Extracting prog: 8m3.189963179s
Minimizing prog: 16m42.674188532s
Simplifying prog options: 19m24.760908019s
Extracting C: 5m18.00739712s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

program crashed: INFO: task hung in linkwatch_event
single: successfully extracted reproducer
found reproducer with 1 syscalls
minimizing guilty program
testing program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, 0x0, 0x0)

program did not crash
testing program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB, @ANYRES64], 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=8m11.978097124s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

VM was preempted during syz execution: failed to run command in VM: instance is preempted, retrying
program did not crash
testing program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

program did not crash
testing program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

program did not crash
validation run: crashed=false
testing program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

program crashed: INFO: rcu detected stall in worker_thread
validation run: crashed=true
testing program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

program crashed: INFO: rcu detected stall in worker_thread
validation run: crashed=true
testing program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

program did not crash
validation run: crashed=false
testing program (duration=8m11.978097124s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x2d, &(0x7f0000000200)=ANY=[@ANYBLOB="12010000eafa7240936901b02926f400100109021b000124a800800904000001030000000905", @ANYRES64], 0x0)

program crashed: INFO: task hung in __input_unregister_device
validation run: crashed=true
reproducing took 1h15m21.148425142s
repro crashed as (corrupted=false):
INFO: task kworker/1:6:6086 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6     state:D
 stack:23656 pid:6086  tgid:6086  ppid:2      task_flags:0x4288060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7326
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821
 class_mutex_constructor include/linux/mutex.h:253 [inline]
 __input_unregister_device+0x2d8/0x650 drivers/input/input.c:2204
 input_unregister_device+0x9b/0x100 drivers/input/input.c:2438
 usb_cleanup+0x7b/0x1c0 drivers/input/misc/yealink.c:784
 usb_disconnect+0x42/0x70 drivers/input/misc/yealink.c:802
 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:618 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372
 bus_remove_device+0x444/0x560 drivers/base/bus.c:664
 device_del+0x524/0x8f0 drivers/base/core.c:3961
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478
 usb_disconnect+0x346/0x9a0 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1bbb/0x4d30 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Showing all locks held in the system:
9 locks held by kworker/0:1/10:
3 locks held by kworker/u8:1/13:
 #0: 
ffff8880317ed940
 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc90000127c40
 (
(work_completion)(&(&ifa->dad_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffffffff9002cf40
 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x116/0x15c0 net/ipv6/addrconf.c:4229
1 lock held by khungtaskd/32:
 #0: 
ffffffff8eb59c60
 (
rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
6 locks held by kworker/0:2/188:
4 locks held by kworker/u9:1/4935:
 #0: ffff88807a0cc140 ((wq_completion)hci14#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: ffff88807a0cc140 ((wq_completion)hci14#2){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc9000ff6fc40
 (
(work_completion)(&hdev->rx_work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffff8880345500b8
 (
&hdev->lock
){+.+.}-{4:4}
, at: hci_conn_complete_evt+0xba/0x1350 net/bluetooth/hci_event.c:3121
 #3: 
ffff888027a1c890
 (&p->pi_lock
){-.-.}-{2:2}
, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:572 [inline]
, at: try_to_wake_up+0x67/0x14d0 kernel/sched/core.c:4292
4 locks held by udevd/4985:
2 locks held by getty/5372:
 #0: 
ffff8880352f00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc9000322b2e8
 (
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
4 locks held by udevd/5707:
 #0: 
ffff888075e9d3f8
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xa4/0xca0 fs/seq_file.c:183
 #1: 
ffff888071771480 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x5d/0x420 fs/kernfs/file.c:165
 #2: 
ffff888033287e18 (kn->active#28
){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
