BUG: unable to handle kernel paging request at ffffffffffffff74
IP: wait_consider_task+0x99/0x3010 kernel/exit.c:1329
PGD 7a6d067 P4D 7a6d067 PUD 7a6f067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6358 Comm: syz-executor.4 Not tainted 4.14.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805a8d4080 task.stack: ffff88805a8d8000
RIP: 0010:wait_consider_task+0x99/0x3010 kernel/exit.c:1329
RSP: 0018:ffff88805a8dfb30 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffffffff74
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88805a8dfd08
RBP: dffffc0000000000 R08: 0000000000000ec1 R09: ffffffff89e5cf88
R10: ffff88805a8d4908 R11: ffff88805a8d4080 R12: ffff88805a8dfd08
R13: fffffffffffffaf8 R14: fffffffffffffaf8 R15: ffff88805a8dfd08
FS:  00000000028b4940(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff74 CR3: 000000005a8a4000 CR4: 00000000001426f0
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 kernel/exit.c:1664 [inline]
 SyS_wait4+0x106/0x110 kernel/exit.c:1660
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x41690a
RSP: 002b:00007ffc408ce4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000000d3acf RCX: 000000000041690a
RDX: 0000000040000001 RSI: 00007ffc408ce500 RDI: ffffffffffffffff
RBP: 0000000000000db1 R08: 0000000000000001 R09: 00000000028b4940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00007ffc408ce500 R14: 00000000000d3aa0 R15: 00007ffc408ce510
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 32 3d 24 00 
RIP: wait_consider_task+0x99/0x3010 kernel/exit.c:1329 RSP: ffff88805a8dfb30
CR2: ffffffffffffff74
---[ end trace d6ffc99f17188ee5 ]---