Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts.
syzkaller login: [   92.308640][ T6818] IPVS: ftp: loaded support on port[0] = 21
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
executing program
[   93.898328][ T1536] ------------[ cut here ]------------
[   93.904842][ T1536] refcount_t: addition on 0; use-after-free.
[   93.912062][ T1536] WARNING: CPU: 0 PID: 1536 at lib/refcount.c:25 refcount_warn_saturate+0x13d/0x1a0
[   93.921518][ T1536] Kernel panic - not syncing: panic_on_warn set ...
[   93.928143][ T1536] CPU: 0 PID: 1536 Comm: kworker/u5:0 Not tainted 5.8.0-syzkaller #0
[   93.936208][ T1536] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   93.946341][ T1536] Workqueue: hci0 hci_rx_work
[   93.951043][ T1536] Call Trace:
[   93.954334][ T1536]  dump_stack+0x1f0/0x31e
[   93.958680][ T1536]  panic+0x264/0x7a0
[   93.962588][ T1536]  ? __warn+0x102/0x250
[   93.966765][ T1536]  ? refcount_warn_saturate+0x13d/0x1a0
[   93.972307][ T1536]  ? refcount_warn_saturate+0x13d/0x1a0
[   93.977856][ T1536]  __warn+0x227/0x250
[   93.981850][ T1536]  ? refcount_warn_saturate+0x13d/0x1a0
[   93.987407][ T1536]  report_bug+0x1b1/0x2e0
[   93.992023][ T1536]  handle_bug+0x42/0x80
[   93.996281][ T1536]  exc_invalid_op+0x16/0x40
[   94.000775][ T1536]  asm_exc_invalid_op+0x12/0x20
[   94.005710][ T1536] RIP: 0010:refcount_warn_saturate+0x13d/0x1a0
[   94.011875][ T1536] Code: c7 63 cd f4 88 31 c0 e8 71 98 a9 fd 0f 0b eb a3 e8 d8 e8 d7 fd c6 05 b7 7f cc 05 01 48 c7 c7 9a cd f4 88 31 c0 e8 53 98 a9 fd <0f> 0b eb 85 e8 ba e8 d7 fd c6 05 9a 7f cc 05 01 48 c7 c7 c6 cd f4
[   94.032219][ T1536] RSP: 0018:ffffc90005677a70 EFLAGS: 00010246
[   94.038321][ T1536] RAX: 382d7d1d34ae2700 RBX: 0000000000000002 RCX: ffff8880a4f92040
[   94.046304][ T1536] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
[   94.054296][ T1536] RBP: 0000000000000002 R08: ffffffff815dffc9 R09: ffffed1015d062c0
[   94.062291][ T1536] R10: ffffed1015d062c0 R11: 0000000000000000 R12: 0000000000000000
[   94.070288][ T1536] R13: 0000000000000000 R14: ffff8880a637f018 R15: 0000000000000001
[   94.078313][ T1536]  ? vprintk_emit+0x339/0x3c0
[   94.083038][ T1536]  l2cap_global_chan_by_psm+0x4aa/0x4e0
[   94.088619][ T1536]  l2cap_recv_frame+0x530/0x8f10
[   94.093590][ T1536]  ? hci_rx_work+0x7ae/0x9c0
[   94.098205][ T1536]  ? hci_rx_work+0x7ae/0x9c0
[   94.102810][ T1536]  ? l2cap_recv_acldata+0x743/0xf00
[   94.110045][ T1536]  hci_rx_work+0x7d7/0x9c0
[   94.114496][ T1536]  process_one_work+0x789/0xfc0
[   94.119443][ T1536]  worker_thread+0xaa4/0x1460
[   94.124161][ T1536]  kthread+0x37e/0x3a0
[   94.128254][ T1536]  ? rcu_lock_release+0x20/0x20
[   94.133099][ T1536]  ? kthread_blkcg+0xd0/0xd0
[   94.137716][ T1536]  ret_from_fork+0x1f/0x30
[   94.143338][ T1536] Kernel Offset: disabled
[   94.147755][ T1536] Rebooting in 86400 seconds..