INFO: task udevd:2400 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc6-syzkaller-00119-gb72749301112 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D
 stack:24880 pid:2400  tgid:2400  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xcda/0x31b0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0x124/0x330 kernel/locking/rwsem.c:1528
 kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
 d_revalidate fs/namei.c:861 [inline]
 d_revalidate fs/namei.c:858 [inline]
 lookup_fast+0x239/0x540 fs/namei.c:1653
 walk_component+0x5b/0x5b0 fs/namei.c:2000
 link_path_walk.part.0.constprop.0+0x77f/0xcd0 fs/namei.c:2331
 link_path_walk fs/namei.c:2255 [inline]
 path_lookupat+0x93/0x770 fs/namei.c:2492
 filename_lookup+0x1e5/0x5b0 fs/namei.c:2522
 vfs_statx+0x13e/0x550 fs/stat.c:244
 vfs_fstatat+0xb3/0x150 fs/stat.c:304
 __do_sys_newfstatat+0xa6/0x130 fs/stat.c:468
 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: 0033:0x7f404ed135f4
RSP: 002b:00007ffea4c5ce18 EFLAGS: 00000246
 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055e242317f30 RCX: 00007f404ed135f4
RDX: 00007ffea4c5ce28 RSI: 00007ffea4c5d2b8 RDI: 00000000ffffff9c
RBP: 00007ffea4c5ceb8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffea4c5d2b8
R13: 00007ffea4c5ce28 R14: 000055e2422e1910 R15: 0000000000000000
 </TASK>
INFO: task udevd:4803 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc6-syzkaller-00119-gb72749301112 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D
 stack:25552 pid:4803  tgid:4803  ppid:2400   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xcda/0x31b0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
 device_lock include/linux/device.h:1009 [inline]
 uevent_show+0x188/0x3b0 drivers/base/core.c:2743
 dev_attr_show+0x53/0xe0 drivers/base/core.c:2437
 sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
 seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230
 kernfs_fop_read_iter+0x41a/0x590 fs/kernfs/file.c:279
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x869/0xbd0 fs/read_write.c:476
 ksys_read+0x12f/0x260 fs/read_write.c:619
 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: 0033:0x7f404ed13b6a
RSP: 002b:00007ffea4c54b68 EFLAGS: 00000246
 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055e242300fa0 RCX: 00007f404ed13b6a
RDX: 0000000000001000 RSI: 000055e24230eac0 RDI: 0000000000000008
RBP: 000055e242300fa0 R08: 0000000000000008 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffea4c55048 R15: 000000000000000a
 </TASK>
INFO: task syz.0.150:5167 blocked for more than 144 seconds.
      Not tainted 6.10.0-rc6-syzkaller-00119-gb72749301112 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.150       state:D
 stack:27888 pid:5167  tgid:5166  ppid:2506   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xcda/0x31b0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
 __down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306
 kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
 sysfs_remove_file include/linux/sysfs.h:773 [inline]
 driver_remove_file drivers/base/driver.c:198 [inline]
 driver_remove_file+0x4a/0x60 drivers/base/driver.c:194
 remove_bind_files drivers/base/bus.c:600 [inline]
 bus_remove_driver+0x224/0x2c0 drivers/base/bus.c:738
 driver_unregister+0x76/0xb0 drivers/base/driver.c:274
 usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1733
 raw_release+0x1a9/0x2f0 drivers/usb/gadget/legacy/raw_gadget.c:462
 __fput+0x408/0xbb0 fs/file_table.c:422
 task_work_run+0x14e/0x250 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa9b/0x2b20 kernel/exit.c:874
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1023
 get_signal+0x2616/0x2710 kernel/signal.c:2909
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x141/0x250 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f51620f57db
RSP: 002b:00007f5161374f20 EFLAGS: 00000246
 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007f51620f57db
RDX: 00007f5161375ff0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007f5161375ff0 R08: 0000000000000010 R09: 00302e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000020000140 R15: 00007f516216caf2
 </TASK>

