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: 0 PID: 6822 Comm: syz-executor604 Not tainted 5.8.0-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+0x102/0x2c30 kernel/locking/lockdep.c:4259 lock_acquire+0x160/0x720 kernel/locking/lockdep.c:4959 __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:1355 [inline] hci_conn_hash_flush+0x127/0x200 net/bluetooth/hci_conn.c:1536 hci_dev_do_close+0xb7b/0x1040 net/bluetooth/hci_core.c:1761 hci_unregister_dev+0x16d/0x1590 net/bluetooth/hci_core.c:3606 vhci_release+0x73/0xc0 drivers/bluetooth/hci_vhci.c:340 __fput+0x2f0/0x750 fs/file_table.c:281 task_work_run+0x137/0x1c0 kernel/task_work.c:135 exit_task_work include/linux/task_work.h:25 [inline] do_exit+0x601/0x1f80 kernel/exit.c:805 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+0x73/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x445048 Code: Bad RIP value. RSP: 002b:00007ffdfcc18078 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000445048 RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00000000004cce70 R08: 00000000000000e7 R09: ffffffffffffffd0 R10: 00007fae95b4a9d0 R11: 0000000000000246 R12: 0000000000000001 R13: 00000000006e0200 R14: 000000000233a850 R15: 0000000000000001