syzbot

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workqueue: cannot queue hci_conn_timeout on wq hci4
WARNING: CPU: 1 PID: 9243 at kernel/workqueue.c:2255 __queue_work+0xd03/0x1160 kernel/workqueue.c:2254
Modules linked in:
CPU: 1 UID: 0 PID: 9243 Comm: kworker/1:5 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xd03/0x1160 kernel/workqueue.c:2254
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 4b 04 00 00 48 8b 75 18 4c 89 fa 48 c7 c7 a0 00 ac 8b e8 be 1e f7 ff 90 <0f> 0b 90 90 e9 2f f7 ff ff e8 ef 78 38 00 90 0f 0b 90 e9 b4 f5 ff
RSP: 0018:ffffc90002ed7a48 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817a3358
RDX: ffff88802aa8c880 RSI: ffffffff817a3365 RDI: 0000000000000001
RBP: ffff8880339b8948 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: fffffffffffc9a18 R12: 0000000000000000
R13: ffff888032bd2000 R14: ffff8880339b8990 R15: ffff888032bd2178
FS:  0000000000000000(0000) GS:ffff8881247b9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564fd0c77ce8 CR3: 000000000e380000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 000000000000000b DR2: 0000000000000002
DR3: 0000000000000009 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2507
 queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2559
 queue_delayed_work include/linux/workqueue.h:684 [inline]
 hci_conn_drop include/net/bluetooth/hci_core.h:1675 [inline]
 hci_conn_drop include/net/bluetooth/hci_core.h:1649 [inline]
 l2cap_chan_del+0x5a0/0x8f0 net/bluetooth/l2cap_core.c:671
 l2cap_chan_close+0xfe/0xa30 net/bluetooth/l2cap_core.c:844
 l2cap_chan_timeout+0x196/0x310 net/bluetooth/l2cap_core.c:431
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>