------------[ cut here ]------------
WARNING: CPU: 0 PID: 29834 at kernel/workqueue.c:1438 __queue_work+0xe36/0x1200 kernel/workqueue.c:1438
Modules linked in:
CPU: 0 PID: 29834 Comm: syz-executor.4 Not tainted 6.0.0-syzkaller-02739-g60df8c4d32d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:__queue_work+0xe36/0x1200 kernel/workqueue.c:1438
Code: e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 72 77 7a 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 73 66 2d 00 85 db 75 42 e8 aa 69 2d 00 <0f> 0b e9 4a f8 ff ff e8 9e 69 2d 00 0f 0b e9 dc f7 ff ff e8 92 69
RSP: 0018:ffffc90000007cb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000100 RCX: 0000000000000100
RDX: ffff88807d545880 RSI: ffffffff814dabc6 RDI: 0000000000000005
RBP: ffffc90000007d70 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000001 R12: ffff88807b06cb30
R13: 1ffff92000000fa8 R14: ffffffff814e0720 R15: ffff88801c383000
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005599d2903680 CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1514 [inline]
 __run_timers.part.0+0x4a3/0xa80 kernel/time/timer.c:1790
 __run_timers kernel/time/timer.c:1768 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
 __do_softirq+0x1d0/0x9c8 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:flush_workqueue_prep_pwqs+0x2bc/0x4f0 kernel/workqueue.c:2757
Code: 44 24 1f 48 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 87 2f 2e 00 0f 0b e9 1d ff ff ff e8 7b 2f 2e 00 0f 0b e9 40 fe ff ff <e8> 6f 2f 2e 00 48 8d ab b8 00 00 00 be 04 00 00 00 48 89 ef e8 bb
RSP: 0018:ffffc9000350f740 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88801c383000 RCX: ffffffff814ce36a
RDX: ffff88807d545880 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffffc9000350f910 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88801c383020 R15: ffff88801c3830d8
 __flush_workqueue+0x533/0x13a0 kernel/workqueue.c:2835
 drain_workqueue+0x1a5/0x3c0 kernel/workqueue.c:2974
 hci_dev_close_sync+0x2ef/0x1200 net/bluetooth/hci_sync.c:4809
 hci_dev_do_close+0x2d/0x70 net/bluetooth/hci_core.c:554
 hci_unregister_dev+0x17f/0x4e0 net/bluetooth/hci_core.c:2702
 vhci_release+0x7c/0xf0 drivers/bluetooth/hci_vhci.c:568
 __fput+0x277/0x9d0 fs/file_table.c:320
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xad5/0x29b0 kernel/exit.c:795
 do_group_exit+0xd2/0x2f0 kernel/exit.c:925
 get_signal+0x2387/0x2610 kernel/signal.c:2857
 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe4b4e8a5a9
Code: Unable to access opcode bytes at 0x7fe4b4e8a57f.
RSP: 002b:00007fe4b604a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000000012 RBX: 00007fe4b4fabf80 RCX: 00007fe4b4e8a5a9
RDX: 0000000000000012 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00007fe4b4ee5580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffff21f0b4f R14: 00007fe4b604a300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	44 24 1f             	rex.R and $0x1f,%al
   3:	48 83 c4 28          	add    $0x28,%rsp
   7:	5b                   	pop    %rbx
   8:	5d                   	pop    %rbp
   9:	41 5c                	pop    %r12
   b:	41 5d                	pop    %r13
   d:	41 5e                	pop    %r14
   f:	41 5f                	pop    %r15
  11:	c3                   	retq
  12:	e8 87 2f 2e 00       	callq  0x2e2f9e
  17:	0f 0b                	ud2
  19:	e9 1d ff ff ff       	jmpq   0xffffff3b
  1e:	e8 7b 2f 2e 00       	callq  0x2e2f9e
  23:	0f 0b                	ud2
  25:	e9 40 fe ff ff       	jmpq   0xfffffe6a
* 2a:	e8 6f 2f 2e 00       	callq  0x2e2f9e <-- trapping instruction
  2f:	48 8d ab b8 00 00 00 	lea    0xb8(%rbx),%rbp
  36:	be 04 00 00 00       	mov    $0x4,%esi
  3b:	48 89 ef             	mov    %rbp,%rdi
  3e:	e8                   	.byte 0xe8
  3f:	bb                   	.byte 0xbb