INFO: task hwrng:759 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:hwrng           state:D stack:27568 pid:759   tgid:759   ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 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+0x6a4/0xd70 kernel/locking/mutex.c:752
 hwrng_fillfn+0xf0/0x3c0 drivers/char/hw_random/core.c:495
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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:
7 locks held by kworker/0:0/8:
3 locks held by kworker/0:1/9:
1 lock held by khungtaskd/30:
 #0: 
ffffffff8e333f20
 (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+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:2/35:
 #0: ffff888015089148 ((wq_completion)events_unbound
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: 
ffffc90000ab7d00
 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 ((reaper_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
2 locks held by kworker/0:2/58:
7 locks held by kworker/u8:5/65:
 #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: 
ffffc900020afd00
 (
net_cleanup_work
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffffffff8f5ddf10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594
 #3: ffff88802a1080e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
 #3: ffff88802a1080e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
 #3: ffff88802a1080e8 (&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x13b/0x440 net/devlink/core.c:506
 #4: ffff88802a109250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline]
 #4: ffff88802a109250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
 #4: ffff88802a109250 (&devlink->lock_key#4){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x14d/0x440 net/devlink/core.c:506
 #5: 
ffffffff8f5ea748
 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:773
 #6: ffffffff8e1ce5b0
 (
cpu_hotplug_lock
){++++}-{0:0}
, at: flush_all_backlogs net/core/dev.c:5984 [inline]
, at: unregister_netdevice_many_notify+0x607/0x16b0 net/core/dev.c:11201
1 lock held by hwrng/759:
 #0: 
ffffffff8eb36d88
 (
reading_mutex
){+.+.}-{3:3}
, at: hwrng_fillfn+0xf0/0x3c0 drivers/char/hw_random/core.c:495
2 locks held by kworker/u8:6/1043:
 #0: 
ffff888015089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
ffff888015089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: 
ffffc90004717d00
 (
connector_reaper_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
connector_reaper_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
2 locks held by dhcpcd/4755:
 #0: 
ffffffff8f5cf8c8 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x664/0x8e0 net/socket.c:1303
 #1: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0x112/0x9d0 net/8021q/vlan.c:553
2 locks held by getty/4850:
 #0: 
ffff88802f11a0a0
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031332f0
 (
&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
4 locks held by udevd/5114:
 #0: ffff888028df7e80
 (
&p->lock
){+.+.}-{3:3}
, at: seq_read_iter+0xb7/0xd60 fs/seq_file.c:182
 #1: 
ffff88805e2c3888
 (
&of->mutex
#2
){+.+.}-{3:3}
, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
 #2: ffff88806d202e18
 (kn->active#21){.+.+}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
 #3: ffff888067455190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:1014 [inline]
 #3: ffff888067455190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
3 locks held by kworker/0:4/5147:
2 locks held by kworker/0:5/5150:
2 locks held by kworker/0:8/5161:
1 lock held by syz.2.82/5454:
3 locks held by kworker/u8:8/5460:
 #0: 
ffff88802a810148
 (
(wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
(wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc90009837d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc90009837d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: 
ffffffff8f5ea748
 (
rtnl_mutex
){+.+.}-{3:3}
, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4733
1 lock held by syz-executor/5480:
 #0: 
ffffffff8f5ea748
 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500
1 lock held by syz-executor/5487:
 #0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
2 locks held by syz-executor/5560:
 #0: ffffffff8f5ddf10
 (
pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: 
ffffffff8f5ea748
 (
rtnl_mutex
){+.+.}-{3:3}
, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159
2 locks held by syz-executor/5563:
 #0: 
ffffffff8f5ddf10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: ffffffff8f5ea748
 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159
2 locks held by syz-executor/5567:
 #0: ffffffff8f5ddf10
 (
pernet_ops_rwsem){++++}-{3:3}
, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: 
