switch syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3384 schedule+0x8d/0x1b0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3428 usb_kill_urb.part.0+0x125/0x190 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:691 usb_kill_urb+0x7c/0x90 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:686 usb_start_wait_urb+0x209/0x440 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:62 usb_internal_control_msg syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:100 [inline] usb_control_msg+0x302/0x450 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:151 hub_port_init+0xfdc/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4555 hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4905 [inline] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] hub_event+0x18fd/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 vhci_hcd vhci_hcd.0: port 1 already used ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 INFO: task kworker/0:4:9155 blocked for more than 140 seconds. Not tainted 4.14.218-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:4 D27736 9155 2 0x80000000 Workqueue: usb_hub_wq hub_event vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(3) Call Trace: vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd vhci_hcd.0: port 1 already used context_switch syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3384 vhci_hcd vhci_hcd.0: port 1 already used schedule+0x8d/0x1b0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3428 usb_kill_urb.part.0+0x125/0x190 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:691 vhci_hcd vhci_hcd.0: pdev(5) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd vhci_hcd.0: pdev(3) rhport(0) sockfd(3) vhci_hcd: connection closed vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: stop threads vhci_hcd: connection closed vhci_hcd: connection closed vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd: stop threads vhci_hcd: release socket usb_kill_urb+0x7c/0x90 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:686 vhci_hcd: disconnect device usb_start_wait_urb+0x209/0x440 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:62 vhci_hcd: stop threads vhci_hcd: release socket vhci_hcd: disconnect device vhci_hcd vhci_hcd.0: port 1 already used usb_internal_control_msg syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:100 [inline] usb_control_msg+0x302/0x450 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:151 vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) hub_port_init+0xfdc/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4555 hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4905 [inline] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] hub_event+0x18fd/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 vhci_hcd: connection closed vhci_hcd: stop threads process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116 vhci_hcd: release socket worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250 vhci_hcd: disconnect device kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 INFO: task kworker/0:5:9497 blocked for more than 140 seconds. vhci_hcd vhci_hcd.0: port 1 already used Not tainted 4.14.218-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. vhci_hcd vhci_hcd.0: pdev(2) rhport(0) sockfd(3) kworker/0:5 D vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: connection closed vhci_hcd: stop threads vhci_hcd vhci_hcd.0: port 1 already used vhci_hcd: release socket 28528 9497 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3384 vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3) vhci_hcd: disconnect device vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd: connection closed vhci_hcd: stop threads vhci_hcd: release socket schedule+0x8d/0x1b0 syzkaller/managers/linux-4-14/kernel/kernel/sched/core.c:3428 vhci_hcd: disconnect device usb_kill_urb.part.0+0x125/0x190 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:691 usb_kill_urb+0x7c/0x90 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/urb.c:686 usb_start_wait_urb+0x209/0x440 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:62 usb_internal_control_msg syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:100 [inline] usb_control_msg+0x302/0x450 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/message.c:151 hub_port_init+0xfdc/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4555 hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4905 [inline] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] hub_event+0x18fd/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 process_one_work+0x793/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2250 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 Showing all locks held in the system: 5 locks held by kworker/0:1/24: #0: ("usb_hub_wq"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2087 #1: ((&hub->events)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2091 #2: (&dev->mutex){....}, at: [] device_lock syzkaller/managers/linux-4-14/kernel/./include/linux/device.h:1081 [inline] #2: (&dev->mutex){....}, at: [] hub_event+0x108/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5220 #3: (&port_dev->status_lock){+.+.}, at: [] usb_lock_port syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:2934 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4904 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_event+0x18e8/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 #4: (hcd->address0_mutex){+.+.}, at: [] hub_port_init+0x15b/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4429 1 lock held by khungtaskd/1531: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a syzkaller/managers/linux-4-14/kernel/kernel/locking/lockdep.c:4548 vhci_hcd vhci_hcd.0: port 1 already used 5 locks held by kworker/1:2/3151: #0: ("usb_hub_wq"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2087 #1: ((&hub->events)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2091 #2: (&dev->mutex){....}, at: [] device_lock syzkaller/managers/linux-4-14/kernel/./include/linux/device.h:1081 [inline] #2: (&dev->mutex){....}, at: [] hub_event+0x108/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5220 #3: (&port_dev->status_lock){+.+.}, at: [] usb_lock_port syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:2934 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4904 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_event+0x18e8/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 #4: (hcd->address0_mutex){+.+.}, at: [] hub_port_init+0x15b/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4429 5 locks held by kworker/1:3/8439: #0: ("usb_hub_wq"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2087 #1: ((&hub->events)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2091 #2: (&dev->mutex){....