){.+.+}-{0:0}, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:166
 #3: 
ffff8880217b61d8 (&dev->mutex){....}-{4:4}, at: device_lock_interruptible include/linux/device.h:1107 [inline]
ffff8880217b61d8 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
5 locks held by kworker/u8:2/5746:
5 locks held by kworker/0:3/5789:
2 locks held by kworker/0:4/5812:
1 lock held by syz-executor/5821:
 #0: 
ffffffff8eb5ff68
 (
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961
1 lock held by syz-executor/5830:
 #0: 
ffffffff9002cf40 (
rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:641 [inline]
rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0 drivers/net/tun.c:3506
1 lock held by syz-executor/5832:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:641 [inline]
){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0 drivers/net/tun.c:3506
3 locks held by kworker/u8:7/5843:
 #0: 
ffff88801b064140
 (
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc900033f7c40
 (
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:313
6 locks held by kworker/1:5/5993:
 #0: 
ffff888022abf940 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
ffff888022abf940 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: ffffc90003727c40 ((work_completion)(&hub->events)){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: ffff888029beb1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
 #2: ffff888029beb1d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30 drivers/usb/core/hub.c:5899
 #3: 
ffff88805aae91d8
 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073
 #4: 
ffff8880570701a0 (&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:1102 [inline]
, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073
 #5: 
ffffffff8faa5440
 (
input_mutex
){+.+.}-{4:4}
, at: class_mutex_intr_constructor include/linux/mutex.h:255 [inline]
, at: input_register_device+0xa7f/0x1150 drivers/input/input.c:2394
3 locks held by kworker/0:5/6007:
5 locks held by kworker/0:6/6008:
6 locks held by kworker/1:6/6086:
 #0: ffff888022abf940
 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc9000203fc40
 (
(work_completion)(&hub->events)
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffff8880299931d8
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1102 [inline]
, at: hub_event+0x184/0x4d30 drivers/usb/core/hub.c:5899
 #3: 
ffff88802c30a1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
ffff88802c30a1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0xfc/0x9a0 drivers/usb/core/hub.c:2336
 #4: 
ffff88802b9ab1a0
 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880 drivers/base/dd.c:1369
 #5: ffffffff8faa5440 (
input_mutex
){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
){+.+.}-{4:4}, at: __input_unregister_device+0x2d8/0x650 drivers/input/input.c:2204
4 locks held by udevd/6170:
 #0: ffff8880782391b8 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xa4/0xca0 fs/seq_file.c:183
 #1: 
ffff888056a6ac80
 (
&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x5d/0x420 fs/kernfs/file.c:165
 #2: 
ffff88803449cd28 (kn->active#28){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
ffff88803449cd28 (kn->active#28){.+.+}-{0:0}, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:166
 #3: ffff88802c30a1d8 (&dev->mutex){....}-{4:4}, at: device_lock_interruptible include/linux/device.h:1107 [inline]
 #3: ffff88802c30a1d8 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
3 locks held by kworker/1:7/6184:
 #0: 
ffff88801b02b140
 (
(wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
(wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: ffffc90003607c40 (netdev_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffffc90003607c40 (netdev_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}
, at: netdev_work_proc+0x6f/0x770 net/core/netdev_work.c:116
4 locks held by udevd/6198:
 #0: 
ffff8880257db998
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xa4/0xca0 fs/seq_file.c:183
 #1: 
ffff888070843880 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x5d/0x420 fs/kernfs/file.c:165
 #2: 
ffff8880227cc968 (kn->active#28){.+.+}-{0:0}
, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:166
 #3: 
ffff88805aae91d8
 (
&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:1107 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
1 lock held by syz-executor/6204:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
3 locks held by kworker/1:8/6208:
 #0: 
ffff88801b029d40
 (
