[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Update UTMP about System Runlevel Changes.
[  OK  ] Started Load/Save RF Kill Switch Status.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.90' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   64.437372][ T8484] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor509/8484
[   64.447070][ T8484] caller is lockdep_hardirqs_on_prepare+0x5e/0x410
[   64.454270][ T8484] CPU: 0 PID: 8484 Comm: syz-executor509 Not tainted 5.10.0-rc1-syzkaller #0
[   64.463401][ T8484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.473453][ T8484] Call Trace:
[   64.476746][ T8484]  dump_stack+0x107/0x163
[   64.481072][ T8484]  check_preemption_disabled+0x123/0x130
[   64.486732][ T8484]  lockdep_hardirqs_on_prepare+0x5e/0x410
[   64.492486][ T8484]  trace_hardirqs_on+0x5b/0x1c0
[   64.497329][ T8484]  __bad_area_nosemaphore+0xc6/0x400
[   64.502619][ T8484]  do_user_addr_fault+0x7d7/0xb40
[   64.507637][ T8484]  exc_page_fault+0x9e/0x180
[   64.512667][ T8484]  ? asm_exc_page_fault+0x8/0x30
[   64.517600][ T8484]  asm_exc_page_fault+0x1e/0x30
[   64.522454][ T8484] RIP: 0033:0x424260
[   64.527068][ T8484] 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
[   64.546805][ T8484] RSP: 002b:00007fff5fe7be98 EFLAGS: 00010246
[   64.552964][ T8484] RAX: 0000000000000000 RBX: 00007fff5fe7bec0 RCX: 0000000000000000
[   64.561377][ T8484] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000
[   64.569337][ T8484] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
[   64.577474][ T8484] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401de0
[   64.586488][ T8484] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000
[   64.594643][ T8484] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor509/8484
[   64.604170][ T8484] caller is lockdep_hardirqs_on+0x38/0x110
[   64.610093][ T8484] CPU: 0 PID: 8484 Comm: syz-executor509 Not tainted 5.10.0-rc1-syzkaller #0
[   64.618877][ T8484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.628939][ T8484] Call Trace:
[   64.632232][ T8484]  dump_stack+0x107/0x163
[   64.636566][ T8484]  check_preemption_disabled+0x123/0x130
[   64.642308][ T8484]  ? __bad_area_nosemaphore+0xc6/0x400
[   64.647767][ T8484]  lockdep_hardirqs_on+0x38/0x110
[   64.652781][ T8484]  __bad_area_nosemaphore+0xc6/0x400
[   64.658135][ T8484]  do_user_addr_fault+0x7d7/0xb40
[   64.663295][ T8484]  exc_page_fault+0x9e/0x180
[   64.667886][ T8484]  ? asm_exc_page_fault+0x8/0x30
[   64.672900][ T8484]  asm_exc_page_fault+0x1e/0x30
[   64.677753][ T8484] RIP: 0033:0x424260
[   64.681724][ T8484] 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
[   64.701331][ T8484] RSP: 002b:00007fff5fe7be98 EFLAGS: 00010246
[   64.707414][ T8484] RAX: 0000000000000000 RBX: 00007fff5fe7bec0 RCX: 0000000000000000
[   64.715480][ T8484] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000
[   64.723461][ T8484] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
[   64.731441][ T8484] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401