[  OK  ] Started Getty on tty2.
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Serial Getty on ttyS0.
[  OK  ] Started Getty on tty1.
[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.118' (ECDSA) to the list of known hosts.
executing program
executing program
syzkaller login: [   58.515810][    T0] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
[   58.515820][    T0] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
[   58.515832][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.8.0-rc4-syzkaller #0
[   58.515839][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   58.515859][    T0] RIP: 0010:__switch_to_asm+0x0/0x40
[   58.515871][    T0] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   58.515878][    T0] RSP: 0018:ffffffff89a07ce8 EFLAGS: 00010046
[   58.515888][    T0] RAX: dffffc0000000000 RBX: ffff8880ae635e18 RCX: 0000000000000000
[   58.515896][    T0] RDX: 1ffff11015cc6bc2 RSI: ffff888096292540 RDI: ffffffff89a86580
[   58.515904][    T0] RBP: ffffffff89a07db8 R08: 0000000000000001 R09: ffffffff89a86e48
[   58.515914][    T0] R10: fffffbfff155cb69 R11: 0000000000000000 R12: ffff8880ae635e00
[   58.515922][    T0] R13: ffffffff89a86580 R14: ffff888096292540 R15: ffffffff89a869b0
[   58.515932][    T0] FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
[   58.515940][    T0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   58.515948][    T0] CR2: 00007ffee04c88b4 CR3: 000000009e2e0000 CR4: 00000000001406f0
[   58.515958][    T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   58.515965][    T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   58.515968][    T0] Call Trace:
[   58.515984][    T0]  __schedule+0x8e1/0x1eb0
[   58.516001][    T0]  ? io_schedule_timeout+0x140/0x140
[   58.516016][    T0]  ? lockdep_hardirqs_on_prepare+0x3a2/0x590
[   58.516028][    T0]  ? trace_hardirqs_on+0x5f/0x220
[   58.516041][    T0]  ? lockdep_hardirqs_on+0x6a/0xe0
[   58.516056][    T0]  schedule_idle+0x53/0x90
[   58.516069][    T0]  do_idle+0x323/0x6d0
[   58.516084][    T0]  ? arch_cpu_idle_exit+0x70/0x70
[   58.516101][    T0]  ? trace_init_perf_perm_irq_work_exit+0xe/0xe
[   58.516115][    T0]  cpu_startup_entry+0x14/0x20
[   58.516129][    T0]  start_kernel+0x9cb/0xa06
[   58.516144][    T0]  ? mem_encrypt_init+0x5/0x5
[   58.516171][    T0]  ? x86_cpuid_vendor+0x84/0x90
[   58.516186][    T0]  ? __sanitizer_cov_trace_switch+0x45/0x70
[   58.516215][    T0]  ? load_ucode_bsp+0x1b7/0x1f7
[   58.516229][    T0]  secondary_startup_64+0xa4/0xb0
[   58.516238][    T0] Modules linked in:
[   58.516259][    T0] ---[ end trace 7e4dd833478acc2a ]---
[   58.516273][    T0] RIP: 0010:__switch_to_asm+0x0/0x40
[   58.516291][    T0] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   58.516298][    T0] RSP: 0018:ffffffff89a07ce8 EFLAGS: 00010046
[   58.516307][    T0] RAX: dffffc0000000000 RBX: ffff8880ae635e18 RCX: 0000000000000000
[   58.516315][    T0] RDX: 1ffff11015cc6bc2 RSI: ffff888096292540 RDI: ffffffff89a86580
[   58.516323][    T0] RBP: ffffffff89a07db8 R08: 0000000000000001 R09: ffffffff89a86e48
[   58.516330][    T0] R10: fffffbfff155cb69 R11: 0000000000000000 R12: ffff8880ae635e00
[   58.516338][    T0] R13: ffffffff89a86580 R14: ffff888096292540 R15: ffffffff89a869b0
[   58.516348][    T0] FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
[   58.516355][    T0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   58.516363][    T0] CR2: 00007ffee04c88b4 CR3: 000000009e2e0000 CR4: 00000000001406f0
[   58.516372][    T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   58.516379][    T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   58.516385][    T0] Kernel panic - not syncing: Fatal exception
[   58.517683][    T0] Kernel Offset: disabled
[   58.878272][    T0] Rebooting in 86400 seconds..