syzbot

------------[ cut here ]------------
workqueue: cannot queue hci_cmd_timeout on wq hci0
WARNING: kernel/workqueue.c:2298 at __queue_work+0xf6c/0x12f8 kernel/workqueue.c:2296, CPU#1: syz-executor/4965
Modules linked in:
CPU: 1 UID: 0 PID: 4965 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __queue_work+0xf6c/0x12f8 kernel/workqueue.c:2296
lr : __queue_work+0xf6c/0x12f8 kernel/workqueue.c:2296
sp : ffff80008e8e7b10
x29: ffff80008e8e7b50 x28: dfff800000000000 x27: ffff700011d1cf84
x26: ffff0000d4dc6000 x25: 0000000000000008 x24: ffff0000d4dc61c0
x23: dfff800000000000 x22: ffff0000d426d708 x21: 0000000000000100
x20: ffff800089f06000 x19: ffff0000d188ca70 x18: 00000000ffffffff
x17: ffff8001258ac000 x16: ffff80008e8e0000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000ff0100 x9 : 79212cccd74ffb00
x8 : 79212cccd74ffb00 x7 : ffff8000804886d0 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000802f13b0
x2 : 0000000000000100 x1 : ffff0000d426d700 x0 : 0000000000000000
Call trace:
 __queue_work+0xf6c/0x12f8 kernel/workqueue.c:2296 (P)
 delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:2527
 call_timer_fn+0x19c/0xa4c kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x554/0x74c kernel/time/timer.c:2386
 run_timer_base+0x84/0x1b8 kernel/time/timer.c:2395
 run_timer_softirq+0x20/0x48 kernel/time/timer.c:2405
 handle_softirqs+0x2e4/0xd34 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:889
 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73
 invoke_softirq kernel/softirq.c:503 [inline]
 __irq_exit_rcu+0x1ac/0x428 kernel/softirq.c:735
 irq_exit_rcu+0x14/0x84 kernel/softirq.c:752
 __el1_irq arch/arm64/kernel/entry-common.c:497 [inline]
 el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:509
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:514
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:590
 __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/0x368 kernel/locking/lockdep.c:5871 (P)
 touch_wq_lockdep_map+0xb4/0x15c kernel/workqueue.c:4017
 __flush_workqueue+0x110/0xd9c kernel/workqueue.c:4059
 drain_workqueue+0xa4/0x310 kernel/workqueue.c:4223
 hci_dev_close_sync+0x418/0xd88 net/bluetooth/hci_sync.c:5354
 hci_dev_do_close+0x34/0xb8 net/bluetooth/hci_core.c:502
 hci_unregister_dev+0x1e8/0x49c net/bluetooth/hci_core.c:2716
 vhci_release+0x12c/0x17c drivers/bluetooth/hci_vhci.c:690
 __fput+0x340/0x744 fs/file_table.c:510
 ____fput+0x20/0x30 fs/file_table.c:538
 task_work_run+0x1c4/0x254 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x580/0x1a6c kernel/exit.c:975
 do_group_exit+0x194/0x22c kernel/exit.c:1117
 __do_sys_exit_group kernel/exit.c:1128 [inline]
 __se_sys_exit_group kernel/exit.c:1126 [inline]
 pid_child_should_wake+0x0/0x110 kernel/exit.c:1126
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
irq event stamp: 169879
hardirqs last  enabled at (169878): [<ffff8000867248cc>] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:515 [inline]
hardirqs last  enabled at (169878): [<ffff8000867248cc>] arm64_exit_to_kernel_mode+0x7c/0x90 arch/arm64/kernel/entry-common.c:62
hardirqs last disabled at (169879): [<ffff800086743ef0>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:140 [inline]
hardirqs last disabled at (169879): [<ffff800086743ef0>] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:174
softirqs last  enabled at (167926): [<ffff800084aa1108>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (167926): [<ffff800084aa1108>] release_sock+0x150/0x228 net/core/sock.c:3825
softirqs last disabled at (169875): [<ffff8000800204b0>] __do_softirq+0x14/0x20 kernel/softirq.c:656
---[ end trace 0000000000000000 ]---