(wq_completion)events_power_efficient
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc900038d7c40
 (
(reg_check_chans).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: reg_check_chans_work+0xac/0x1110 net/wireless/reg.c:2469
3 locks held by syz-executor/6212:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
, at: rtnl_newlink+0x8a3/0x1bd0 net/core/rtnetlink.c:4158
 #1: ffff888029b08e70 (&dev_instance_lock_key#23){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2847 [inline]
 #1: ffff888029b08e70 (&dev_instance_lock_key#23){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 #1: ffff888029b08e70 (&dev_instance_lock_key#23){+.+.}-{4:4}, at: do_setlink+0x3d4/0x4670 net/core/rtnetlink.c:3125
 #2: 
ffffffff8eb5ff68
 (
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
2 locks held by syz-executor/6213:
 #0: 
ffffffff9001e388
 (
pernet_ops_rwsem
){++++}-{4:4}
, at: copy_net_ns+0x4e2/0x720 net/core/net_namespace.c:575
 #1: 
ffffffff9002cf40
 (rtnl_mutex){+.+.}-{4:4}, at: register_nexthop_notifier+0x8b/0x290 net/ipv4/nexthop.c:4017
1 lock held by syz-executor/6242:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6248:
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6249:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6257:
 #0: 
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6265:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6266:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6278:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6284:
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6285:
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6295:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6301:
 #0: 
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6303:
 #0: 
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6322:
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
3 locks held by modprobe/6334:
2 locks held by modprobe/6335:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
 nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
yealink 2-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5703 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
Workqueue: wg-crypt-wg2 wg_packet_tx_worker
RIP: 0010:io_serial_out+0x7c/0xc0 drivers/tty/serial/8250/8250_port.c:408
Code: 6a 60 fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 9c fb cd fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d e9 62 39 aa fb cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc90000007350 EFLAGS: 00000002
RAX: 0000000000000020 RBX: 0000000000000020 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00000000000003f8 R08: ffff8881416d0237 R09: 1ffff110282da046
R10: dffffc0000000000 R11: ffffffff85660720 R12: dffffc0000000000
R13: ffffffff9aad70a0 R14: ffffffff9aad70e0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124f54000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562a9449fca8 CR3: 0000000034bf1000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 serial_port_out include/linux/serial_core.h:813 [inline]
 serial8250_console_putchar drivers/tty/serial/8250/8250_port.c:3245 [inline]
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:-1 [inline]
 serial8250_console_write+0x13b6/0x1ba0 drivers/tty/serial/8250/8250_port.c:3385
 console_emit_next_record kernel/printk/printk.c:3183 [inline]
 console_flush_one_record kernel/printk/printk.c:3269 [inline]
 console_flush_all+0x6ea/0xaf0 kernel/printk/printk.c:3343
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413
 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479
 dev_vprintk_emit+0x338/0x400 drivers/base/core.c:4996
 dev_printk_emit+0xee/0x140 drivers/base/core.c:5007
 _dev_err+0x11e/0x180 drivers/base/core.c:5062
 urb_ctl_callback+0x1d1/0x290 drivers/input/misc/yealink.c:447
 __usb_hcd_giveback_urb+0x374/0x530 drivers/usb/core/hcd.c:1657
 dummy_timer+0xac3/0x4b40 drivers/usb/gadget/udc/dummy_hcd.c:2005
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2096
 hrtimer_run_softirq+0x17a/0x240 kernel/time/hrtimer.c:2113
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 do_softirq+0x76/0xd0 kernel/softirq.c:523
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
 wg_socket_send_skb_to_peer+0x16b/0x1d0 drivers/net/wireguard/socket.c:183
 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
 wg_packet_tx_worker+0x1c8/0x7e0 drivers/net/wireguard/send.c:276
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 4-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: unexpected response 0

