BUG: unable to handle kernel paging request at ffffffffffffff74
IP: wait_consider_task+0xa2/0x32a0 kernel/exit.c:1329
PGD 7e6d067 P4D 7e6d067 PUD 7e6f067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7529 Comm: syz-executor.3 Not tainted 4.14.170-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88806e4962c0 task.stack: ffff88806e498000
RIP: 0010:wait_consider_task+0xa2/0x32a0 kernel/exit.c:1329
RSP: 0018:ffff88806e49fae8 EFLAGS: 00010246
RAX: 0000000000000007 RBX: fffffffffffffaf8 RCX: ffffffffffffff74
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88806e49fcd8
RBP: ffff88806e49fbf0 R08: 0000000000000ec1 R09: ffffffff89556e88
R10: ffff88806e496b40 R11: ffff88806e4962c0 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88806e49fcd8 R15: ffff88806e49fcd8
FS:  0000000000d09940(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff74 CR3: 000000006e486000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1438 [inline]
 do_wait+0x3ee/0x930 kernel/exit.c:1509
 kernel_wait4+0x123/0x210 kernel/exit.c:1652
 SYSC_wait4+0x106/0x110 kernel/exit.c:1664
 SyS_wait4+0x2c/0x40 kernel/exit.c:1660
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4151da
RSP: 002b:00007ffcbd903ae8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000001acd33 RCX: 00000000004151da
RDX: 0000000040000001 RSI: 00007ffcbd903b20 RDI: ffffffffffffffff
RBP: 0000000000003386 R08: 0000000000000001 R09: 0000000000d09940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00007ffcbd903b20 R14: 00000000001accb1 R15: 00007ffcbd903b30
Code: 04 00 00 48 89 c8 48 89 8d 60 ff ff ff 48 c1 e8 03 42 0f b6 14 20 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 88 15 00 00 <44> 8b a3 7c 04 00 00 41 83 fc 10 0f 84 a3 00 00 00 e8 38 df 24 
RIP: wait_consider_task+0xa2/0x32a0 kernel/exit.c:1329 RSP: ffff88806e49fae8
CR2: ffffffffffffff74
---[ end trace ae3b15bd576555ab ]---