INFO: task kworker/0:5:7833 blocked for more than 143 seconds. Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:5 state:D stack: 0 pid: 7833 ppid: 2 flags:0x00000008 Workqueue: usb_hub_wq hub_event Call trace: __switch_to+0x180/0x28c arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x570 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 scsi_remove_host+0x1d0/0x468 drivers/scsi/hosts.c:199 quiesce_and_remove_host+0xa0/0x114 drivers/usb/storage/usb.c:867 usb_stor_disconnect+0x24/0x3c drivers/usb/storage/usb.c:1087 usb_unbind_interface+0x10c/0x388 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:520 [inline] __device_release_driver drivers/base/dd.c:1209 [inline] device_release_driver_internal+0x26c/0x3a8 drivers/base/dd.c:1235 device_release_driver+0x28/0x38 drivers/base/dd.c:1258 bus_remove_device+0x138/0x1b4 drivers/base/bus.c:529 device_del+0x2e0/0x5bc drivers/base/core.c:3704 usb_disable_device+0x14c/0x2e0 drivers/usb/core/message.c:1419 usb_disconnect+0x160/0x3e0 drivers/usb/core/hub.c:2235 hub_port_connect+0xb4/0xdf0 drivers/usb/core/hub.c:5197 hub_port_connect_change+0x3d8/0x67c drivers/usb/core/hub.c:5497 port_event+0x780/0x910 drivers/usb/core/hub.c:5653 hub_event+0x2f0/0x624 drivers/usb/core/hub.c:5735 process_one_work+0x2d8/0x504 kernel/workqueue.c:2289 worker_thread+0x340/0x610 kernel/workqueue.c:2436 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/10: #0: ffff80000d4a3568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/11: #0: ffff80000d4a3bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 3 locks held by kworker/1:1/22: 1 lock held by khungtaskd/26: #0: ffff80000d4a3440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279 2 locks held by getty/2714: #0: ffff0000c7dd5898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f67e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x88c drivers/tty/n_tty.c:2177 5 locks held by kworker/0:5/7833: #0: ffff0000c0c14138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff800021a73d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 #2: ffff0000c6433190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff0000c6433190 (&dev->mutex){....}-{3:3}, at: hub_event+0x8c/0x624 drivers/usb/core/hub.c:5681 #3: ffff000109599190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff000109599190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xa4/0x3e0 drivers/usb/core/hub.c:2226 #4: ffff00010959b918 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff00010959b918 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1038 [inline] #4: ffff00010959b918 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x74/0x3a8 drivers/base/dd.c:1232 3 locks held by udevd/17880: #0: ffff0000fb78fc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline] #0: ffff0000fb78fc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0xc8/0x33c fs/kernfs/file.c:300 #1: ffff000108ebd3f8 (kn->active#22){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline] #1: ffff000108ebd3f8 (kn->active#22){++++}-{0:0}, at: kernfs_fop_read_iter+0xd0/0x33c fs/kernfs/file.c:300 #2: ffff000109599190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline] #2: ffff000109599190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x48/0x200 drivers/usb/core/sysfs.c:873 2 locks held by kworker/u4:7/23897: #0: ffff0000c0014938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff800013343d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 2 locks held by kworker/u4:48/23918: #0: ffff0000c0014938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff800013973d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 2 locks held by kworker/u4:49/23919: #0: ffff0000c0014938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff80001397bd80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 2 locks held by kworker/u4:51/23921: #0: ffff0000c0014938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff800013993d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 2 locks held by kworker/u4:57/23927: #0: ffff0000c0014938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff8000139e3d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 3 locks held by kworker/u4:58/23928: 1 lock held by syz-executor.2/26745: #0: ffff0000fc0c4710 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff0000fc0c4710 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release net/socket.c:649 [inline] #0: ffff0000fc0c4710 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: sock_close+0x40/0xf0 net/socket.c:1365 4 locks held by syz-executor.5/26751: =============================================