INFO: task syz-executor.1:8114 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack: 0 pid: 8114 ppid: 3066 flags:0x00000001 Call trace: __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629 __mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 device_lock include/linux/device.h:835 [inline] usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087 __fput+0x198/0x3dc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:353 task_work_run+0xc4/0x14c kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 arch/arm64/kernel/signal.c:1127 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 INFO: task syz-executor.4:8124 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack: 0 pid: 8124 ppid: 3067 flags:0x00000009 Call trace: __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629 __mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 device_lock include/linux/device.h:835 [inline] usbdev_open+0xb0/0x370 drivers/usb/core/devio.c:1042 chrdev_open+0x2b4/0x2e8 fs/char_dev.c:414 do_dentry_open+0x330/0x6d0 fs/open.c:880 vfs_open+0x38/0x48 fs/open.c:1016 do_open fs/namei.c:3557 [inline] path_openat+0xe34/0x11c4 fs/namei.c:3691 do_filp_open+0xdc/0x1b8 fs/namei.c:3718 do_sys_openat2+0xb8/0x22c fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_openat fs/open.c:1345 [inline] __se_sys_openat fs/open.c:1340 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1340 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 INFO: task syz-executor.3:8132 blocked for more than 143 seconds. Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack: 0 pid: 8132 ppid: 3070 flags:0x00000009 Call trace: __switch_to+0x180/0x298 arch/arm64/kernel/process.c:557 context_switch kernel/sched/core.c:5182 [inline] __schedule+0x414/0x5a0 kernel/sched/core.c:6494 schedule+0x64/0xa4 kernel/sched/core.c:6570 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629 __mutex_lock_common+0x788/0xca8 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 device_lock include/linux/device.h:835 [inline] usbdev_open+0xb0/0x370 drivers/usb/core/devio.c:1042 chrdev_open+0x2b4/0x2e8 fs/char_dev.c:414 do_dentry_open+0x330/0x6d0 fs/open.c:880 vfs_open+0x38/0x48 fs/open.c:1016 do_open fs/namei.c:3557 [inline] path_openat+0xe34/0x11c4 fs/namei.c:3691 do_filp_open+0xdc/0x1b8 fs/namei.c:3718 do_sys_openat2+0xb8/0x22c fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_openat fs/open.c:1345 [inline] __se_sys_openat fs/open.c:1340 [inline] __arm64_sys_openat+0xb0/0xe0 fs/open.c:1340 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffff80000d433568 (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/12: #0: ffff80000d433bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/27: #0: ffff80000d433440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279 2 locks held by getty/2722: #0: ffff0000c02a5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244 #1: ffff80000f6162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c drivers/tty/n_tty.c:2177 3 locks held by kworker/u5:2/3074: #0: ffff000112922938 ((wq_completion)hci10){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff800012823d80 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 #2: ffff000116790fd0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open net/bluetooth/hci_core.c:481 [inline] #2: ffff000116790fd0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_power_on+0xac/0x51c net/bluetooth/hci_core.c:975 5 locks held by kworker/1:6/3160: #0: ffff0000c0dce138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x270/0x504 kernel/workqueue.c:2262 #1: ffff800012a03d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 kernel/workqueue.c:2264 #2: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: hub_event+0x8c/0x658 drivers/usb/core/hub.c:5681 #3: ffff0000c66d4d08 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3103 [inline] #3: ffff0000c66d4d08 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect+0x33c/0xe30 drivers/usb/core/hub.c:5249 #4: ffff0000c643ad68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect+0x348/0xe30 drivers/usb/core/hub.c:5250 1 lock held by syz-executor.1/8114: #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x40/0x3b8 drivers/usb/core/devio.c:1087 1 lock held by syz-executor.4/8124: #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0xb0/0x370 drivers/usb/core/devio.c:1042 1 lock held by syz-executor.3/8132: #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0xb0/0x370 drivers/usb/core/devio.c:1042 1 lock held by syz-executor.4/8245: #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0xb0/0x370 drivers/usb/core/devio.c:1042 1 lock held by syz-executor.1/8270: #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0xb0/0x370 drivers/usb/core/devio.c:1042 1 lock held by syz-executor.0/8283: #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #0: ffff0000c66d3190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0xb0/0x370 drivers/usb/core/devio.c:1042 5 locks held by syz-executor.1/8364: #0: ffff0000c7324460 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x180/0x46c fs/read_write.c:574 #1: ffff0001166f8688 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x12c/0x294 fs/kernfs/file.c:345 #2: ffff0000c62c05f0 (kn->active#178){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x134/0x294 fs/kernfs/file.c:346 #3: ffff80000d6c41b0 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0x84/0x1c4 drivers/net/netdevsim/bus.c:205 #4: ffff00011a66c8e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff00011a66c8e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline] #4: ffff00011a66c8e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x74/0x3a8 drivers/base/dd.c:1272 =============================================