Showing all locks held in the system:
5 locks held by kworker/0:0/8:
1 lock held by khungtaskd/30:
 #0: 
ffffffff886b4360
 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
7 locks held by kworker/0:2/733:
1 lock held by udevd/2400:
 #0: ffff888100aae948
 (
&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
2 locks held by getty/2460:
 #0: 
ffff88810e3c40a0 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000432f0
 (
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/2503:
 #0: 
ffff888100aae948 (
&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0x39e/0x5a0 fs/kernfs/dir.c:1141
1 lock held by syz-executor/2506:
 #0: 
ffff888100aae948 (
&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0x39e/0x5a0 fs/kernfs/dir.c:1141
1 lock held by syz-executor/2507:
 #0: 
ffff888100aae948
 (&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0x39e/0x5a0 fs/kernfs/dir.c:1141
1 lock held by syz-executor/2510:
 #0: ffff888100aae948
 (
&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0x39e/0x5a0 fs/kernfs/dir.c:1141
1 lock held by syz-executor/2511:
 #0: 
ffffffff886bfaf8 (
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:291
5 locks held by kworker/0:3/4787:
4 locks held by udevd/4803:
 #0: 
ffff8881162a3790
 (
&p->lock
){+.+.}-{3:3}
, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
 #1: 
ffff888113c14088
 (&of->mutex
){+.+.}-{3:3}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
 #2: ffff8881127601e8
 (kn->active
){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
 #3: ffff88811037d190
 (
&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
3 locks held by kworker/0:4/4804:
5 locks held by kworker/0:5/4816:
 #0: ffff888104ab4948
 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223
 #1: 
ffffc9000a5cfd80 (
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224
 #2: ffff888109735190
 (
&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
 #3: 
ffff888111714190
 (&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1003
 #4: ffff888100aae948
 (
&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
6 locks held by kworker/1:4/4857:
 #0: 
ffff888104ab4948 (
(wq_completion)usb_hub_wq
){+.+.}-{0:0}
, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223
 #1: ffffc9000af6fd80
 (
(work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224
 #2: 
ffff888109b3d190
 (&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
 #3: ffff88811a765190
 (
&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295
 #4: 
ffff88811ac62160
 (&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: __device_driver_lock drivers/base/dd.c:1093 [inline]
, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1290
 #5: ffff888100aae948
 (&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_remove_by_name_ns+0x87/0x130 fs/kernfs/dir.c:1689
1 lock held by syz-executor/5177:
 #0: 
ffff888100aae948
 (
&root->kernfs_rwsem){++++}-{3:3}
, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by syz-executor/5178:
 #0: ffff888100aae948
 (
&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by syz-executor/5179:
 #0: 
ffff888100aae948 (
&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by syz-executor/5180:
 #0: 
ffff888100aae948
 (&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159
1 lock held by syz-executor/5181:
 #0: ffff888100aae948
 (
&root->kernfs_rwsem
){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159

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

NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc6-syzkaller-00119-gb72749301112 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 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:223 [inline]
 watchdog+0xf86/0x1240 kernel/hung_task.c:379
 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 1 to CPUs 0:
yealink 1-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 0
CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.10.0-rc6-syzkaller-00119-gb72749301112 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: events_power_efficient gc_worker
RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:413
Code: 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1c 66 03 5d 40 44 89 e8 89 da ee <5b> 5d 41 5c 41 5d c3 cc cc cc cc e8 c1 90 0b ff eb a0 e8 4a 91 0b
RSP: 0018:ffffc900000075c0 EFLAGS: 00000002
RAX: 0000000000000020 RBX: 00000000000003f8 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: ffffffff829c3035 RDI: ffffffff8d72f9e0
RBP: ffffffff8d72f9a0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000005 R12: 0000000000000000
R13: 0000000000000020 R14: ffffffff829c2fd0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30811ff8 CR3: 0000000115ec4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 serial_out drivers/tty/serial/8250/8250.h:122 [inline]
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3322 [inline]
 serial8250_console_write+0xce7/0x1090 drivers/tty/serial/8250/8250_port.c:3393
 console_emit_next_record kernel/printk/printk.c:2913 [inline]
 console_flush_all+0x53c/0xd70 kernel/printk/printk.c:2979
 console_unlock+0xae/0x290 kernel/printk/printk.c:3048
 vprintk_emit kernel/printk/printk.c:2348 [inline]
 vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2303
 dev_vprintk_emit drivers/base/core.c:4909 [inline]
 dev_printk_emit+0xfb/0x140 drivers/base/core.c:4920
 __dev_printk+0xf5/0x270 drivers/base/core.c:4932
 _dev_err+0xe5/0x120 drivers/base/core.c:4975
 urb_ctl_callback+0x1eb/0x2f0 drivers/input/misc/yealink.c:454
 __usb_hcd_giveback_urb+0x466/0x6e0 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
 dummy_timer+0x17c3/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x8b/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__schedule+0xce2/0x31b0 kernel/sched/core.c:6616
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 22 1b 00 00 4c 89 e7 4c 89 73 10 4c 89 f6 e8 16 14 6b fa 48 89 c7 e8 be a6 91 fa <48> 8b 9d e8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7
RSP: 0018:ffffc9000008fa60 EFLAGS: 00000202
RAX: 000000000016ae1f RBX: ffff8881f643d880 RCX: 1ffffffff199f914
RDX: 0000000000000000 RSI: ffffffff86c7d680 RDI: ffffffff86e78a80
RBP: ffffc9000008fb88 R08: 0000000000000001 R09: fffffbfff199a9a8
R10: ffffffff8ccd4d47 R11: 0000000000000002 R12: 0000000000000000
R13: ffff8881f643e308 R14: ffff888101695700 R15: ffff8881016959b0
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6924
 __cond_resched+0x1b/0x30 kernel/sched/core.c:8589
 _cond_resched include/linux/sched.h:1992 [inline]
 gc_worker+0xa52/0x1770 net/netfilter/nf_conntrack_core.c:1564
 process_one_work+0x9c5/0x1b40 kernel/workqueue.c:3248
 process_scheduled_works kernel/workqueue.c:3329 [inline]
 worker_thread+0x6c8/0xf30 kernel/workqueue.c:3409
 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>