final repro crashed as (corrupted=false):
INFO: task kworker/1:6:6086 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6     state:D
 stack:23656 pid:6086  tgid:6086  ppid:2      task_flags:0x4288060 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7326
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821
 class_mutex_constructor include/linux/mutex.h:253 [inline]
 __input_unregister_device+0x2d8/0x650 drivers/input/input.c:2204
 input_unregister_device+0x9b/0x100 drivers/input/input.c:2438
 usb_cleanup+0x7b/0x1c0 drivers/input/misc/yealink.c:784
 usb_disconnect+0x42/0x70 drivers/input/misc/yealink.c:802
 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:618 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372
 bus_remove_device+0x444/0x560 drivers/base/bus.c:664
 device_del+0x524/0x8f0 drivers/base/core.c:3961
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478
 usb_disconnect+0x346/0x9a0 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1bbb/0x4d30 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Showing all locks held in the system:
9 locks held by kworker/0:1/10:
3 locks held by kworker/u8:1/13:
 #0: 
ffff8880317ed940
 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc90000127c40
 (
(work_completion)(&(&ifa->dad_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffffffff9002cf40
 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x116/0x15c0 net/ipv6/addrconf.c:4229
1 lock held by khungtaskd/32:
 #0: 
ffffffff8eb59c60
 (
rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
6 locks held by kworker/0:2/188:
4 locks held by kworker/u9:1/4935:
 #0: ffff88807a0cc140 ((wq_completion)hci14#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: ffff88807a0cc140 ((wq_completion)hci14#2){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc9000ff6fc40
 (
(work_completion)(&hdev->rx_work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffff8880345500b8
 (
&hdev->lock
){+.+.}-{4:4}
, at: hci_conn_complete_evt+0xba/0x1350 net/bluetooth/hci_event.c:3121
 #3: 
ffff888027a1c890
 (&p->pi_lock
){-.-.}-{2:2}
, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:572 [inline]
, at: try_to_wake_up+0x67/0x14d0 kernel/sched/core.c:4292
4 locks held by udevd/4985:
2 locks held by getty/5372:
 #0: 
ffff8880352f00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: 
ffffc9000322b2e8
 (
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
4 locks held by udevd/5707:
 #0: 
ffff888075e9d3f8
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xa4/0xca0 fs/seq_file.c:183
 #1: 
ffff888071771480 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x5d/0x420 fs/kernfs/file.c:165
 #2: 
ffff888033287e18 (kn->active#28
){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
){.+.+}-{0:0}, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:166
 #3: 
ffff8880217b61d8 (&dev->mutex){....}-{4:4}, at: device_lock_interruptible include/linux/device.h:1107 [inline]
ffff8880217b61d8 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
5 locks held by kworker/u8:2/5746:
5 locks held by kworker/0:3/5789:
2 locks held by kworker/0:4/5812:
1 lock held by syz-executor/5821:
 #0: 
ffffffff8eb5ff68
 (
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961
1 lock held by syz-executor/5830:
 #0: 
ffffffff9002cf40 (
rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:641 [inline]
rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0 drivers/net/tun.c:3506
1 lock held by syz-executor/5832:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:641 [inline]
){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0 drivers/net/tun.c:3506
3 locks held by kworker/u8:7/5843:
 #0: 
ffff88801b064140
 (
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc900033f7c40
 (
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:313
6 locks held by kworker/1:5/5993:
 #0: 
ffff888022abf940 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
ffff888022abf940 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: ffffc90003727c40 ((work_completion)(&hub->events)){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: ffff888029beb1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
 #2: ffff888029beb1d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30 drivers/usb/core/hub.c:5899
 #3: 
ffff88805aae91d8
 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073
 #4: 
ffff8880570701a0 (&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:1102 [inline]
, at: __device_attach+0x88/0x450 drivers/base/dd.c:1073
 #5: 
ffffffff8faa5440
 (
input_mutex
){+.+.}-{4:4}
, at: class_mutex_intr_constructor include/linux/mutex.h:255 [inline]
, at: input_register_device+0xa7f/0x1150 drivers/input/input.c:2394
3 locks held by kworker/0:5/6007:
5 locks held by kworker/0:6/6008:
6 locks held by kworker/1:6/6086:
 #0: ffff888022abf940
 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc9000203fc40
 (
(work_completion)(&hub->events)
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffff8880299931d8
 (
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1102 [inline]
, at: hub_event+0x184/0x4d30 drivers/usb/core/hub.c:5899
 #3: 
ffff88802c30a1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
ffff88802c30a1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0xfc/0x9a0 drivers/usb/core/hub.c:2336
 #4: 
ffff88802b9ab1a0
 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1102 [inline]
 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline]
 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880 drivers/base/dd.c:1369
 #5: ffffffff8faa5440 (
input_mutex
){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
){+.+.}-{4:4}, at: __input_unregister_device+0x2d8/0x650 drivers/input/input.c:2204
4 locks held by udevd/6170:
 #0: ffff8880782391b8 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xa4/0xca0 fs/seq_file.c:183
 #1: 
ffff888056a6ac80
 (
&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x5d/0x420 fs/kernfs/file.c:165
 #2: 
ffff88803449cd28 (kn->active#28){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
ffff88803449cd28 (kn->active#28){.+.+}-{0:0}, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:166
