INFO: task syz-executor:14399 blocked for more than 143 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:26760 pid:14399 tgid:14399 ppid:1      task_flags:0x40054c flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0xc3/0x2c0
 wait_for_completion+0x2cc/0x5e0
 __synchronize_srcu+0x249/0x300
 hci_unregister_dev+0x148/0x5a0
 vhci_release+0x152/0x1a0
 __fput+0x44f/0xa60
 task_work_run+0x1d9/0x270
 do_exit+0x70f/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f64b5b5d60e
RSP: 002b:00007ffd9d232cb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 000000000000002c RBX: 00005555790ad500 RCX: 00007f64b5b5d60e
RDX: 000000000000002c RSI: 00007f64b6944670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffd9d232d34 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f64b6944670 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:14400 blocked for more than 143 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:26704 pid:14400 tgid:14400 ppid:1      task_flags:0x40054c flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0xc3/0x2c0
 wait_for_completion+0x2cc/0x5e0
 __synchronize_srcu+0x249/0x300
 hci_unregister_dev+0x148/0x5a0
 vhci_release+0x152/0x1a0
 __fput+0x44f/0xa60
 task_work_run+0x1d9/0x270
 do_exit+0x70f/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc01615d60e
RSP: 002b:00007fff98fbac58 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 000000000000002c RBX: 00005555862a6500 RCX: 00007fc01615d60e
RDX: 000000000000002c RSI: 00007fc016f44670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fff98fbacd4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fc016f44670 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:14408 blocked for more than 143 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:26240 pid:14408 tgid:14408 ppid:1      task_flags:0x40054c flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0xc3/0x2c0
 wait_for_completion+0x2cc/0x5e0
 __synchronize_srcu+0x249/0x300
 hci_unregister_dev+0x148/0x5a0
 vhci_release+0x152/0x1a0
 __fput+0x44f/0xa60
 task_work_run+0x1d9/0x270
 do_exit+0x70f/0x22c0
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd7e935d60e
RSP: 002b:00007ffe85a154e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: 000000000000002c RBX: 0000555588258500 RCX: 00007fd7e935d60e
RDX: 000000000000002c RSI: 00007fd7ea144670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffe85a15564 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fd7ea144670 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/0:0/9:
3 locks held by kworker/u8:0/12:
 #0: ffff88816b413140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90000117c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x11e/0x14c0
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by kworker/0:2/799:
3 locks held by kworker/u10:6/1115:
 #0: ffff8881000a4140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90007237c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
2 locks held by kworker/0:3/5068:
1 lock held by dhcpcd/5347:
 #0: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x883/0x1bb0
2 locks held by getty/5430:
 #0: ffff888111ddc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
2 locks held by kworker/0:4/5606:
3 locks held by kworker/0:6/5684:
2 locks held by kworker/0:7/6696:
2 locks held by kworker/0:8/6697:
3 locks held by kworker/0:9/6698:
3 locks held by kworker/0:10/6724:
5 locks held by kworker/0:11/6725:
2 locks held by kworker/0:12/6726:
2 locks held by kworker/0:14/6728:
6 locks held by kworker/u8:4/13932:
 #0: ffff8881012ad940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90007c57c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdc0ae8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800
 #3: ffff88810cbc4128 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x129/0x420
 #4: ffff888114b89258 (&devlink->lock_key#4){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x142/0x420
 #5: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: unregister_nexthop_notifier+0x17/0x40
8 locks held by syz-executor/14527:
 #0: ffff8881137a0410 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x227/0xb90
 #1: ffff888193414080 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540
 #2: ffff8881607393c8 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540
