Re: WARNING in usbhid_raw_request/usb_submit_urb (3)

From: syzbot
Date: Fri Apr 24 2020 - 11:34:08 EST

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Hello,

syzbot has tested the proposed patch but the reproducer still triggered crash:
INFO: task hung in usb_disable_device

INFO: task kworker/0:1:12 blocked for more than 143 seconds.
Not tainted 5.6.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:1 D23304 12 2 0x80004000
Workqueue: usb_hub_wq hub_event
Call Trace:
schedule+0xcd/0x2b0 kernel/sched/core.c:4154
schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4213
__mutex_lock_common kernel/locking/mutex.c:1033 [inline]
__mutex_lock+0x87c/0x1360 kernel/locking/mutex.c:1103
device_lock include/linux/device.h:771 [inline]
device_del+0x9e/0xd30 drivers/base/core.c:2640
usb_disable_device+0x23d/0x7a0 drivers/usb/core/message.c:1238
usb_disconnect+0x2a5/0x920 drivers/usb/core/hub.c:2211
hub_port_connect drivers/usb/core/hub.c:5049 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5339 [inline]
port_event drivers/usb/core/hub.c:5485 [inline]
hub_event+0x1a56/0x43b0 drivers/usb/core/hub.c:5567
process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
worker_thread+0x96/0xe20 kernel/workqueue.c:2412
kthread+0x318/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: task kworker/1:0:17 blocked for more than 143 seconds.
Not tainted 5.6.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:0 D23392 17 2 0x80004000
Workqueue: usb_hub_wq hub_event
Call Trace:
schedule+0xcd/0x2b0 kernel/sched/core.c:4154
schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4213
__mutex_lock_common kernel/locking/mutex.c:1033 [inline]
__mutex_lock+0x87c/0x1360 kernel/locking/mutex.c:1103
device_lock include/linux/device.h:771 [inline]
device_del+0x9e/0xd30 drivers/base/core.c:2640
usb_disable_device+0x23d/0x7a0 drivers/usb/core/message.c:1238
usb_disconnect+0x2a5/0x920 drivers/usb/core/hub.c:2211
hub_port_connect drivers/usb/core/hub.c:5049 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5339 [inline]
port_event drivers/usb/core/hub.c:5485 [inline]
hub_event+0x1a56/0x43b0 drivers/usb/core/hub.c:5567
process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
worker_thread+0x96/0xe20 kernel/workqueue.c:2412
kthread+0x318/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: task kworker/0:4:3216 blocked for more than 143 seconds.
Not tainted 5.6.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:4 D23696 3216 2 0x80004000
Workqueue: usb_hub_wq hub_event
Call Trace:
schedule+0xcd/0x2b0 kernel/sched/core.c:4154
schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4213
__mutex_lock_common kernel/locking/mutex.c:1033 [inline]
__mutex_lock+0x87c/0x1360 kernel/locking/mutex.c:1103
__input_unregister_device+0x118/0x430 drivers/input/input.c:2087
input_unregister_device+0xb4/0xf0 drivers/input/input.c:2272
hidinput_disconnect+0x15e/0x3d0 drivers/hid/hid-input.c:1968
hid_disconnect+0x13f/0x1a0 drivers/hid/hid-core.c:2008
hid_hw_stop drivers/hid/hid-core.c:2055 [inline]
hid_device_remove+0x186/0x240 drivers/hid/hid-core.c:2298
__device_release_driver drivers/base/dd.c:1135 [inline]
device_release_driver_internal+0x231/0x500 drivers/base/dd.c:1168
bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533
device_del+0x481/0xd30 drivers/base/core.c:2677
hid_remove_device drivers/hid/hid-core.c:2467 [inline]
hid_destroy_device+0xe1/0x150 drivers/hid/hid-core.c:2486
usbhid_disconnect+0x9f/0xe0 drivers/hid/usbhid/hid-core.c:1414
usb_unbind_interface+0x1c6/0x8a0 drivers/usb/core/driver.c:436
__device_release_driver drivers/base/dd.c:1137 [inline]
device_release_driver_internal+0x42f/0x500 drivers/base/dd.c:1168
bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533
device_del+0x481/0xd30 drivers/base/core.c:2677
usb_disable_device+0x23d/0x7a0 drivers/usb/core/message.c:1238
usb_disconnect+0x2a5/0x920 drivers/usb/core/hub.c:2211
hub_port_connect drivers/usb/core/hub.c:5049 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5339 [inline]
port_event drivers/usb/core/hub.c:5485 [inline]
hub_event+0x1a56/0x43b0 drivers/usb/core/hub.c:5567
process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
worker_thread+0x96/0xe20 kernel/workqueue.c:2412
kthread+0x318/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: task kworker/0:5:3229 blocked for more than 144 seconds.
