Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.127' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   63.971742][ T8491] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor444/8491
[   63.981702][ T8491] caller is lockdep_hardirqs_on_prepare+0x5e/0x410
[   63.989049][ T8491] CPU: 0 PID: 8491 Comm: syz-executor444 Not tainted 5.10.0-rc1-syzkaller #0
[   63.997825][ T8491] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.007969][ T8491] Call Trace:
[   64.011249][ T8491]  dump_stack+0x107/0x163
[   64.015590][ T8491]  check_preemption_disabled+0x123/0x130
[   64.021218][ T8491]  lockdep_hardirqs_on_prepare+0x5e/0x410
[   64.026948][ T8491]  trace_hardirqs_on+0x5b/0x1c0
[   64.031800][ T8491]  __bad_area_nosemaphore+0xc6/0x400
[   64.037080][ T8491]  do_user_addr_fault+0x7d7/0xb40
[   64.042100][ T8491]  exc_page_fault+0x9e/0x180
[   64.046674][ T8491]  ? asm_exc_page_fault+0x8/0x30
[   64.051591][ T8491]  asm_exc_page_fault+0x1e/0x30
[   64.057387][ T8491] RIP: 0033:0x424260
[   64.061265][ T8491] 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
[   64.081152][ T8491] RSP: 002b:00007ffdffb769b8 EFLAGS: 00010246
[   64.088131][ T8491] RAX: 0000000000000000 RBX: 00007ffdffb769e0 RCX: 0000000000000000
[   64.096108][ T8491] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000
[   64.104164][ T8491] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
[   64.112115][ T8491] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401de0
[   64.120077][ T8491] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000
[   64.128229][ T8491] BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor444/8491
[   64.137657][ T8491] caller is lockdep_hardirqs_on+0x38/0x110
[   64.143497][ T8491] CPU: 0 PID: 8491 Comm: syz-executor444 Not tainted 5.10.0-rc1-syzkaller #0
[   64.152231][ T8491] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.162277][ T8491] Call Trace:
[   64.165563][ T8491]  dump_stack+0x107/0x163
[   64.169898][ T8491]  check_preemption_disabled+0x123/0x130
[   64.175508][ T8491]  ? __bad_area_nosemaphore+0xc6/0x400
[   64.180957][ T8491]  lockdep_hardirqs_on+0x38/0x110
[   64.185960][ T8491]  __bad_area_nosemaphore+0xc6/0x400
[   64.191258][ T8491]  do_user_addr_fault+0x7d7/0xb40
[   64.196442][ T8491]  exc_page_fault+0x9e/0x180
[   64.201012][ T8491]  ? asm_exc_page_fault+0x8/0x30
[   64.205951][ T8491]  asm_exc_page_fault+0x1e/0x30
[   64.210802][ T8491] RIP: 0033:0x424260
[   64.214678][ T8491] 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
[   64.234275][ T8491] RSP: 002b:00007ffdffb769b8 EFLAGS: 00010246
[   64.240430][ T8491] RAX: 0000000000000000 RBX: 00007ffdffb769e0 RCX: 0000000000000000
[   64.248389][ T8491] RDX: 0000000000000010 RSI: 000000000000000f RDI: 0000000000000000
[   64.256431][ T8491] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
[   64.264384][ T8491] R10: 0000000000000000 R11: 000000000000000f R12: 0000000000401de0
[   64.2