}, at: [] device_lock syzkaller/managers/linux-4-14/kernel/./include/linux/device.h:1081 [inline] #2: (&dev->mutex){....}, at: [] hub_event+0x108/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5220 #3: (&port_dev->status_lock){+.+.}, at: [] usb_lock_port syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:2934 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4904 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_event+0x18e8/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 #4: (hcd->address0_mutex){+.+.}, at: [] hub_port_init+0x15b/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4429 5 locks held by kworker/1:4/9134: #0: ("usb_hub_wq"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2087 #1: ((&hub->events)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2091 #2: (&dev->mutex){....}, at: [] device_lock syzkaller/managers/linux-4-14/kernel/./include/linux/device.h:1081 [inline] #2: (&dev->mutex){....}, at: [] hub_event+0x108/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5220 #3: (&port_dev->status_lock){+.+.}, at: [] usb_lock_port syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:2934 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4904 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_event+0x18e8/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 #4: (hcd->address0_mutex){+.+.}, at: [] hub_port_init+0x15b/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4429 5 locks held by kworker/0:4/9155: #0: ("usb_hub_wq"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2087 #1: ((&hub->events)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2091 #2: (&dev->mutex){....}, at: [] device_lock syzkaller/managers/linux-4-14/kernel/./include/linux/device.h:1081 [inline] #2: (&dev->mutex){....}, at: [] hub_event+0x108/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5220 #3: (&port_dev->status_lock){+.+.}, at: [] usb_lock_port syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:2934 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4904 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_event+0x18e8/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 #4: (hcd->address0_mutex){+.+.}, at: [] hub_port_init+0x15b/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4429 5 locks held by kworker/0:5/9497: #0: ("usb_hub_wq"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2087 #1: ((&hub->events)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 syzkaller/managers/linux-4-14/kernel/kernel/workqueue.c:2091 #2: (&dev->mutex){....}, at: [] device_lock syzkaller/managers/linux-4-14/kernel/./include/linux/device.h:1081 [inline] #2: (&dev->mutex){....}, at: [] hub_event+0x108/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5220 #3: (&port_dev->status_lock){+.+.}, at: [] usb_lock_port syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:2934 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4904 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect_change syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5088 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] port_event syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5194 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_event+0x18e8/0x3d70 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:5274 #4: (hcd->address0_mutex){+.+.}, at: [] hub_port_init+0x15b/0x2970 syzkaller/managers/linux-4-14/kernel/drivers/usb/core/hub.c:4429 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1531 Comm: khungtaskd Not tainted 4.14.218-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 syzkaller/managers/linux-4-14/kernel/lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 syzkaller/managers/linux-4-14/kernel/lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 syzkaller/managers/linux-4-14/kernel/lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace syzkaller/managers/linux-4-14/kernel/./include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks syzkaller/managers/linux-4-14/kernel/kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 syzkaller/managers/linux-4-14/kernel/kernel/hung_task.c:274 kthread+0x30d/0x420 syzkaller/managers/linux-4-14/kernel/kernel/kthread.c:232 vhci_hcd vhci_hcd.0: pdev(1) rhport(0) sockfd(3) ret_from_fork+0x24/0x30 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/entry_64.S:404 vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4611 Comm: systemd-journal Not tainted 4.14.218-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a181a500 task.stack: ffff8880a1820000 RIP: 0010:lowmem_page_address syzkaller/managers/linux-4-14/kernel/./include/linux/mm.h:1097 [inline] RIP: 0010:kasan_poison_slab+0x13/0x60 syzkaller/managers/linux-4-14/kernel/mm/kasan/kasan.c:398 RSP: 0018:ffff8880a1827d18 EFLAGS: 00000006 RAX: 00fff00000008100 RBX: ffff88823f8bb200 RCX: 0000000000000001 RDX: 0000000000002000 RSI: 0000000000000000 RDI: ffffea000221ac00 RBP: 00000000000402c0 R08: 0000000000001000 R09: ffffed10110d6000 R10: 0000000000000000 R11: ffff8880a181a500 R12: ffffea000221ac00 R13: 0000000000000002 R14: 0000000000000000 R15: ffff88823f8bb200 FS: 00007f52770608c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d0793 CR3: 00000000a18bb000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cache_grow_begin+0x405/0x630 syzkaller/managers/linux-4-14/kernel/mm/slab.c:2702 cache_alloc_refill+0x273/0x350 syzkaller/managers/linux-4-14/kernel/mm/slab.c:3043 ____cache_alloc syzkaller/managers/linux-4-14/kernel/mm/slab.c:3125 [inline] __do_cache_alloc syzkaller/managers/linux-4-14/kernel/mm/slab.c:3347 [inline] slab_alloc syzkaller/managers/linux-4-14/kernel/mm/slab.c:3382 [inline] kmem_cache_alloc+0x333/0x3c0 syzkaller/managers/linux-4-14/kernel/mm/slab.c:3550 getname_flags+0xc8/0x550 syzkaller/managers/linux-4-14/kernel/fs/namei.c:138 do_sys_open+0x1ce/0x410 syzkaller/managers/linux-4-14/kernel/fs/open.c:1075 do_syscall_64+0x1d5/0x640 syzkaller/managers/linux-4-14/kernel/arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f527631c6f0 RSP: 002b:00007ffcc6d6ffa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 000055919257ca80 RCX: 00007f527631c6f0 RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 00007ffcc6d70080 RBP: 0000000000000008 R08: 0000000000000008 R09: 0000000000000001 R10: 0000000000080000 R11: 0000000000000246 R12: 00007f5276d647b4 R13: 0000000000000001 R14: 000000000000001b R15: 000055919257ca5f Code: 8b 8f fc 00 00 00 85 d2 0f 95 c0 48 c1 e0 04 85 c9 74 04 48 83 c0 08 c3 48 8b 07 ba 00 10 00 00 f6 c4 80 74 06 8b 4f 6c 48 d3 e2 <48> b8 00 00 00 00 00 16 00 00 be fc 00 00 00 48 b9 00 00 00 00 vhci_hcd vhci_hcd.0: port 1 already used vhci_hcd vhci_hcd.0: port 1 already used vhci_hcd vhci_hcd.0: pdev(5) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: pdev(4) rhport(0) sockfd(3) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless) vhci_hcd vhci_hcd.0: devid(0) speed(4) speed_str(wireless)