------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci2
WARNING: kernel/workqueue.c:2252 at __queue_work+0xd20/0xf90 kernel/workqueue.c:2250, CPU#0: kworker/u9:3/27914
Modules linked in:
CPU: 0 UID: 0 PID: 27914 Comm: kworker/u9:3 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: hci2 hci_error_reset
RIP: 0010:__queue_work+0xd4b/0xf90 kernel/workqueue.c:2250
Code: 83 c5 18 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ef e8 76 c0 9c 00 49 8b 75 00 49 81 c7 78 01 00 00 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 48 83 c4 58 5b 41 5c 41 5d 41 5e 41 5f 5d e9 68 e9
RSP: 0018:ffffc90000007c10 EFLAGS: 00010086
RAX: 1ffff1100efb694b RBX: 0000000000000008 RCX: ffff88802f92bd00
RDX: ffff8880af4e8178 RSI: ffffffff8a556240 RDI: ffffffff8f850a60
RBP: 0000000000000100 R08: ffffffff8f822277 R09: 1ffffffff1f0444e
R10: dffffc0000000000 R11: ffffffff818a5d90 R12: dffffc0000000000
R13: ffff888077db4a58 R14: ffffffff8f850a60 R15: ffff8880af4e8178
FS:  0000000000000000(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006c030 CR3: 000000006bbf9000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1794 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x646/0x860 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x222/0x340 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 00 a1 bb 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 0a 20 e2 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 da 50 72 ff cc 48 8d 3d 37 77 e7
RSP: 0018:ffffc90003b576c8 EFLAGS: 00000282
RAX: 2a51570fa681db00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000000000003 RSI: ffffffff8d975f94 RDI: ffffffff8bc083e0
RBP: ffffffff818a94a5 R08: 0000000000000008 R09: ffffffff95c37dd0
R10: 00000000221ff1d9 R11: 00000000cb62cdaa R12: 0000000000000000
R13: ffff8880af4e8148 R14: 0000000000000001 R15: 0000000000000246
 touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:3940
 __flush_workqueue+0x121/0x14b0 kernel/workqueue.c:3982
 drain_workqueue+0xd3/0x390 kernel/workqueue.c:4146
 hci_dev_close_sync+0x62f/0x1100 net/bluetooth/hci_sync.c:5312
 hci_dev_do_close net/bluetooth/hci_core.c:501 [inline]
 hci_error_reset+0x127/0x4d0 net/bluetooth/hci_core.c:1034
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	83 c5 18             	add    $0x18,%ebp
   3:	4c 89 e8             	mov    %r13,%rax
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
   f:	74 08                	je     0x19
  11:	4c 89 ef             	mov    %r13,%rdi
  14:	e8 76 c0 9c 00       	call   0x9cc08f
  19:	49 8b 75 00          	mov    0x0(%r13),%rsi
  1d:	49 81 c7 78 01 00 00 	add    $0x178,%r15
  24:	4c 89 f7             	mov    %r14,%rdi
  27:	4c 89 fa             	mov    %r15,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 58          	add    $0x58,%rsp
  33:	5b                   	pop    %rbx
  34:	41 5c                	pop    %r12
  36:	41 5d                	pop    %r13
  38:	41 5e                	pop    %r14
  3a:	41 5f                	pop    %r15
  3c:	5d                   	pop    %rbp
  3d:	e9                   	.byte 0xe9
  3e:	68                   	.byte 0x68
  3f:	e9                   	.byte 0xe9