Not tainted 5.6.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:5 D27760 3229 2 0x80004000
Workqueue: events hid_reset
Call Trace:
schedule+0xcd/0x2b0 kernel/sched/core.c:4154
schedule_timeout+0x682/0xb20 kernel/time/timer.c:1871
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common kernel/sched/completion.c:115 [inline]
wait_for_completion+0x26f/0x3c0 kernel/sched/completion.c:136
__flush_work+0x4f9/0xa80 kernel/workqueue.c:3043
__cancel_work_timer+0x32c/0x460 kernel/workqueue.c:3130
hid_cancel_delayed_stuff drivers/hid/usbhid/hid-core.c:1421 [inline]
usbhid_close+0x134/0x210 drivers/hid/usbhid/hid-core.c:750
hid_hw_close+0xa8/0xd0 drivers/hid/hid-core.c:2100
input_close_device+0x110/0x1a0 drivers/input/input.c:682
input_leds_disconnect+0xfd/0x160 drivers/input/input-leds.c:182
__input_unregister_device+0x1b0/0x430 drivers/input/input.c:2090
input_unregister_device+0xb4/0xf0 drivers/input/input.c:2272
hidinput_disconnect+0x15e/0x3d0 drivers/hid/hid-input.c:1968
hid_disconnect+0x13f/0x1a0 drivers/hid/hid-core.c:2008
hid_hw_stop drivers/hid/hid-core.c:2055 [inline]
hid_device_remove+0x186/0x240 drivers/hid/hid-core.c:2298
__device_release_driver drivers/base/dd.c:1135 [inline]
device_release_driver_internal+0x231/0x500 drivers/base/dd.c:1168
bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533
device_del+0x481/0xd30 drivers/base/core.c:2677
hid_remove_device drivers/hid/hid-core.c:2467 [inline]
hid_destroy_device+0xe1/0x150 drivers/hid/hid-core.c:2486
usbhid_disconnect+0x9f/0xe0 drivers/hid/usbhid/hid-core.c:1414
usb_unbind_interface+0x1c6/0x8a0 drivers/usb/core/driver.c:436
__device_release_driver drivers/base/dd.c:1137 [inline]
device_release_driver_internal+0x42f/0x500 drivers/base/dd.c:1168
usb_driver_release_interface+0x102/0x180 drivers/usb/core/driver.c:609
usb_forced_unbind_intf+0x50/0xb0 drivers/usb/core/driver.c:1057
unbind_marked_interfaces.isra.0+0x15e/0x1c0 drivers/usb/core/driver.c:1080
usb_unbind_and_rebind_marked_interfaces+0x34/0x70 drivers/usb/core/driver.c:1141
usb_reset_device+0x742/0x960 drivers/usb/core/hub.c:5967
hid_reset+0x243/0x420 drivers/hid/usbhid/hid-core.c:138
process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
worker_thread+0x96/0xe20 kernel/workqueue.c:2412
kthread+0x318/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: task kworker/0:6:3266 blocked for more than 144 seconds.
Not tainted 5.6.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:6 D27552 3266 2 0x80004000
Workqueue: events hid_reset
Call Trace:
schedule+0xcd/0x2b0 kernel/sched/core.c:4154
schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4213
__mutex_lock_common kernel/locking/mutex.c:1033 [inline]
__mutex_lock+0x87c/0x1360 kernel/locking/mutex.c:1103
__input_unregister_device+0x118/0x430 drivers/input/input.c:2087
input_unregister_device+0xb4/0xf0 drivers/input/input.c:2272
hidinput_disconnect+0x15e/0x3d0 drivers/hid/hid-input.c:1968
hid_disconnect+0x13f/0x1a0 drivers/hid/hid-core.c:2008
hid_hw_stop drivers/hid/hid-core.c:2055 [inline]
hid_device_remove+0x186/0x240 drivers/hid/hid-core.c:2298
__device_release_driver drivers/base/dd.c:1135 [inline]
device_release_driver_internal+0x231/0x500 drivers/base/dd.c:1168
bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533
device_del+0x481/0xd30 drivers/base/core.c:2677
hid_remove_device drivers/hid/hid-core.c:2467 [inline]
hid_destroy_device+0xe1/0x150 drivers/hid/hid-core.c:2486
usbhid_disconnect+0x9f/0xe0 drivers/hid/usbhid/hid-core.c:1414
usb_unbind_interface+0x1c6/0x8a0 drivers/usb/core/driver.c:436
__device_release_driver drivers/base/dd.c:1137 [inline]
device_release_driver_internal+0x42f/0x500 drivers/base/dd.c:1168
usb_driver_release_interface+0x102/0x180 drivers/usb/core/driver.c:609
usb_forced_unbind_intf+0x50/0xb0 drivers/usb/core/driver.c:1057
unbind_marked_interfaces.isra.0+0x15e/0x1c0 drivers/usb/core/driver.c:1080
usb_unbind_and_rebind_marked_interfaces+0x34/0x70 drivers/usb/core/driver.c:1141
usb_reset_device+0x742/0x960 drivers/usb/core/hub.c:5967
hid_reset+0x243/0x420 drivers/hid/usbhid/hid-core.c:138
process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
worker_thread+0x96/0xe20 kernel/workqueue.c:2412
kthread+0x318/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
INFO: task kworker/1:4:3267 blocked for more than 144 seconds.
