[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.129' (ECDSA) to the list of known hosts. syzkaller login: [ 46.948537][ T6811] IPVS: ftp: loaded support on port[0] = 21 executing program [ 47.037208][ T6811] INFO: trying to register non-static key. [ 47.043451][ T6811] the code is fine but needs lockdep annotation. [ 47.049760][ T6811] turning off the locking correctness validator. [ 47.056071][ T6811] CPU: 1 PID: 6811 Comm: syz-executor778 Not tainted 5.9.0-rc2-syzkaller #0 [ 47.064839][ T6811] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.074928][ T6811] Call Trace: [ 47.078202][ T6811] dump_stack+0x1f0/0x31e [ 47.082518][ T6811] register_lock_class+0xf06/0x1520 [ 47.087701][ T6811] ? lock_is_held_type+0xb3/0xe0 [ 47.092619][ T6811] __lock_acquire+0xfa/0x2ab0 [ 47.097393][ T6811] ? trace_lock_release+0x137/0x1a0 [ 47.102572][ T6811] ? mark_lock+0x102/0x1b00 [ 47.107054][ T6811] lock_acquire+0x160/0x730 [ 47.111700][ T6811] ? skb_queue_purge+0x2e/0x1c0 [ 47.116697][ T6811] ? lockdep_hardirqs_on_prepare+0x445/0x6a0 [ 47.122679][ T6811] ? queue_delayed_work_on+0x149/0x1b0 [ 47.128378][ T6811] _raw_spin_lock_irqsave+0x9e/0xc0 [ 47.133695][ T6811] ? skb_queue_purge+0x2e/0x1c0 [ 47.138527][ T6811] skb_queue_purge+0x2e/0x1c0 [ 47.143366][ T6811] l2cap_conn_del+0x3de/0x650 [ 47.148068][ T6811] ? l2cap_connect_cfm+0x12b0/0x12b0 [ 47.153336][ T6811] hci_conn_hash_flush+0x127/0x200 [ 47.158434][ T6811] hci_dev_do_close+0xb7b/0x1040 [ 47.163363][ T6811] hci_unregister_dev+0x185/0x1590 [ 47.168454][ T6811] vhci_release+0x73/0xc0 [ 47.172825][ T6811] ? vhci_open+0x290/0x290 [ 47.177226][ T6811] __fput+0x34f/0x7b0 [ 47.181191][ T6811] task_work_run+0x137/0x1c0 [ 47.185765][ T6811] do_exit+0x5f3/0x1f20 [ 47.189901][ T6811] ? vfs_write+0x787/0xd10 [ 47.194301][ T6811] ? do_sys_openat2+0x6a5/0x830 [ 47.199158][ T6811] do_group_exit+0x161/0x2d0 [ 47.203733][ T6811] ? syscall_enter_from_user_mode+0x24/0x1a0 [ 47.209698][ T6811] __do_sys_exit_group+0x13/0x20 [ 47.214670][ T6811] __se_sys_exit_group+0x10/0x10 [ 47.219756][ T6811] __x64_sys_exit_group+0x37/0x40 [ 47.224831][ T6811] do_syscall_64+0x31/0x70 [ 47.229233][ T6811] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 47.235286][ T6811] RIP: 0033:0x445068 [ 47.239278][ T6811] Code: Bad RIP value. [ 47.243327][ T6811] RSP: 002b:00007ffdf83e23a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 47.251877][ T6811] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000445068 [ 47.259960][ T6811] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 47.268085][ T6811] RBP: 00000000004cce30 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 47.276040][ T6811] R10: 00000000000000ff R11: 0000000000000246 R12: 0000000000000001 [ 47.283995][ T6811] R13: 00000000006e0200 R14: