INFO: task kworker/0:4:5240 blocked for more than 143 seconds.
      Not tainted 6.13.0-rc7-syzkaller-g70cd0576aa39 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4     state:D
 stack:20736 pid:5240  tgid:5240  ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event

Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x102c/0x34b0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
 __mutex_lock_common kernel/locking/mutex.c:665 [inline]
 __mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
 unregister_netdev+0x12/0x30 net/core/dev.c:11626
 usbnet_disconnect+0x109/0x500 drivers/net/usb/usbnet.c:1637
 usb_unbind_interface+0x1e2/0x960 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 device_remove+0x122/0x170 drivers/base/dd.c:561
 __device_release_driver drivers/base/dd.c:1273 [inline]
 device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296
 bus_remove_device+0x22f/0x420 drivers/base/bus.c:576
 device_del+0x396/0x9f0 drivers/base/core.c:3854
 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418
 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2305
 hub_port_connect drivers/usb/core/hub.c:5363 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5663 [inline]
 port_event drivers/usb/core/hub.c:5823 [inline]
 hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5905
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3317 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Showing all locks held in the system:
6 locks held by kworker/0:1/9:
 #0: 
ffff888106ebcd48
 (
(wq_completion)usb_hub_wq){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
 #1: 
ffffc9000009fd80 ((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
 #2: ffff88810bb27190 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5851
 #3: ffff88810cb2c190
 (&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
){....}-{4:4}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #4: ffff88812a141160
 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #5: ffffffff8a19e648 (rtnl_mutex
){+.+.}-{4:4}
, at: register_netdev+0x13/0x50 net/core/dev.c:10753
3 locks held by kworker/u8:0/11:
 #0: 
ffff888111b37148
 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
 #1: 
ffffc900000bfd80
 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
 #2: 
ffffffff8a19e648
 (rtnl_mutex
){+.+.}-{4:4}
, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4755
1 lock held by khungtaskd/30:
 #0: 
ffffffff88ebc880
 (rcu_read_lock
){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
6 locks held by kworker/1:1/36:
 #0: 
ffff888106ebcd48 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
 #1: ffffc90000267d80
 ((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
 #2: ffff88810b7d7190
 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5851
 #3: ffff88813be94190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
 #3: ffff88813be94190 (&dev->mutex){....}-{4:4}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #4: 
ffff88812855b160
 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #5: ffffffff8a19e648
 (rtnl_mutex){+.+.}-{4:4}
, at: register_netdev+0x13/0x50 net/core/dev.c:10753
3 locks held by dhcpcd/2884:
2 locks held by getty/2904:
 #0: ffff88810872e0a0 (&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000432f0
 (&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
3 locks held by syz-executor/2950:
4 locks held by udevd/5207:
 #0: ffff8881215fe0a0 (&p->lock){+.+.}-{4:4}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
 #1: ffff88811941a888
 (
&of->mutex#2){+.+.}-{4:4}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
 #2: ffff888119f53698
 (kn->active
#4
){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
 #3: ffff88811a9e6160
 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2729
4 locks held by udevd/5235:
 #0: 
ffff88811a420418
 (
&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
 #1: ffff88813e2a1488
 (&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
 #2: ffff888131a560f8
 (kn->active
#4){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
 #3: ffff88813be94190 (&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2729
6 locks held by kworker/0:4/5240:
 #0: ffff888106ebcd48
 ((wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
 #1: 
ffffc9000200fd80
 ((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
 #2: ffff88810b3bf190 (&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
){....}-{4:4}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5851
 #3: ffff88813e64d190
 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2296
 #4: ffff8881380d8160
 (&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
){....}-{4:4}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293
 #5: 
ffffffff8a19e648
 (rtnl_mutex){+.+.}-{4:4}, at: unregister_netdev+0x12/0x30 net/core/dev.c:11626
