misc userio: No port type given on /dev/userio
BUG: unable to handle kernel paging request at ffffffffffffff74
IP: wait_consider_task+0x99/0x3030 kernel/exit.c:1329
PGD 7c6d067 P4D 7c6d067 PUD 7c6f067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 6360 Comm: syz-executor.0 Not tainted 4.14.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88808173e040 task.stack: ffff888081740000
RIP: 0010:wait_consider_task+0x99/0x3030 kernel/exit.c:1329
RSP: 0018:ffff888081747b30 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffffffff74
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888081747d08
RBP: dffffc0000000000 R08: 0000000000000ec1 R09: ffffffff8a066e48
R10: ffff88808173e8c8 R11: ffff88808173e040 R12: ffff888081747d08
R13: fffffffffffffaf8 R14: fffffffffffffaf8 R15: ffff888081747d08
FS:  00000000020c9940(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff74 CR3: 000000008171f000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1438 [inline]
 do_wait+0x3e9/0x930 kernel/exit.c:1509
 kernel_wait4+0x103/0x1e0 kernel/exit.c:1652
 SYSC_wait4+0x106/0x110 kernel/exit.c:1664
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4166ca
RSP: 002b:00007ffdb4b1d348 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 000000000016e2e8 RCX: 00000000004166ca
RDX: 0000000040000001 RSI: 00007ffdb4b1d380 RDI: ffffffffffffffff
RBP: 0000000000001c99 R08: 0000000000000001 R09: 00000000020c9940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007ffdb4b1d380 R14: 000000000016e2c1 R15: 00007ffdb4b1d390
Code: 8d 8e 7c 04 00 00 48 89 c8 48 89 4c 24 08 48 c1 e8 03 0f b6 14 28 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e6 14 00 00 <41> 8b ae 7c 04 00 00 83 fd 10 0f 84 a1 00 00 00 e8 72 b0 23 00 
RIP: wait_consider_task+0x99/0x3030 kernel/exit.c:1329 RSP: ffff888081747b30
CR2: ffffffffffffff74
---[ end trace 51e49bbe2f00d953 ]---