IPVS: ftp: loaded support on port[0] = 21 INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 1 PID: 6831 Comm: syz-executor993 Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1f0/0x31e lib/dump_stack.c:118 register_lock_class+0xf06/0x1520 kernel/locking/lockdep.c:893 __lock_acquire+0xfa/0x2ab0 kernel/locking/lockdep.c:4305 lock_acquire+0x160/0x730 kernel/locking/lockdep.c:5005 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x9e/0xc0 kernel/locking/spinlock.c:159 skb_dequeue net/core/skbuff.c:3038 [inline] skb_queue_purge+0x2e/0x1c0 net/core/skbuff.c:3076 l2cap_conn_del+0x3de/0x650 net/bluetooth/l2cap_core.c:1890 hci_disconn_cfm include/net/bluetooth/hci_core.h:1438 [inline] hci_conn_hash_flush+0x127/0x200 net/bluetooth/hci_conn.c:1557 hci_dev_do_close+0xb7b/0x1040 net/bluetooth/hci_core.c:1770 hci_unregister_dev+0x185/0x1590 net/bluetooth/hci_core.c:3790 vhci_release+0x73/0xc0 drivers/bluetooth/hci_vhci.c:340 __fput+0x34f/0x7b0 fs/file_table.c:281 task_work_run+0x137/0x1c0 kernel/task_work.c:141 exit_task_work include/linux/task_work.h:25 [inline] do_exit+0x5f3/0x1f20 kernel/exit.c:806 do_group_exit+0x161/0x2d0 kernel/exit.c:903 __do_sys_exit_group+0x13/0x20 kernel/exit.c:914 __se_sys_exit_group+0x10/0x10 kernel/exit.c:912 __x64_sys_exit_group+0x37/0x40 kernel/exit.c:912 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445048 Code: Bad RIP value. RSP: 002b:00007ffc26458318 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000445048 RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00000000004cce10 R08: 00000000000000e7 R09: ffffffffffffffd0 R10: 00000000000000ff R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006e0200 R14: 0000000000000000 R15: 0000000000000000