------------[ cut here ]------------
WARNING: CPU: 0 PID: 13488 at kernel/workqueue.c:1441 __queue_work+0xe2d/0xfb0 kernel/workqueue.c:1441
Modules linked in:
CPU: 0 PID: 13488 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__queue_work+0xe2d/0xfb0 kernel/workqueue.c:1441
Code: e9 9d fc ff ff 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 0f 8c c7 fc ff ff 48 8b 3c 24 e8 dd d2 7d 00 e9 b9 fc ff ff e8 93 a1 2d 00 <0f> 0b 48 83 c4 60 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 7d a1 2d 00
RSP: 0018:ffffc90000007ae8 EFLAGS: 00010046
RAX: ffffffff81533e3d RBX: 0000000000010000 RCX: ffff88802e109dc0
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1bfe1c6
R10: fffffbfff1bfe1c6 R11: 1ffffffff1bfe1c5 R12: ffff888052866000
R13: ffff8880528661c0 R14: 0000000000000008 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0aee446e9c CR3: 000000005730a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1747 [inline]
 __run_timers+0x554/0x7d0 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_schedule_irq+0xac/0x150 kernel/sched/core.c:6873
Code: 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 70 bf 01 00 00 00 e8 2f b8 3e f7 e8 ea 33 6e f7 fb bf 01 00 00 00 <e8> df b9 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90003417680 EFLAGS: 00000282
RAX: 6a433a4b0a0a6300 RBX: 0000000000000000 RCX: 6a433a4b0a0a6300
RDX: dffffc0000000000 RSI: ffffffff8a6c0600 RDI: 0000000000000001
RBP: ffffc90003417720 R08: dffffc0000000000 R09: fffffbfff2119073
R10: fffffbfff2119073 R11: 1ffffffff2119072 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000682ed0
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_reschedule_ipi+0x16/0x20 arch/x86/include/asm/idtentry.h:696
RIP: 0010:lock_acquire+0x20f/0x490 kernel/locking/lockdep.c:5666
Code: 00 9c 8f 84 24 80 00 00 00 f6 84 24 81 00 00 00 02 0f 85 f5 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 66 43 c7 44 3d 09 00 00 43 c6 44 3d 0b
RSP: 0018:ffffc900034177e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 6a433a4b0a0a6300
RDX: ffffffff902ce370 RSI: ffffffff8a6c1780 RDI: ffffffff8abef920
RBP: ffffc900034178e8 R08: dffffc0000000000 R09: fffffbfff262ce94
R10: fffffbfff262ce94 R11: 1ffffffff262ce93 R12: 0000000000000000
R13: 1ffff92000682f08 R14: 0000000000000246 R15: dffffc0000000000
 __flush_workqueue+0x13d/0x1380 kernel/workqueue.c:2812
 drain_workqueue+0xcf/0x380 kernel/workqueue.c:2977
 hci_dev_close_sync+0x447/0xf40 net/bluetooth/hci_sync.c:5231
 hci_dev_do_close net/bluetooth/hci_core.c:510 [inline]
 hci_unregister_dev+0x202/0x4f0 net/bluetooth/hci_core.c:2705
 vhci_release+0x7f/0xd0 drivers/bluetooth/hci_vhci.c:573
 __fput+0x22c/0x920 fs/file_table.c:320
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x93e/0x2400 kernel/exit.c:880
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 __do_sys_exit_group kernel/exit.c:1033 [inline]
 __se_sys_exit_group kernel/exit.c:1031 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1031
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb7d158f749
Code: Unable to access opcode bytes at 0x7fb7d158f71f.
RSP: 002b:00007ffe54fd43b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fb7d158f749
RDX: 00007fb7d15915dc RSI: 0000000000000000 RDI: 0000000000000007
RBP: 0000000000000000 R08: 000000000000000c R09: 0000000000000007
R10: 00007ffe54fd49e4 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fb7d2314670 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	44 24 20             	rex.R and $0x20,%al
   3:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
   8:	74 0b                	je     0x15
   a:	0f 0b                	ud2
   c:	48 f7 03 08 00 00 00 	testq  $0x8,(%rbx)
  13:	74 70                	je     0x85
  15:	bf 01 00 00 00       	mov    $0x1,%edi
  1a:	e8 2f b8 3e f7       	call   0xf73eb84e
  1f:	e8 ea 33 6e f7       	call   0xf76e340e
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 df b9 ff ff       	call   0xffffba0e <-- trapping instruction
  2f:	48 c7 44 24 40 00 00 	movq   $0x0,0x40(%rsp)
  36:	00 00
  38:	9c                   	pushf
  39:	8f 44 24 40          	pop    0x40(%rsp)
  3d:	8b                   	.byte 0x8b
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24