Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.106' (ECDSA) to the list of known hosts.
syzkaller login: [   61.284116][ T6841] IPVS: ftp: loaded support on port[0] = 21
executing program
[   61.374303][ T6841] INFO: trying to register non-static key.
[   61.380139][ T6841] the code is fine but needs lockdep annotation.
[   61.386448][ T6841] turning off the locking correctness validator.
[   61.392759][ T6841] CPU: 0 PID: 6841 Comm: syz-executor949 Not tainted 5.9.0-rc4-syzkaller #0
[   61.401424][ T6841] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   61.412069][ T6841] Call Trace:
[   61.415370][ T6841]  dump_stack+0x198/0x1fd
[   61.419699][ T6841]  register_lock_class+0x157d/0x1630
[   61.424970][ T6841]  ? lock_is_held_type+0xbb/0xf0
[   61.429901][ T6841]  ? lock_is_held_type+0xbb/0xf0
[   61.434834][ T6841]  ? is_dynamic_key+0x1a0/0x1a0
[   61.439666][ T6841]  ? try_to_wake_up+0x57e/0x12b0
[   61.444676][ T6841]  __lock_acquire+0xf9/0x5570
[   61.449351][ T6841]  ? do_raw_spin_unlock+0x171/0x230
[   61.454549][ T6841]  ? lock_is_held_type+0xbb/0xf0
[   61.459470][ T6841]  ? lockdep_hardirqs_on_prepare+0x530/0x530
[   61.465443][ T6841]  ? __queue_work+0x61a/0xf20
[   61.470111][ T6841]  lock_acquire+0x1f3/0xae0
[   61.474613][ T6841]  ? skb_dequeue+0x1c/0x180
[   61.479103][ T6841]  ? lock_release+0x8f0/0x8f0
[   61.483768][ T6841]  ? mark_lock+0xbc/0x1710
[   61.488179][ T6841]  ? __queue_work+0x63c/0xf20
[   61.492845][ T6841]  ? check_preemption_disabled+0x50/0x130
[   61.498553][ T6841]  ? _raw_spin_lock_irqsave+0xa9/0xce
[   61.503915][ T6841]  ? lockdep_hardirqs_off+0x96/0xd0
[   61.509100][ T6841]  _raw_spin_lock_irqsave+0x94/0xce
[   61.514480][ T6841]  ? skb_dequeue+0x1c/0x180
[   61.518975][ T6841]  skb_dequeue+0x1c/0x180
[   61.523328][ T6841]  skb_queue_purge+0x21/0x30
[   61.527920][ T6841]  l2cap_chan_del+0x61d/0x1300
[   61.532674][ T6841]  l2cap_conn_del+0x46a/0x9e0
[   61.537346][ T6841]  ? l2cap_conn_del+0x9e0/0x9e0
[   61.542190][ T6841]  l2cap_disconn_cfm+0x85/0xa0
[   61.546943][ T6841]  hci_conn_hash_flush+0x114/0x220
[   61.552052][ T6841]  hci_dev_do_close+0x5c6/0x1080
[   61.556987][ T6841]  ? hci_dev_open+0x350/0x350
[   61.561645][ T6841]  ? do_raw_read_unlock+0x70/0x70
[   61.566656][ T6841]  ? try_to_grab_pending.part.0+0x770/0x770
[   61.572532][ T6841]  hci_unregister_dev+0x1bd/0xe30
[   61.578249][ T6841]  ? fcntl_setlk+0xf60/0xf60
[   61.582835][ T6841]  ? lock_is_held_type+0xbb/0xf0
[   61.587771][ T6841]  vhci_release+0x70/0xe0
[   61.592097][ T6841]  __fput+0x285/0x920
[   61.596065][ T6841]  ? vhci_close_dev+0x50/0x50
[   61.600723][ T6841]  task_work_run+0xdd/0x190
[   61.605218][ T6841]  do_exit+0xb7d/0x29f0
[   61.609362][ T6841]  ? __up_read+0x1a1/0x7b0
[   61.613783][ T6841]  ? mm_update_next_owner+0x7a0/0x7a0
[   61.619149][ T6841]  ? vmacache_update+0xce/0x140
[   61.623985][ T6841]  do_group_exit+0x125/0x310
[   61.628559][ T6841]  __ia32_sys_exit_group+0x3a/0x50
[   61.633675][ T6841]  __do_fast_syscall_32+0x60/0x90
[   61.638702][ T6841]  do_fast_syscall_32+0x2f/0x70
[   61.643539][ T6841]  entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
[   61.650817][ T6841] RIP: 0023:0xf7fa4549
[   61.654857][ T6841] Code: Bad RIP value.
[   61.658899][ T6841] RSP: 002b:00000000ffd52b5c EFLAGS: 00000296 ORIG_RAX: 00000000000000fc
[   61.667295][ T6841] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00000000080fd318
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