Warning: Permanently added '10.128.0.75' (ECDSA) to the list of known hosts.
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syzkaller login: [   94.218819][   T81] general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN
[   94.218829][   T81] KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f]
[   94.218841][   T81] CPU: 1 PID: 81 Comm: kworker/u4:2 Not tainted 5.6.0-rc1-next-20200213-syzkaller #0
[   94.218847][   T81] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.218863][   T81] Workqueue: events_unbound flush_to_ldisc
[   94.218880][   T81] RIP: 0010:do_con_write.part.0+0xa01/0x1ef0
[   94.218891][   T81] Code: 7e fe ff ff 45 01 ef e8 3d 67 80 fd 48 8b 85 c8 fe ff ff 80 38 00 0f 85 71 12 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85
[   94.218897][   T81] RSP: 0018:ffffc900010d77b8 EFLAGS: 00010203
[   94.218905][   T81] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83f58e10
[   94.218911][   T81] RDX: 0000000000000000 RSI: ffffffff83f58e63 RDI: 0000000000000003
[   94.218918][   T81] RBP: ffffc900010d7948 R08: ffff8880a9720100 R09: ffff8880a9720998
[   94.218926][   T81] R10: fffffbfff154be58 R11: ffffffff8aa5f2c7 R12: dffffc0000000000
[   94.218933][   T81] R13: 0000000000000000 R14: ffff8880953c3000 R15: 000000000000075e
[   94.218942][   T81] FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
[   94.218950][   T81] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   94.218957][   T81] CR2: 0000000020000180 CR3: 00000000a0249000 CR4: 00000000001406e0
[   94.218968][   T81] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   94.218975][   T81] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   94.218979][   T81] Call Trace:
[   94.219010][   T81]  ? do_con_trol+0x61b0/0x61b0
[   94.219028][   T81]  ? n_tty_receive_buf_common+0xc3a/0x2b70
[   94.219065][   T81]  ? do_con_write.part.0+0x1ef0/0x1ef0
[   94.219078][   T81]  con_put_char+0xfa/0x110
[   94.219094][   T81]  ? do_con_write.part.0+0x1ef0/0x1ef0
[   94.219109][   T81]  ? n_tty_receive_buf_common+0xbde/0x2b70
[   94.219124][   T81]  ? mutex_trylock+0x2d0/0x2d0
[   94.219142][   T81]  tty_put_char+0xc5/0x160
[   94.219156][   T81]  ? tty_hung_up_p+0x70/0x70
[   94.219170][   T81]  ? wait_for_completion+0x440/0x440
[   94.219186][   T81]  ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[   94.219199][   T81]  ? con_write_room+0x5d/0x70
[   94.219216][   T81]  __process_echoes+0x5c8/0xa40
[   94.219239][   T81]  n_tty_receive_buf_common+0xc77/0x2b70
[   94.219271][   T81]  n_tty_receive_buf2+0x34/0x40
[   94.219288][   T81]  tty_ldisc_receive_buf+0xad/0x1c0
[   94.219300][   T81]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   94.219313][   T81]  ? n_tty_receive_buf_common+0x2b70/0x2b70
[   94.219327][   T81]  tty_port_default_receive_buf+0x7d/0xb0
[   94.219342][   T81]  flush_to_ldisc+0x222/0x390
[   94.219364][   T81]  process_one_work+0xa05/0x17a0
[   94.219378][   T81]  ? mark_held_locks+0xf0/0xf0
[   94.219398][   T81]  ? pwq_dec_nr_in_flight+0x320/0x320
[   94.219410][   T81]  ? lock_acquire+0x190/0x410
[   94.219431][   T81]  worker_thread+0x98/0xe40
[   94.219452][   T81]  kthread+0x361/0x430
[   94.219465][   T81]  ? process_one_work+0x17a0/0x17a0
[   94.219477][   T81]  ? kthread_mod_delayed_work+0x1f0/0x1f0
[   94.219492][   T81]  ret_from_fork+0x24/0x30
[   94.219508][   T81] Modules linked in:
[   94.219569][   T81] ---[ end trace f9775c64c0622a4b ]---
[   94.219584][   T81] RIP: 0010:do_con_write.part.0+0xa01/0x1ef0
[   94.219599][   T81] Code: 7e fe ff ff 45 01 ef e8 3d 67 80 fd 48 8b 85 c8 fe ff ff 80 38 00 0f 85 71 12 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85
[   94.219606][   T81] RSP: 0018:ffffc900010d77b8 EFLAGS: 00010203
[   94.219617][   T81] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83f58e10
[   94.219626][   T81] RDX: 0000000000000000 RSI: ffffffff83f58e63 RDI: 0000000000000003
[   94.219633][   T81] RBP: ffffc900010d7948 R08: ffff8880a9720100 R09: ffff8880a9720998
[   94.219639][   T81] R10: fffffbfff154be58 R11: ffffffff8aa5f2c7 R12: dffffc0000000000
[   94.219646][   T81] R13: 0000000000000000 R14: ffff8880953c3000 R15: 000000000000075e
[   94.219657][   T81] FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
[   94.219664][   T81] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   94.219671][   T81] CR2: 0000000020000180 CR3: 00000000a0249000 CR4: 00000000001406e0
[   94.219690][   T81] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   94.219697][   T81] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   94.219703][   T81] Kernel panic - not syncing: Fatal exception
[   94.221512][   T81] Kernel Offset: disabled