------------[ cut here ]------------ workqueue: cannot queue hci_conn_timeout on wq hci5 WARNING: CPU: 0 PID: 9 at kernel/workqueue.c:2257 __queue_work+0xd03/0x1160 kernel/workqueue.c:2256 Modules linked in: CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: events l2cap_chan_timeout RIP: 0010:__queue_work+0xd03/0x1160 kernel/workqueue.c:2256 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 20 17 8c 8b e8 8e 18 f7 ff 90 <0f> 0b 90 90 e9 2f f7 ff ff e8 8f df 38 00 90 0f 0b 90 e9 b4 f5 ff RSP: 0018:ffffc900000e7a38 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817a9ee8 RDX: ffff88801cef8000 RSI: ffffffff817a9ef5 RDI: 0000000000000001 RBP: ffff888031474948 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88802794f800 R14: ffff888031474990 R15: ffff88802794f978 FS: 0000000000000000(0000) GS:ffff8881249e0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000005000 CR3: 000000000e182000 CR4: 0000000000350ef0 Call Trace: __queue_delayed_work+0x35b/0x460 kernel/workqueue.c:2509 queue_delayed_work_on+0x1b5/0x200 kernel/workqueue.c:2561 queue_delayed_work include/linux/workqueue.h:684 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1699 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1673 [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:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245