[  OK  ] Started Getty on tty3.
[  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 '10.128.0.215' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   62.112902][ T8457] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor512/8457
[   62.122334][ T8457] caller is lockdep_hardirqs_on_prepare+0x5e/0x410
[   62.128818][ T8457] CPU: 1 PID: 8457 Comm: syz-executor512 Not tainted 5.10.0-rc1-syzkaller #0
[   62.137549][ T8457] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   62.147579][ T8457] Call Trace:
[   62.150849][ T8457]  dump_stack+0x107/0x163
[   62.155176][ T8457]  check_preemption_disabled+0x123/0x130
[   62.160840][ T8457]  lockdep_hardirqs_on_prepare+0x5e/0x410
[   62.166535][ T8457]  trace_hardirqs_on+0x5b/0x1c0
[   62.171365][ T8457]  __bad_area_nosemaphore+0xc6/0x400
[   62.176669][ T8457]  do_user_addr_fault+0x7d7/0xb40
[   62.181675][ T8457]  exc_page_fault+0x9e/0x180
[   62.186240][ T8457]  ? asm_exc_page_fault+0x8/0x30
[   62.191152][ T8457]  asm_exc_page_fault+0x1e/0x30
[   62.195985][ T8457] RIP: 0033:0x424260
[   62.199861][ T8457] Code: 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 74 48 83 e0 f0 <66> 0f 74 00 66 0f 74 48 10 66 0f 74 50 20 66 0f 74 58 30 66 0f d7
[   62.219441][ T8457] RSP: 002b:00007fffe2494318 EFLAGS: 00010246
[   62.225486][ T8457] RAX: 0000000000000000 RBX: 00007fffe2494340 RCX: 0000000000000000
[   62.233433][ T8457] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000
[   62.241399][ T8457] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
[   62.249347][ T8457] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401de0
[   62.257314][ T8457] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000
[   62.265912][ T8457] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor512/8457
[   62.275314][ T8457] caller is lockdep_hardirqs_on+0x38/0x110
[   62.281158][ T8457] CPU: 1 PID: 8457 Comm: syz-executor512 Not tainted 5.10.0-rc1-syzkaller #0
[   62.289908][ T8457] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   62.299950][ T8457] Call Trace:
[   62.303222][ T8457]  dump_stack+0x107/0x163
[   62.307531][ T8457]  check_preemption_disabled+0x123/0x130
[   62.313155][ T8457]  ? __bad_area_nosemaphore+0xc6/0x400
[   62.318590][ T8457]  lockdep_hardirqs_on+0x38/0x110
[   62.323603][ T8457]  __bad_area_nosemaphore+0xc6/0x400
[   62.328876][ T8457]  do_user_addr_fault+0x7d7/0xb40
[   62.333880][ T8457]  exc_page_fault+0x9e/0x180
[   62.338446][ T8457]  ? asm_exc_page_fault+0x8/0x30
[   62.343359][ T8457]  asm_exc_page_fault+0x1e/0x30
[   62.348271][ T8457] RIP: 0033:0x424260
[   62.352144][ T8457] Code: 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 74 48 83 e0 f0 <66> 0f 74 00 66 0f 74 48 10 66 0f 74 50 20 66 0f 74 58 30 66 0f d7
[   62.371735][ T8457] RSP: 002b:00007fffe2494318 EFLAGS: 00010246
[   62.377794][ T8457] RAX: 0000000000000000 RBX: 00007fffe2494340 RCX: 0000000000000000
[   62.385751][ T8457] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000
[   62.393700][ T8457] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
[   62.401648][ T8457] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401de0
[   62.409595][ T8457] R13: 0000000000401e70 R14: 0000