Not tainted 5.6.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:4 D28272 3267 2 0x80004000
Workqueue: events hid_reset
Call Trace:
schedule+0xcd/0x2b0 kernel/sched/core.c:4154
schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4213
__mutex_lock_common kernel/locking/mutex.c:1033 [inline]
__mutex_lock+0x87c/0x1360 kernel/locking/mutex.c:1103
device_lock include/linux/device.h:771 [inline]
__device_attach+0x7b/0x390 drivers/base/dd.c:874
usb_rebind_intf drivers/usb/core/driver.c:1104 [inline]
rebind_marked_interfaces.isra.0+0x1ea/0x290 drivers/usb/core/driver.c:1127
usb_reset_device+0x742/0x960 drivers/usb/core/hub.c:5967
hid_reset+0x243/0x420 drivers/hid/usbhid/hid-core.c:138
process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
worker_thread+0x96/0xe20 kernel/workqueue.c:2412
kthread+0x318/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Showing all locks held in the system:
5 locks held by kworker/0:1/12:
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881da227dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d4d1e208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#2: ffff8881d4d1e208 (&dev->mutex){....}, at: hub_event+0x1be/0x43b0 drivers/usb/core/hub.c:5513
#3: ffff8881da2f3208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#3: ffff8881da2f3208 (&dev->mutex){....}, at: usb_disconnect+0xa3/0x920 drivers/usb/core/hub.c:2202
#4: ffff8881d8fac190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#4: ffff8881d8fac190 (&dev->mutex){....}, at: device_del+0x9e/0xd30 drivers/base/core.c:2640
5 locks held by kworker/1:0/17:
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881da267dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d4ccf208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#2: ffff8881d4ccf208 (&dev->mutex){....}, at: hub_event+0x1be/0x43b0 drivers/usb/core/hub.c:5513
#3: ffff8881c8d9e208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#3: ffff8881c8d9e208 (&dev->mutex){....}, at: usb_disconnect+0xa3/0x920 drivers/usb/core/hub.c:2202
#4: ffff8881d8fad190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#4: ffff8881d8fad190 (&dev->mutex){....}, at: device_del+0x9e/0xd30 drivers/base/core.c:2640
1 lock held by khungtaskd/23:
#0: ffffffff87108b60 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x264 kernel/locking/lockdep.c:5331
7 locks held by kworker/1:2/83:
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881d8a87dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d4dc2208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#2: ffff8881d4dc2208 (&dev->mutex){....}, at: hub_event+0x1be/0x43b0 drivers/usb/core/hub.c:5513
#3: ffff8881d416f208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#3: ffff8881d416f208 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#4: ffff8881d0a69190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#4: ffff8881d0a69190 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#5: ffff8881c8219a88 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#5: ffff8881c8219a88 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#6: ffffffff877ca580 (input_mutex){+.+.}, at: input_register_device.cold+0x5c/0x316 drivers/input/input.c:2221
1 lock held by in:imklog/256:
#0: ffff8881c8ce1c60 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:826
7 locks held by kworker/0:4/3216:
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881bd4d7dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d4d4d208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#2: ffff8881d4d4d208 (&dev->mutex){....}, at: hub_event+0x1be/0x43b0 drivers/usb/core/hub.c:5513
#3: ffff8881d8eb3208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#3: ffff8881d8eb3208 (&dev->mutex){....}, at: usb_disconnect+0xa3/0x920 drivers/usb/core/hub.c:2202
#4: ffff8881d8fd0190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 drivers/base/dd.c:1165
#5: ffff8881cd365a88 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 drivers/base/dd.c:1165
#6: ffffffff877ca580 (input_mutex){+.+.}, at: __input_unregister_device+0x118/0x430 drivers/input/input.c:2087
7 locks held by kworker/0:5/3229:
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881bd47fdd0 ((work_completion)(&usbhid->reset_work)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d8fad190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 drivers/base/dd.c:1165
