------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd3f/0x1040, CPU#1: kworker/u8:2/24337
Modules linked in:
CPU: 1 UID: 0 PID: 24337 Comm: kworker/u8:2 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: netns cleanup_net
RIP: 0010:__queue_work+0xd67/0x1040
Code: a6 0e 49 8d 7d 18 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 ea c2 a3 00 49 8b 75 18 49 81 c7 70 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef
RSP: 0018:ffffc90000a08bd8 EFLAGS: 00010082
RAX: 1ffff11022fcf14e RBX: 0000000000000008 RCX: ffff888109c6bb00
RDX: ffff888116704170 RSI: ffffffff8a9c7100 RDI: ffffffff9033d250
RBP: 0000000000000100 R08: ffffffff9030d3f7 R09: 1ffffffff2061a7e
R10: dffffc0000000000 R11: ffffffff818d48b0 R12: dffffc0000000000
R13: ffff888117e78a58 R14: ffffffff9033d250 R15: ffff888116704170
FS:  0000000000000000(0000) GS:ffff8882a9289000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff94a816038 CR3: 0000000168bd6000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x67e/0x8b0
 run_timer_softirq+0xb7/0x170
 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:finish_task_switch+0x427/0xbe0
Code: 41 c7 84 24 e0 0d 00 00 00 00 00 00 0f 1f 44 00 00 49 83 c4 48 4c 89 e7 e8 16 f8 16 0a e8 f1 fa 38 00 fb 49 8d bd b0 16 00 00 <48> 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 7b 03 00 00 41 80
RSP: 0018:ffffc900069cecd0 EFLAGS: 00000202
RAX: 0000000000142e31 RBX: 1ffff110478c7784 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfacd5d RDI: ffff888109c6d1b0
RBP: ffffc900069ced30 R08: ffffffff9030d3f7 R09: 1ffffffff2061a7e
R10: dffffc0000000000 R11: fffffbfff2061a7f R12: ffff88823c63ae88
R13: ffff888109c6bb00 R14: ffff888115df1d80 R15: dffffc0000000000
 __schedule+0x1829/0x5740
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x760
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x221/0x350
Code: ff ff ff e8 f1 8d 07 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 db b8 97 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 40 81 0a 0a cc 48 8d 3d 88 7a 92
RSP: 0018:ffffc900069cf080 EFLAGS: 00000282
RAX: d3b3b46bcf16e300 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 000000006680f7ee RSI: ffffffff8e220388 RDI: ffffffff8c28b660
RBP: ffffffff826ff65c R08: ffffffff826ff65c R09: ffffffff8e95cca0
R10: dffffc0000000000 R11: ffffed1020256937 R12: 0000000000000002
R13: ffffffff8e95cca0 R14: 0000000000000000 R15: 0000000000000246
 kernfs_root+0x38/0x230
 __kernfs_remove+0x67e/0x8e0
 kernfs_remove_by_name_ns+0xc0/0x140
 sysfs_remove_group+0xfc/0x2e0
 sysfs_remove_groups+0x54/0xb0
 device_remove_attrs+0x229/0x280
 device_del+0x51f/0x8f0
 unregister_netdevice_many_notify+0x1d5f/0x22c0
 unregister_netdevice_queue+0x31f/0x360
 nsim_destroy+0x277/0x7f0
 __nsim_dev_port_del+0x14f/0x200
 nsim_dev_reload_destroy+0x288/0x490
 nsim_dev_reload_down+0x8a/0xc0
 devlink_reload+0x1eb/0x8c0
 devlink_pernet_pre_exit+0x1ff/0x420
 ops_undo_list+0x187/0x940
 cleanup_net+0x56b/0x800
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
