syzbot

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workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2252 at __queue_work+0xfa0/0x121c kernel/workqueue.c:2250, CPU#1: syz.2.66/7045
Modules linked in:
CPU: 1 UID: 0 PID: 7045 Comm: syz.2.66 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __queue_work+0xfa0/0x121c kernel/workqueue.c:2250
lr : __queue_work+0xfa0/0x121c kernel/workqueue.c:2250
sp : ffff800097bd7b20
x29: ffff800097bd7b70 x28: dfff800000000000 x27: ffff700012f7af84
x26: ffff0000c9cf5800 x25: 0000000000000008 x24: 1fffe000198eeab1
x23: dfff800000000000 x22: ffff0000c9cf59c0 x21: 0000000000000100
x20: ffff800092e86000 x19: ffff0000c8b3ca88 x18: 00000000ffffffff
x17: ffff80010c451000 x16: ffff800082e5c71c x15: 0000000000000001
x14: 1fffe000337818fa x13: 0000000000000000 x12: 0000000000000000
x11: ffff6000337818fb x10: 0000000000ff0100 x9 : 490e7beda77d0400
x8 : 490e7beda77d0400 x7 : ffff800080575c38 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000807f0908
x2 : 0000000000000001 x1 : 0000000000000100 x0 : 0000000000000000
Call trace:
 __queue_work+0xfa0/0x121c kernel/workqueue.c:2250 (P)
 delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:2481
 call_timer_fn+0x19c/0x814 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x54c/0x76c kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xcc/0x194 kernel/time/timer.c:2404
 handle_softirqs+0x31c/0xc88 kernel/softirq.c:622
 __do_softirq+0x14/0x20 kernel/softirq.c:656
 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:68
 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:891
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73
 invoke_softirq kernel/softirq.c:503 [inline]
 __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:723
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:739
 __el1_irq arch/arm64/kernel/entry-common.c:498 [inline]
 el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:510
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:515
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592
 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P)
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P)
 lock_acquire+0x16c/0x2e0 kernel/locking/lockdep.c:5871 (P)
 touch_wq_lockdep_map+0xa8/0x164 kernel/workqueue.c:3940
 __flush_workqueue+0xfc/0x109c kernel/workqueue.c:3982
 drain_workqueue+0xa4/0x310 kernel/workqueue.c:4146
 hci_dev_close_sync+0x4b8/0xfd0 net/bluetooth/hci_sync.c:5312
 hci_dev_do_close net/bluetooth/hci_core.c:501 [inline]
 hci_unregister_dev+0x204/0x52c net/bluetooth/hci_core.c:2715
 vhci_release+0x12c/0x17c drivers/bluetooth/hci_vhci.c:690
 __fput+0x340/0x75c fs/file_table.c:468
 ____fput+0x20/0x58 fs/file_table.c:496
 task_work_run+0x1dc/0x260 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x52c/0x1a1c kernel/exit.c:971
 do_group_exit+0x194/0x22c kernel/exit.c:1112
 get_signal+0x11dc/0x12f8 kernel/signal.c:3034
 arch_do_signal_or_restart+0x268/0x46d4 arch/arm64/kernel/signal.c:1619
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x88/0x18c kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline]
 el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 2627
hardirqs last  enabled at (2626): [<ffff8000803e03d4>] handle_softirqs+0x1f4/0xc88 kernel/softirq.c:606
hardirqs last disabled at (2627): [<ffff80008afb8db8>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline]
hardirqs last disabled at (2627): [<ffff80008afb8db8>] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170
softirqs last  enabled at (306): [<ffff8000803e0cd8>] softirq_handle_end kernel/softirq.c:468 [inline]
softirqs last  enabled at (306): [<ffff8000803e0cd8>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650
softirqs last disabled at (2625): [<ffff800080020fb4>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---