#3: ffff8881cd0c1a88 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 drivers/base/dd.c:1165
#4: ffffffff877ca580 (input_mutex){+.+.}, at: __input_unregister_device+0x118/0x430 drivers/input/input.c:2087
#5: ffff8881d8fa02a8 (&dev->mutex#2){+.+.}, at: input_close_device+0x42/0x1a0 drivers/input/input.c:673
#6: ffff8881cd0c1e50 (&hdev->ll_open_lock){+.+.}, at: hid_hw_close+0x1d/0xd0 drivers/hid/hid-core.c:2098
7 locks held by kworker/1:3/3231:
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881cc797dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d4da3208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#2: ffff8881d4da3208 (&dev->mutex){....}, at: hub_event+0x1be/0x43b0 drivers/usb/core/hub.c:5513
#3: ffff8881d0a6e208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#3: ffff8881d0a6e208 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#4: ffff8881cffc8190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#4: ffff8881cffc8190 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#5: ffff8881c81f9a88 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#5: ffff8881c81f9a88 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#6: ffffffff877ca580 (input_mutex){+.+.}, at: input_register_device.cold+0x5c/0x316 drivers/input/input.c:2221
5 locks held by kworker/0:6/3266:
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881c9ec7dd0 ((work_completion)(&usbhid->reset_work)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d8fac190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 drivers/base/dd.c:1165
#3: ffff8881be6d1a88 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 drivers/base/dd.c:1165
#4: ffffffff877ca580 (input_mutex){+.+.}, at: __input_unregister_device+0x118/0x430 drivers/input/input.c:2087
3 locks held by kworker/1:4/3267:
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881da028d28 ((wq_completion)events){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881bd6d7dd0 ((work_completion)(&usbhid->reset_work)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d8fd0190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#2: ffff8881d8fd0190 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
7 locks held by kworker/1:5/3268:
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8881d8944128 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x82a/0x1620 kernel/workqueue.c:2237
#1: ffff8881bd6ffdd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85e/0x1620 kernel/workqueue.c:2241
#2: ffff8881d4d74208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#2: ffff8881d4d74208 (&dev->mutex){....}, at: hub_event+0x1be/0x43b0 drivers/usb/core/hub.c:5513
#3: ffff8881d9302208 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#3: ffff8881d9302208 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#4: ffff8881d9306190 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#4: ffff8881d9306190 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#5: ffff8881c9679a88 (&dev->mutex){....}, at: device_lock include/linux/device.h:771 [inline]
#5: ffff8881c9679a88 (&dev->mutex){....}, at: __device_attach+0x7b/0x390 drivers/base/dd.c:874
#6: ffffffff877ca580 (input_mutex){+.+.}, at: input_register_device.cold+0x5c/0x316 drivers/input/input.c:2221

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 23 Comm: khungtaskd Not tainted 5.6.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xef/0x16e lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1db/0x207 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0xa99/0xfd0 kernel/hung_task.c:289
kthread+0x318/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
NMI backtrace for cpu 1 skipped: idling at default_idle+0x28/0x300 arch/x86/kernel/process.c:695

Tested on:

commit: 0fa84af8 Merge tag 'usb-serial-5.7-rc1' of https://git.ker..
git tree: https://github.com/google/kasan.git
console output: https://syzkaller.appspot.com/x/log.txt?x=13af50b0100000
kernel config: https://syzkaller.appspot.com/x/.config?x=6b9c154b0c23aecf
dashboard link: https://syzkaller.appspot.com/bug?extid=db339689b2101f6f6071
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
patch: https://syzkaller.appspot.com/x/patch.diff?x=16e551cfe00000

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