 #3: ffffffff8f64ee40 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd7/0x370
 #4: ffff888115756128 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x870
 #5: ffff888115755258 (&devlink->lock_key#3){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x170
 #6: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: nsim_destroy+0x13a/0x830
 #7: ffffffff8e7eb750 (cpu_hotplug_lock){++++}-{0:0}, at: unregister_netdevice_many_notify+0xc7f/0x22c0
1 lock held by syz-executor/14617:
 #0: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x883/0x1bb0
2 locks held by syz-executor/14629:
 #0: ffffffff9030ec40 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250
 #1: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x883/0x1bb0
1 lock held by syz-executor/14696:
 #0: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/14704:
 #0: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/14709:
 #0: ffffffff8fdcf7c0 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6725 Comm: kworker/0:11 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: wg-kex-wg0 wg_packet_handshake_receive_worker
RIP: 0010:rcu_is_watching+0x55/0xb0
Code: 47 26 8e 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 5c 23 86 00 48 c7 c3 d8 39 3a 93 49 03 1e 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 89 28 8e 11 74 11 83 e0
RSP: 0018:ffffc90000007198 EFLAGS: 00000802
RAX: 1ffff1102420673b RBX: ffff8881210339d8 RCX: 0000000000000103
RDX: 0000000000000000 RSI: ffffffff8c28adc0 RDI: ffffffff8c28ad80
RBP: 0000000000000000 R08: ffffffff9030a9f7 R09: 1ffffffff206153e
R10: dffffc0000000000 R11: fffffbfff206153f R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8e264790 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88818dc90000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe9312fac0 CR3: 000000000e74a000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 trace_irq_disable+0x3b/0x140
 irqentry_enter+0xac/0x130
 sysvec_apic_timer_interrupt+0xe/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80
Code: f7 e8 ad 65 f7 f5 f7 c3 00 02 00 00 74 05 e8 b0 fb 22 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 24 e8 e8 f5 65 8b 05 ed 10 8e 07 85 c0 74 18 5b 41 5e e9 51 48
RSP: 0018:ffffc900000072b8 EFLAGS: 00000206
RAX: 0000000000000012 RBX: 0000000000000292 RCX: 0000000000000102
RDX: 0000000000000002 RSI: ffffffff8dfa5bcd RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff9030a9f7 R09: 1ffffffff206153e
R10: dffffc0000000000 R11: fffffbfff206153f R12: ffff8881af0749b0
R13: ffff8881af0748c0 R14: ffffffff9a6e2120 R15: 0000000000000001
 debug_check_no_obj_freed+0x52e/0x550
 kmem_cache_free+0xfd/0x650
 nft_synproxy_eval_v4+0x352/0x4e0
 nft_synproxy_do_eval+0x305/0x580
 nft_do_chain+0x467/0x19f0
 nft_do_chain_inet+0x360/0x4b0
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x21f/0x3c0
 NF_HOOK+0x336/0x3c0
 process_backlog+0xaa3/0x1950
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__schedule+0x17bc/0x5680
Code: d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 fa c7 87 f6 4c 89 23 4c 89 ef 4c 89 e6 e8 3c 0c 8a f5 48 89 c7 e8 b4 bc eb f5 <31> ff 4d 39 e5 40 0f 95 c7 e8 96 c8 eb f5 48 8b 84 24 00 01 00 00
RSP: 0018:ffffc9000c007540 EFLAGS: 00000206
RAX: 000000000071fea9 RBX: ffff88812103ae88 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa5bcd RDI: ffffffff8c28ade0
RBP: ffffc9000c007750 R08: ffffffff9030a9f7 R09: 1ffffffff206153e
R10: dffffc0000000000 R11: fffffbfff206153f R12: ffff888119328000
R13: ffff888119328000 R14: dffffc0000000000 R15: ffff88812103b9f8
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x730
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:wg_packet_handshake_receive_worker+0x101e/0x10c0
Code: 4c 8b 7c 24 38 48 8b 5c 24 28 e9 99 fa ff ff e8 f8 c0 4e fb 48 8b 7c 24 68 e8 5e f1 33 05 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <48> 8b 44 24 48 4a c7 04 20 00 00 00 00 4a c7 44 20 08 00 00 00 00
RSP: 0018:ffffc9000c007880 EFLAGS: 00000286
RAX: 0000000080000000 RBX: ffff88811ea30280 RCX: 0000000000000046
RDX: 0000000000000006 RSI: ffffffff8dfa5bcd RDI: ffffffff8c28ade0
RBP: ffffc9000c007ad0 R08: ffffffff9030a9f7 R09: 1ffffffff206153e
R10: dffffc0000000000 R11: fffffbfff206153f R12: dffffc0000000000
R13: 0000000000000050 R14: 0000000000001000 R15: ffff88811e9f1288
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