 #3: ffff88802c30a1d8 (&dev->mutex){....}-{4:4}, at: device_lock_interruptible include/linux/device.h:1107 [inline]
 #3: ffff88802c30a1d8 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
3 locks held by kworker/1:7/6184:
 #0: 
ffff88801b02b140
 (
(wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
(wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: ffffc90003607c40 (netdev_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffffc90003607c40 (netdev_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}
, at: netdev_work_proc+0x6f/0x770 net/core/netdev_work.c:116
4 locks held by udevd/6198:
 #0: 
ffff8880257db998
 (
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xa4/0xca0 fs/seq_file.c:183
 #1: 
ffff888070843880 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x5d/0x420 fs/kernfs/file.c:165
 #2: 
ffff8880227cc968 (kn->active#28){.+.+}-{0:0}
, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline]
, at: kernfs_seq_start+0xb2/0x420 fs/kernfs/file.c:166
 #3: 
ffff88805aae91d8
 (
&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:1107 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
1 lock held by syz-executor/6204:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
3 locks held by kworker/1:8/6208:
 #0: 
ffff88801b029d40
 (
(wq_completion)events_power_efficient
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #1: 
ffffc900038d7c40
 (
(reg_check_chans).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3297 [inline]
, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
 #2: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: reg_check_chans_work+0xac/0x1110 net/wireless/reg.c:2469
3 locks held by syz-executor/6212:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
, at: rtnl_newlink+0x8a3/0x1bd0 net/core/rtnetlink.c:4158
 #1: ffff888029b08e70 (&dev_instance_lock_key#23){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2847 [inline]
 #1: ffff888029b08e70 (&dev_instance_lock_key#23){+.+.}-{4:4}, at: netdev_lock_ops include/net/netdev_lock.h:42 [inline]
 #1: ffff888029b08e70 (&dev_instance_lock_key#23){+.+.}-{4:4}, at: do_setlink+0x3d4/0x4670 net/core/rtnetlink.c:3125
 #2: 
ffffffff8eb5ff68
 (
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
2 locks held by syz-executor/6213:
 #0: 
ffffffff9001e388
 (
pernet_ops_rwsem
){++++}-{4:4}
, at: copy_net_ns+0x4e2/0x720 net/core/net_namespace.c:575
 #1: 
ffffffff9002cf40
 (rtnl_mutex){+.+.}-{4:4}, at: register_nexthop_notifier+0x8b/0x290 net/ipv4/nexthop.c:4017
1 lock held by syz-executor/6242:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6248:
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6249:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6257:
 #0: 
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6265:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6266:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6278:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6284:
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6285:
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6295:
 #0: 
ffffffff9002cf40
 (
rtnl_mutex
){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6301:
 #0: 
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6303:
 #0: 
ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}
, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
1 lock held by syz-executor/6322:
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff9002cf40 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0 net/ipv4/devinet.c:978
3 locks held by modprobe/6334:
2 locks held by modprobe/6335:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
 nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
yealink 2-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5703 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/10/2026
Workqueue: wg-crypt-wg2 wg_packet_tx_worker
RIP: 0010:io_serial_out+0x7c/0xc0 drivers/tty/serial/8250/8250_port.c:408
Code: 6a 60 fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 9c fb cd fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d e9 62 39 aa fb cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc90000007350 EFLAGS: 00000002
RAX: 0000000000000020 RBX: 0000000000000020 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00000000000003f8 R08: ffff8881416d0237 R09: 1ffff110282da046
R10: dffffc0000000000 R11: ffffffff85660720 R12: dffffc0000000000
R13: ffffffff9aad70a0 R14: ffffffff9aad70e0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124f54000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562a9449fca8 CR3: 0000000034bf1000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 serial_port_out include/linux/serial_core.h:813 [inline]
 serial8250_console_putchar drivers/tty/serial/8250/8250_port.c:3245 [inline]
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:-1 [inline]
 serial8250_console_write+0x13b6/0x1ba0 drivers/tty/serial/8250/8250_port.c:3385
 console_emit_next_record kernel/printk/printk.c:3183 [inline]
 console_flush_one_record kernel/printk/printk.c:3269 [inline]
 console_flush_all+0x6ea/0xaf0 kernel/printk/printk.c:3343
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413
 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479
 dev_vprintk_emit+0x338/0x400 drivers/base/core.c:4996
 dev_printk_emit+0xee/0x140 drivers/base/core.c:5007
 _dev_err+0x11e/0x180 drivers/base/core.c:5062
 urb_ctl_callback+0x1d1/0x290 drivers/input/misc/yealink.c:447
 __usb_hcd_giveback_urb+0x374/0x530 drivers/usb/core/hcd.c:1657
 dummy_timer+0xac3/0x4b40 drivers/usb/gadget/udc/dummy_hcd.c:2005
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2096
 hrtimer_run_softirq+0x17a/0x240 kernel/time/hrtimer.c:2113
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 do_softirq+0x76/0xd0 kernel/softirq.c:523
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
 wg_socket_send_skb_to_peer+0x16b/0x1d0 drivers/net/wireguard/socket.c:183
 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
 wg_packet_tx_worker+0x1c8/0x7e0 drivers/net/wireguard/send.c:276
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 4-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 4-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: unexpected response 0