------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2251 at 0x0, CPU#0: kworker/u32:58/29191
Modules linked in:
CPU: 0 UID: 0 PID: 29191 Comm: kworker/u32:58 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:__queue_work+0xca1/0x10e0 kernel/workqueue.c:2250
Code: 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 0c 04 00 00 48 8d 3d 63 b7 06 0f 48 8b 75 18 <67> 48 0f b9 3a e9 90 f7 ff ff e8 e0 31 3a 00 90 0f 0b 90 e9 15 f6
RSP: 0018:ffffc90000007be8 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 0000000000000100 RCX: 1ffff11005783951
RDX: ffff888046795978 RSI: ffffffff8a6add30 RDI: ffffffff908b69e0
RBP: ffff88802bc1ca70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000100 R11: ffff88802625aff0 R12: 1ffff92000000f8f
R13: ffffffff8184c3c0 R14: 0000000000000101 R15: ffff888046795800
FS:  0000000000000000(0000) GS:ffff8880d68fd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9b74e08f98 CR3: 0000000037db7000 CR4: 0000000000352ef0
DR0: 0000000000000003 DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x19a/0x5a0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers+0x569/0xae0 kernel/time/timer.c:2373
 __run_timer_base kernel/time/timer.c:2385 [inline]
 __run_timer_base kernel/time/timer.c:2377 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2394
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2404
 handle_softirqs+0x219/0x950 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:preempt_schedule_irq+0x4c/0x90 kernel/sched/core.c:7190
Code: df 55 65 48 8b 2d 0c 9a 39 08 53 48 89 eb 48 c1 eb 03 48 01 c3 bf 01 00 00 00 e8 7f 20 12 f6 e8 ea 70 4e f6 fb bf 01 00 00 00 <e8> 3f 96 ff ff 9c 58 fa f6 c4 02 75 1e bf 01 00 00 00 e8 2d b2 11
RSP: 0018:ffffc900034b7508 EFLAGS: 00000206
RAX: 000000000004c363 RBX: ffffed1004c4b498 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff8dacb65b RDI: 0000000000000001
RBP: ffff88802625a4c0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff908878d7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x62/0x330 kernel/locking/lockdep.c:5872
Code: 36 18 12 83 f8 07 0f 87 a2 02 00 00 89 c0 48 0f a3 05 82 7f ee 0e 0f 82 74 02 00 00 8b 35 1a b0 ee 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 99 36 18 12 0f 85 ad 02 00 00 48 83 c4
RSP: 0018:ffffc900034b7618 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffff888055a2d148 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8daa55bb RDI: ffffffff8bf2a580
RBP: 0000000000000000 R08: 00000000001ecbf8 R09: ffffffff96a11540
R10: ffffc900034b73b0 R11: 0000000000002ba1 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 touch_wq_lockdep_map+0xad/0x1c0 kernel/workqueue.c:3940
 __flush_workqueue+0x128/0x1230 kernel/workqueue.c:3982
 drain_workqueue+0x199/0x3d0 kernel/workqueue.c:4146
 destroy_workqueue+0xc2/0xab0 kernel/workqueue.c:5903
 bond_destructor+0x45/0x90 drivers/net/bonding/bond_main.c:5872
 netdev_run_todo+0x780/0x12a0 net/core/dev.c:11691
 ops_exit_rtnl_list net/core/net_namespace.c:189 [inline]
 ops_undo_list+0x901/0xab0 net/core/net_namespace.c:248
 cleanup_net+0x41b/0x830 net/core/net_namespace.c:696
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	78 01                	js     0x3
   2:	00 00                	add    %al,(%rax)
   4:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   b:	fc ff df
   e:	48 89 f9             	mov    %rdi,%rcx
  11:	48 c1 e9 03          	shr    $0x3,%rcx
  15:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
  19:	0f 85 0c 04 00 00    	jne    0x42b
  1f:	48 8d 3d 63 b7 06 0f 	lea    0xf06b763(%rip),%rdi        # 0xf06b789
  26:	48 8b 75 18          	mov    0x18(%rbp),%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e9 90 f7 ff ff       	jmp    0xfffff7c4
  34:	e8 e0 31 3a 00       	call   0x3a3219
  39:	90                   	nop
  3a:	0f 0b                	ud2
  3c:	90                   	nop
  3d:	e9                   	.byte 0xe9
  3e:	15                   	.byte 0x15
  3f:	f6                   	.byte 0xf6