[  OK  ] Started Getty on tty5.
[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.10.26' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   46.784412][ T6772] general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN
[   46.784421][ T6772] KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f]
[   46.784432][ T6772] CPU: 0 PID: 6772 Comm: syz-executor138 Not tainted 5.8.0-rc3-syzkaller #0
[   46.784437][ T6772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   46.784452][ T6772] RIP: 0010:do_con_write+0x1a6a/0xf2d0
[   46.784461][ T6772] Code: 02 00 00 48 8b 7c 24 60 49 89 ff 49 c1 ef 03 43 80 3c 2f 00 74 0a e8 05 02 b2 fd 48 8b 7c 24 60 48 8b 1f 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c5 02 00 00 66 44 89 33 48 c7 c7 64 2c
[   46.784466][ T6772] RSP: 0018:ffffc90000f87900 EFLAGS: 00010203
[   46.784474][ T6772] RAX: 0000000020000001 RBX: 000000010000000c RCX: ffff88809256e4c0
[   46.784480][ T6772] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a73353f0
[   46.784486][ T6772] RBP: ffffc90000f87be8 R08: ffffffff84017411 R09: ffffffff83ffa040
[   46.784491][ T6772] R10: 0000000000000006 R11: ffff88809256e4c0 R12: ffff8880a7335000
[   46.784498][ T6772] R13: dffffc0000000000 R14: 00000000000007fe R15: 1ffff11014e66a7e
[   46.784506][ T6772] FS:  0000000000eb5880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   46.784512][ T6772] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   46.784518][ T6772] CR2: 00000000004553a0 CR3: 00000000994c8000 CR4: 00000000001406f0
[   46.784530][ T6772] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   46.784535][ T6772] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   46.784538][ T6772] Call Trace:
[   46.784587][ T6772]  ? lockdep_hardirqs_on_prepare+0x425/0x6e0
[   46.784600][ T6772]  ? _raw_spin_unlock_irqrestore+0x6f/0xd0
[   46.784610][ T6772]  con_write+0x20/0x40
[   46.784620][ T6772]  n_tty_write+0xcbf/0x1170
[   46.784636][ T6772]  ? wait_woken+0x240/0x240
[   46.784649][ T6772]  tty_write+0x593/0x940
[   46.784659][ T6772]  ? n_tty_read+0x1ba0/0x1ba0
[   46.784669][ T6772]  ? redirected_tty_write+0xb0/0xb0
[   46.784680][ T6772]  __vfs_write+0x9c/0x6e0
[   46.784692][ T6772]  ? lock_is_held_type+0x87/0xe0
[   46.784702][ T6772]  ? rcu_read_lock_sched_held+0x2f/0xa0
[   46.784712][ T6772]  ? trace_kmem_cache_free+0xb2/0x100
[   46.784721][ T6772]  ? fsnotify_perm+0x64/0x390
[   46.784731][ T6772]  vfs_write+0x274/0x580
[   46.784743][ T6772]  ksys_write+0x11b/0x220
[   46.784754][ T6772]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   46.784762][ T6772]  do_syscall_64+0x73/0xe0
[   46.784773][ T6772]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   46.784780][ T6772] RIP: 0033:0x440459
[   46.784783][ T6772] Code: Bad RIP value.
[   46.784788][ T6772] RSP: 002b:00007fffd08302b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[   46.784796][ T6772] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440459
[   46.784801][ T6772] RDX: 0000000000001006 RSI: 0000000020000240 RDI: 0000000000000004
[   46.784806][ T6772] RBP: 00000000006cb018 R08: 000000000000000e R09: 00000000004002c8
[   46.784812][ T6772] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401d40
[   46.784817][ T6772] R13: 0000000000401dd0 R14: 0000000000000000 R15: 0000000000000000
[   46.784825][ T6772] Modules linked in:
[   46.784837][ T6772] ---[ end trace f189c63f77d941ee ]---
[   46.784847][ T6772] RIP: 0010:do_con_write+0x1a6a/0xf2d0
[   46.784855][ T6772] Code: 02 00 00 48 8b 7c 24 60 49 89 ff 49 c1 ef 03 43 80 3c 2f 00 74 0a e8 05 02 b2 fd 48 8b 7c 24 60 48 8b 1f 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c5 02 00 00 66 44 89 33 48 c7 c7 64 2c
[   46.784860][ T6772] RSP: 0018:ffffc90000f87900 EFLAGS: 00010203
[   46.784867][ T6772] RAX: 0000000020000001 RBX: 000000010000000c RCX: ffff88809256e4c0
[   46.784873][ T6772] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a73353f0
[   46.784878][ T6772] RBP: ffffc90000f87be8 R08: ffffffff84017411 R09: ffffffff83ffa040
[   46.784884][ T6772] R10: 0000000000000006 R11: ffff88809256e4c0 R12: ffff8880a7335000
[   46.784890][ T6772] R13: dffffc0000000000 R14: 00000000000007fe R15: 1ffff11014e66a7e
[   46.784897][ T6772] FS:  0000000000eb5880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   46.784903][ T6772] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   46.784908][ T6772] CR2: 00000000004553a0 CR3: 00000000994c8000 CR4: 00000000001406f0
[   46.784919][ T6772] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   46.784924][ T6772] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   46.784929][ T6772] Kernel panic - not syncing: Fatal exception
[   46.785943][ T6772] Kernel Offset: disabled
[   47.213985][ T6772] Rebooting in 86400 seconds..