------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2306 at __queue_work+0xd4a/0x10a0 kernel/workqueue.c:2305, CPU#0: syz.0.3322/19423
Modules linked in:
CPU: 0 UID: 0 PID: 19423 Comm: syz.0.3322 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__queue_work+0xd66/0x10a0 kernel/workqueue.c:2305
Code: 49 81 c7 70 01 00 00 4c 8d 35 16 8e cc 0e 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 f4 c0 a6 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8
RSP: 0018:ffffc90000007bc8 EFLAGS: 00010046
RAX: 1ffff1100f4a794e RBX: dffffc0000000000 RCX: ffff88807fecdd00
RDX: ffff88804c1ab170 RSI: ffffffff8ac3a4f0 RDI: ffffffff905a7870
RBP: 0000000000000100 R08: ffffffff9057a637 R09: 1ffffffff20af4c6
R10: dffffc0000000000 R11: ffffffff818df180 R12: 0000000000000008
R13: ffff88807a53ca58 R14: ffffffff905a7870 R15: ffff88804c1ab170
FS:  00007fdbe1e5b6c0(0000) GS:ffff888124f4f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faa75d92ff8 CR3: 0000000022be6000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x67e/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:finish_task_switch+0x417/0xc60 kernel/sched/core.c:5361
Code: 04 00 00 41 c7 84 24 20 0e 00 00 00 00 00 00 0f 1f 44 00 00 49 83 c4 48 4c 89 e7 e8 f3 3b 3f 0a e8 0e ac 39 00 fb 4c 8b 65 c8 <49> 8d bc 24 f8 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc90004ac7440 EFLAGS: 00000206
RAX: 00000000000074bb RBX: ffff8880b863bf20 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8e23117e RDI: ffffffff8c4bdd80
RBP: ffffc90004ac7490 R08: ffffffff9057a637 R09: 1ffffffff20af4c6
R10: dffffc0000000000 R11: fffffbfff20af4c7 R12: ffff88807fecdd00
R13: ffff8880b863bef8 R14: dffffc0000000000 R15: 1ffff110170c77e4
 context_switch kernel/sched/core.c:5513 [inline]
 __schedule+0x17e1/0x56c0 kernel/sched/core.c:7234
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7556
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8f0 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 61 5f 2f 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 4b 4a ca 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 78 15 b8
RSP: 0018:ffffc90004ac77c8 EFLAGS: 00000282
RAX: 361d4e17d80f3300 RBX: 0000000000000000 RCX: 0000000000000046
RDX: ffffffff94201640 RSI: ffffffff8e4b625f RDI: ffffffff8c4bdd80
RBP: ffffffff818e2b55 R08: 0000000000000008 R09: ffffffff96a0c5b0
R10: 00000000c4805f79 R11: 0000000042159ab0 R12: 0000000000000000
R13: ffff88804c1ab140 R14: 0000000000000001 R15: 0000000000000246
 touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:4037
 __flush_workqueue+0x148/0x1470 kernel/workqueue.c:4079
 drain_workqueue+0xce/0x380 kernel/workqueue.c:4243
 hci_dev_close_sync+0x60e/0x10a0 net/bluetooth/hci_sync.c:5499
 hci_dev_do_close+0x30/0xc0 net/bluetooth/hci_core.c:499
 hci_rfkill_set_block+0x1f4/0x290 net/bluetooth/hci_core.c:890
 rfkill_set_block+0x19f/0x4d0 net/rfkill/core.c:360
 rfkill_fop_write+0x43b/0x560 net/rfkill/core.c:1316
 vfs_write+0x296/0xba0 fs/read_write.c:685
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdbe0f9e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdbe1e5b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fdbe1226180 RCX: 00007fdbe0f9e019
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000009
RBP: 00007fdbe103500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdbe1226218 R14: 00007fdbe1226180 R15: 00007ffe650772f8
 </TASK>
----------------
Code disassembly (best guess):
   0:	49 81 c7 70 01 00 00 	add    $0x170,%r15
   7:	4c 8d 35 16 8e cc 0e 	lea    0xecc8e16(%rip),%r14        # 0xecc8e24
   e:	48 89 f8             	mov    %rdi,%rax
  11:	48 c1 e8 03          	shr    $0x3,%rax
  15:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  19:	74 05                	je     0x20
  1b:	e8 f4 c0 a6 00       	call   0xa6c114
  20:	49 8b 75 18          	mov    0x18(%r13),%rsi
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	4c 89 fa             	mov    %r15,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	4c 89 e8             	mov    %r13,%rax
  32:	48 c1 e8 03          	shr    $0x3,%rax
  36:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  3a:	74 08                	je     0x44
  3c:	4c 89 ef             	mov    %r13,%rdi
  3f:	e8                   	.byte 0xe8