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159
2 locks held by syz-executor/5569:
 #0: ffffffff8f5ddf10
 (
pernet_ops_rwsem
){++++}-{3:3}
, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x20e/0x710 net/ipv4/ip_tunnel.c:1159
2 locks held by syz-executor/5574:
 #0: ffffffff8f5ddf10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: 
ffffffff8f5ea748
 (
rtnl_mutex){+.+.}-{3:3}
, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871
2 locks held by syz-executor/5579:
 #0: ffffffff8f5ddf10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: ffffffff8f5ea748
 (
rtnl_mutex
){+.+.}-{3:3}
, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871
2 locks held by syz-executor/5580:
 #0: 
ffffffff8f5ddf10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871
2 locks held by syz-executor/5585:
 #0: ffffffff8f5ddf10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871
2 locks held by syz-executor/5586:
 #0: 
ffffffff8f5ddf10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
 #1: 
ffffffff8f5ea748
 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3871

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

NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #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+0x241/0x360 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfde/0x1020 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
NMI backtrace for cpu 0
CPU: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: events_power_efficient neigh_periodic_work
RIP: 0010:preempt_count_add+0x2d/0x190 kernel/sched/core.c:5865
Code: fa 41 57 41 56 53 89 fb 48 c7 c0 e0 56 7a 94 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 ed 00 00 00 <83> 3d 3c ba 14 13 00 75 07 65 8b 05 1b 38 9e 7e 65 01 1d 14 38 9e
RSP: 0018:ffffc90000006440 EFLAGS: 00000097
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff947a5603
RDX: 0000000080010103 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc900000064f0 R08: ffffffff853bf72f R09: 1ffffffff25f5ab0
R10: dffffc0000000000 R11: ffffffff853b0b00 R12: 0000000000000046
R13: 1ffff92000000c8c R14: ffffffff94ad2ea0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000d000 CR3: 000000002b514000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:109 [inline]
 _raw_spin_lock_irqsave+0xba/0x120 kernel/locking/spinlock.c:162
 uart_port_lock_irqsave include/linux/serial_core.h:618 [inline]
 serial8250_console_write+0x1a8/0x1770 drivers/tty/serial/8250/8250_port.c:3352
 console_emit_next_record kernel/printk/printk.c:2913 [inline]
 console_flush_all+0x865/0xfd0 kernel/printk/printk.c:2979
 console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048
 vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348
 dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4909
 dev_printk_emit+0xdd/0x120 drivers/base/core.c:4920
 _dev_err+0x122/0x170 drivers/base/core.c:4975
 urb_ctl_callback+0x1d3/0x290 drivers/input/misc/yealink.c:454
 __usb_hcd_giveback_urb+0x42c/0x6e0 drivers/usb/core/hcd.c:1650
 dummy_timer+0x830/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 be c4 6a f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> a3 74 d4 f5 65 8b 05 54 ab 72 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc90000007580 EFLAGS: 00000206
RAX: 1602ee04fa2d8000 RBX: 1ffff92000000eb4 RCX: ffffffff8172daca
RDX: dffffc0000000000 RSI: ffffffff8bcabb40 RDI: 0000000000000001
RBP: ffffc90000007620 R08: ffffffff92fad66f R09: 1ffffffff25f5acd
R10: dffffc0000000000 R11: fffffbfff25f5ace R12: dffffc0000000000
R13: 1ffff92000000eb0 R14: ffffc900000075a0 R15: 0000000000000246
 stack_depot_save_flags+0x6e4/0x830 lib/stackdepot.c:662
 kasan_save_stack mm/kasan/common.c:48 [inline]
 kasan_save_track+0x51/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4045
 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:656
 __netdev_alloc_skb+0x105/0x560 net/core/skbuff.c:730
 netdev_alloc_skb include/linux/skbuff.h:3319 [inline]
 dev_alloc_skb include/linux/skbuff.h:3332 [inline]
 hsr_init_skb+0xe1/0x550 net/hsr/hsr_device.c:255
 send_hsr_supervision_frame+0x148/0xce0 net/hsr/hsr_device.c:299
 hsr_announce+0x1a9/0x370 net/hsr/hsr_device.c:399
 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792
 expire_timers kernel/time/timer.c:1843 [inline]
 __run_timers kernel/time/timer.c:2417 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428
 run_timer_base kernel/time/timer.c:2437 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 neigh_periodic_work+0xb35/0xd50 net/core/neighbour.c:1019
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71
yealink 2-1:36.0: urb_irq_callback - urb status -71
yealink 2-1:36.0: unexpected response 0
yealink 2-1:36.0: urb_ctl_callback - urb status -71