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workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2298 at __queue_work+0xd1f/0xfc0, CPU#1: pool_workqueue_/3
Modules linked in:
CPU: 1 UID: 0 PID: 3 Comm: pool_workqueue_ 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
RIP: 0010:__queue_work+0xd4a/0xfc0
Code: 83 c5 18 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 c7 b7 a3 00 49 8b 75 00 49 81 c7 70 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 48 83 c4 58 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc
RSP: 0018:ffffc90000a08bf0 EFLAGS: 00010082
RAX: 1ffff1102186514e RBX: 0000000000000008 RCX: ffff8881026f1d80
RDX: ffff888021e55170 RSI: ffffffff8a9ba3a0 RDI: ffffffff90339eb0
RBP: 0000000000000100 R08: ffffffff9030a7f7 R09: 1ffffffff20614fe
R10: dffffc0000000000 R11: ffffffff818d3620 R12: dffffc0000000000
R13: ffff88810c328a70 R14: ffffffff90339eb0 R15: ffff888021e55170
FS:  0000000000000000(0000) GS:ffff8882a9290000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557a78da68 CR3: 000000011066e000 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:lockdep_unregister_key+0x2d5/0x350
Code: 11 0a 09 00 89 c6 48 c7 c7 30 58 41 96 e8 f3 06 09 0a 90 e9 65 fe ff ff e8 38 52 06 0a 41 f7 c7 00 02 00 00 74 b3 fb 40 84 ed <75> b2 eb c3 90 0f 0b 90 e9 26 ff ff ff 90 0f 0b 90 e9 2e ff ff ff
RSP: 0018:ffffc90000087c90 EFLAGS: 00000202
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000046
RDX: ffffffff93fcd398 RSI: ffffffff8dfbf6b0 RDI: ffffffff8c28ac60
RBP: ffff8881026f1d01 R08: ffffffff81af17d8 R09: ffffffff8e95cd60
R10: dffffc0000000000 R11: fffff52000010f8d R12: 0000000000000000
R13: ffff88816ea3a931 R14: 0000000000001000 R15: 0000000000000a03
 pwq_release_workfn+0x6d1/0x8c0
 kthread_worker_fn+0x4ee/0xb20
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
