INFO: task kworker/0:4:4096 blocked for more than 143 seconds.
Not tainted 6.0.0-rc7-syzkaller-00946-g00988f70a076 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4 state:D stack:22000 pid: 4096 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x93f/0x26f0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
rwsem_down_write_slowpath+0x59c/0x11e0 kernel/locking/rwsem.c:1182
__down_write_common kernel/locking/rwsem.c:1297 [inline]
__down_write_common kernel/locking/rwsem.c:1294 [inline]
__down_write kernel/locking/rwsem.c:1306 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1553
usb_deregister_dev+0xa5/0x320 drivers/usb/core/file.c:239
adu_disconnect+0x44/0x1c0 drivers/usb/misc/adutux.c:765
usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458
device_remove drivers/base/dd.c:550 [inline]
device_remove+0x11f/0x170 drivers/base/dd.c:542
__device_release_driver drivers/base/dd.c:1249 [inline]
device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1275
bus_remove_device+0x2e3/0x590 drivers/base/bus.c:529
device_del+0x4f3/0xc80 drivers/base/core.c:3704
usb_disable_device+0x356/0x7a0 drivers/usb/core/message.c:1419
usb_disconnect.cold+0x259/0x6ed drivers/usb/core/hub.c:2235
hub_port_connect drivers/usb/core/hub.c:5197 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
port_event drivers/usb/core/hub.c:5653 [inline]
hub_event+0x1f86/0x4610 drivers/usb/core/hub.c:5735
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2ea/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INFO: task syz-executor.1:5544 blocked for more than 143 seconds.
Not tainted 6.0.0-rc7-syzkaller-00946-g00988f70a076 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29064 pid: 5544 ppid: 1308 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x93f/0x26f0 kernel/sched/core.c:6494
schedule+0xda/0x1b0 kernel/sched/core.c:6570
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396
usb_open+0x204/0x2e0 drivers/usb/core/file.c:48
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x49c/0x1240 fs/open.c:880
do_open fs/namei.c:3557 [inline]
path_openat+0x1c92/0x28f0 fs/namei.c:3691
do_filp_open+0x1b6/0x400 fs/namei.c:3718
do_sys_openat2+0x16d/0x4c0 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]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1340
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f663686d654
RSP: 002b:00007f6635fedca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f66369dd120 RCX: 00007f663686d654
RDX: 0000000000000002 RSI: 00007f6635fedd40 RDI: 00000000ffffff9c
RBP: 00007f6635fedd40 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007fffc168b6df R14: 00007f6635fee300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff87a94550 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/27:
#0: ffffffff87a950a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
6 locks held by kworker/1:2/718:
#0: ffff888109c7f138
((wq_completion)usb_hub_wq
){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000239fda8
((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f4bb190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f4bb190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681
#3: ffff888109ad7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff888109ad7190 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x6ed drivers/usb/core/hub.c:2226
#4: ffff88812b116118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff88812b116118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline]
#4: ffff88812b116118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa0/0x700 drivers/base/dd.c:1272
#5: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_deregister_dev+0xa5/0x320 drivers/usb/core/file.c:239
2 locks held by getty/1239:
#0: ffff888110a81098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177
6 locks held by kworker/0:4/4096:
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900022dfda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f336190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f336190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681
#3: ffff88812af3e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff88812af3e190 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x6ed drivers/usb/core/hub.c:2226
#4: ffff888137fb5118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff888137fb5118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline]
#4: ffff888137fb5118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa0/0x700 drivers/base/dd.c:1272
#5: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_deregister_dev+0xa5/0x320 drivers/usb/core/file.c:239
6 locks held by kworker/1:5/4186:
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900025afda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f3f6190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f3f6190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681
#3: ffff88812a464190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff88812a464190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#4: ffff88811e1d1118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff88811e1d1118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#5: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156
6 locks held by kworker/1:7/9485:
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90006f07da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f529190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f529190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681
#3: ffff888109bf7190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff888109bf7190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#4: ffff888109bf3118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff888109bf3118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#5: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156
7 locks held by kworker/0:3/15090:
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc900036a7da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f331190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f331190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681
#3: ffff888109bfa190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff888109bfa190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#4: ffff88810e54e118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff88810e54e118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#5: ffff88812df95a20 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#5: ffff88812df95a20 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#6: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#6: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156
6 locks held by kworker/0:0/3811:
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109c7f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90002e07da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f446190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f446190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681
#3: ffff88811e1d2190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff88811e1d2190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#4: ffff88811e1d4118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff88811e1d4118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983
#5: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156
2 locks held by syz-executor.1/5543:
#0: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
#1: ffff8881306dd0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396
2 locks held by syz-executor.1/5544:
#0: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
#1: ffff8881306dd0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396
3 locks held by udevd/5574:
#0: ffff88810f9ae888 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline]
#0: ffff88810f9ae888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x710 fs/kernfs/file.c:300
#1: ffff888109088cb8 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline]
#1: ffff888109088cb8 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x710 fs/kernfs/file.c:300
#2: ffff888109bfa190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline]
#2: ffff888109bfa190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
3 locks held by udevd/5576:
#0: ffff888112483488 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline]
#0: ffff888112483488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x710 fs/kernfs/file.c:300
#1: ffff88810ce283a8 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline]
#1: ffff88810ce283a8 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x710 fs/kernfs/file.c:300
#2: ffff88812a464190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline]
#2: ffff88812a464190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
3 locks held by udevd/5696:
#0: ffff88810099a888 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline]
#0: ffff88810099a888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x710 fs/kernfs/file.c:300
#1: ffff88810f41f918 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline]
#1: ffff88810f41f918 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x710 fs/kernfs/file.c:300
#2: ffff888109bf7190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline]
#2: ffff888109bf7190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
1 lock held by syz-executor.1/6061:
#0: ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
1 lock held by syz-executor.1/6062:
#0:
ffffffff88424bb0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
3 locks held by udevd/6572:
#0: ffff8881368f3c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline]
#0: ffff8881368f3c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x710 fs/kernfs/file.c:300
#1: ffff888108bc7830 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline]
#1: ffff888108bc7830 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x710 fs/kernfs/file.c:300
#2: ffff88811e1d2190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline]
#2: ffff88811e1d2190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.0.0-rc7-syzkaller-00946-g00988f70a076 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc18/0xf50 kernel/hung_task.c:369
kthread+0x2ea/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x6f/0xb0 drivers/acpi/processor_idle.c:112