6 locks held by kworker/1:5/5308:
 #0: ffff888106ebcd48
 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
 #1: ffffc9000219fd80
 ((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
 #2: ffff88810b378190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
 #2: ffff88810b378190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5851
 #3: 
ffff888114966190
 (&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #4: 
ffff88811a9e6160
 (&dev->mutex
){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
){....}-{4:4}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #5: 
ffffffff8a19e648
 (
rtnl_mutex
){+.+.}-{4:4}, at: register_netdev+0x13/0x50 net/core/dev.c:10753
4 locks held by udevd/5537:
 #0: ffff88811dabec30 (&p->lock){+.+.}-{4:4}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
 #1: ffff8881131ccc88
 (&of->mutex
#2
){+.+.}-{4:4}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
 #2: ffff88810b704c38
 (kn->active
#4){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
 #3: 
ffff88810bb27190
 (&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:1014 [inline]
, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2729
3 locks held by kworker/1:6/11116:
 #0: ffff888100081948 ((wq_completion)events_power_efficient
){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
 #1: ffffc900053bfd80
 ((reg_check_chans).work
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
 #2: ffffffff8a19e648 (
rtnl_mutex){+.+.}-{4:4}
, at: reg_check_chans_work+0x84/0x1130 net/wireless/reg.c:2480
6 locks held by kworker/0:3/14549:
1 lock held by syz.7.2734/15816:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc7-syzkaller-g70cd0576aa39 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
 watchdog+0xf14/0x1240 kernel/hung_task.c:397
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2884 Comm: dhcpcd Not tainted 6.13.0-rc7-syzkaller-g70cd0576aa39 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:write_comp_data+0x42/0x90 kernel/kcov.c:246
Code: a9 00 01 ff 00 74 1d f6 c4 01 74 67 a9 00 00 0f 00 75 60 a9 00 00 f0 00 75 59 8b 82 54 15 00 00 85 c0 74 4f 8b 82 30 15 00 00 <83> f8 03 75 44 48 8b 82 38 15 00 00 8b 92 34 15 00 00 48 8b 38 48
RSP: 0018:ffffc9000178eb80 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff86eece80
RDX: ffff8881153d0000 RSI: 000000000000000a RDI: 0000000000000001
RBP: ffffffff88111e80 R08: 0000000000000001 R09: 000000000000000a
R10: 000000000000000f R11: 00000000008126e0 R12: 000000000000000f
R13: 0000000000000001 R14: 000000000000000a R15: 000000000000000f
FS:  00007eff11de7740(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd4bd319160 CR3: 0000000114e7a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __sanitizer_cov_trace_switch+0x54/0x90 kernel/kcov.c:351
 vsnprintf+0x740/0x1880 lib/vsprintf.c:2817
 snprintf+0xc8/0x100 lib/vsprintf.c:2983
 print_caller kernel/printk/printk.c:1390 [inline]
 info_print_prefix+0x135/0x350 kernel/printk/printk.c:1409
 record_print_text+0x141/0x400 kernel/printk/printk.c:1456
 printk_get_next_message+0x2be/0x690 kernel/printk/printk.c:3008
 console_emit_next_record kernel/printk/printk.c:3076 [inline]
 console_flush_all+0x6ec/0xc60 kernel/printk/printk.c:3210
 __console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
 console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
 vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
 dev_vprintk_emit drivers/base/core.c:4935 [inline]
 dev_printk_emit+0xfb/0x140 drivers/base/core.c:4946
 __netdev_printk+0x1f7/0x500 net/core/dev.c:11957
 netdev_err+0xe5/0x120 net/core/dev.c:12009
 asix_set_sw_mii drivers/net/usb/asix_common.c:78 [inline]
 asix_check_host_enable+0x190/0x240 drivers/net/usb/asix_common.c:98
 __asix_mdio_read+0xa3/0x270 drivers/net/usb/asix_common.c:506
 asix_phy_reset+0x106/0x1f0 drivers/net/usb/asix_devices.c:215
 ax88178_reset+0x42e/0x12f0 drivers/net/usb/asix_devices.c:1126
 usbnet_open+0xcc/0xbf0 drivers/net/usb/usbnet.c:899
 __dev_open+0x2d4/0x4e0 net/core/dev.c:1506
 __dev_change_flags+0x561/0x720 net/core/dev.c:8968
 dev_change_flags+0x8f/0x160 net/core/dev.c:9040
 devinet_ioctl+0x11d9/0x1f50 net/ipv4/devinet.c:1208
 inet_ioctl+0x3aa/0x3f0 net/ipv4/af_inet.c:1001
 sock_do_ioctl+0x116/0x280 net/socket.c:1209
 sock_ioctl+0x41c/0x690 net/socket.c:1328
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7eff11eb5d49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffd29add9d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007eff11de76c0 RCX: 00007eff11eb5d49
RDX: 00007ffd29aedbc8 RSI: 0000000000008914 RDI: 0000000000000005
RBP: 00007ffd29afdd88 R08: 00007ffd29aedb88 R09: 00007ffd29aedb38
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd29aedbc8 R14: 0000000000000028 R15: 0000000000008914
 </TASK>