------------[ cut here ]------------
WARNING: CPU: 1 PID: 5770 at kernel/workqueue.c:1745 is_chained_work kernel/workqueue.c:1691 [inline]
WARNING: CPU: 1 PID: 5770 at kernel/workqueue.c:1745 __queue_work+0xd49/0x1020 kernel/workqueue.c:1744
Modules linked in:
CPU: 1 PID: 5770 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__queue_work+0xd49/0x1020 kernel/workqueue.c:1744
Code: 4c 89 f7 48 89 de 89 e9 e8 c4 e6 00 00 48 8b 5c 24 10 e9 10 ff ff ff e8 a5 ab 2f 00 eb 0c e8 9e ab 2f 00 eb 05 e8 97 ab 2f 00 <0f> 0b 48 83 c4 78 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 81 ab 2f 00
RSP: 0018:ffffc900001f0b10 EFLAGS: 00010046
RAX: ffffffff815770bb RBX: 0000000000000100 RCX: ffff888018bd8000
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: ffff8880311215c0 R08: ffffffff8e8aeeef R09: 1ffffffff1d15ddd
R10: dffffc0000000000 R11: fffffbfff1d15dde R12: 0000000000000008
R13: dffffc0000000000 R14: ffff88802fc8c9c0 R15: ffff888031121400
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2cff0aa000 CR3: 0000000077b74000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1747 [inline]
 __run_timers+0x56d/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5255
Code: 0f 84 33 01 00 00 48 85 db 0f 85 52 01 00 00 e9 de 04 00 00 4c 8b 75 d0 4c 89 e7 e8 00 54 31 09 e8 9b 23 30 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000458f438 EFLAGS: 00000282
RAX: 661ab61198244d00 RBX: 0000000000000000 RCX: 661ab61198244d00
RDX: dffffc0000000000 RSI: ffffffff8acac960 RDI: ffffffff8b1c85a0
RBP: ffffc9000458f490 R08: ffffffff911c150f R09: 1ffffffff22382a1
R10: dffffc0000000000 R11: fffffbfff22382a2 R12: ffff888018bd8000
R13: dffffc0000000000 R14: ffff8880238dda00 R15: ffff8880b8f3cac8
 context_switch kernel/sched/core.c:5384 [inline]
 __schedule+0x155b/0x45a0 kernel/sched/core.c:6700
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irq+0x40/0x50 kernel/locking/spinlock.c:202
 flush_workqueue_prep_pwqs+0x298/0x480 kernel/workqueue.c:3168
 __flush_workqueue+0x492/0x13d0 kernel/workqueue.c:3234
 drain_workqueue+0xd3/0x380 kernel/workqueue.c:3373
 hci_dev_close_sync+0x4b9/0xfa0 net/bluetooth/hci_sync.c:5271
 hci_dev_do_close net/bluetooth/hci_core.c:523 [inline]
 hci_unregister_dev+0x21a/0x500 net/bluetooth/hci_core.c:2709
 vhci_release+0x155/0x1a0 drivers/bluetooth/hci_vhci.c:691
 __fput+0x234/0x970 fs/file_table.c:384
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0x95a/0x2460 kernel/exit.c:883
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff59e59c799
Code: Unable to access opcode bytes at 0x7ff59e59c76f.
RSP: 002b:00007ffd2d472d58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007ff59e632002 RCX: 00007ff59e59c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 0000000000000000 R09: 00007ff59e631f90
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd2d474010
R13: 00007ff59e631f90 R14: 0000555585d024e8 R15: 00007ffd2d4761d0
 </TASK>
----------------
Code disassembly (best guess):
   0:	0f 84 33 01 00 00    	je     0x139
   6:	48 85 db             	test   %rbx,%rbx
   9:	0f 85 52 01 00 00    	jne    0x161
   f:	e9 de 04 00 00       	jmp    0x4f2
  14:	4c 8b 75 d0          	mov    -0x30(%rbp),%r14
  18:	4c 89 e7             	mov    %r12,%rdi
  1b:	e8 00 54 31 09       	call   0x9315420
  20:	e8 9b 23 30 00       	call   0x3023c0
  25:	fb                   	sti
  26:	4c 8b 65 c0          	mov    -0x40(%rbp),%r12
* 2a:	49 8d bc 24 f8 15 00 	lea    0x15f8(%r12),%rdi <-- trapping instruction
  31:	00
  32:	48 89 f8             	mov    %rdi,%rax
  35:	48 c1 e8 03          	shr    $0x3,%rax
  39:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax
  3e:	84 c0                	test   %al,%al