BUG: unable to handle kernel paging request at ffffffffffffff74
IP: wait_consider_task+0x96/0x3350 kernel/exit.c:1336
PGD 7c6d067 P4D 7c6d067 PUD 7c6f067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 6367 Comm: syz-executor.5 Not tainted 4.14.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88806235e6c0 task.stack: ffff888062360000
RIP: 0010:wait_consider_task+0x96/0x3350 kernel/exit.c:1336
RSP: 0018:ffff888062367b40 EFLAGS: 00010246
RAX: 0000000000000007 RBX: fffffffffffffaf8 RCX: 0000000000000ec1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888062367d18
RBP: dffffc0000000000 R08: ffffffff8a071f88 R09: 000000000006008f
R10: ffff88806235ef48 R11: ffff88806235e6c0 R12: ffff888062367d18
R13: ffff88806235e6c0 R14: ffff888062367d18 R15: ffffffffffffff74
FS:  0000000001ee0940(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff74 CR3: 0000000062345000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1445 [inline]
 do_wait+0x3e9/0x930 kernel/exit.c:1516
 kernel_wait4+0x107/0x1e0 kernel/exit.c:1658
 SYSC_wait4 kernel/exit.c:1670 [inline]
 SyS_wait4+0xfe/0x110 kernel/exit.c:1666
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x41618a
RSP: 002b:00007ffcfe361aa8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000000904be RCX: 000000000041618a
RDX: 0000000040000001 RSI: 00007ffcfe361ae0 RDI: ffffffffffffffff
RBP: 00000000000009a5 R08: 0000000000000001 R09: 0000000001ee0940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffcfe361ae0 R14: 00000000000903a2 R15: 00007ffcfe361af0
Code: 40 08 00 f3 f3 f3 e8 9a c1 24 00 4c 89 f8 48 c1 e8 03 0f b6 14 28 4c 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d1 17 00 00 <44> 8b a3 7c 04 00 00 41 83 fc 10 0f 84 a1 00 00 00 e8 64 c1 24 
RIP: wait_consider_task+0x96/0x3350 kernel/exit.c:1336 RSP: ffff888062367b40
CR2: ffffffffffffff74
do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff81370ab0>] do_wait+0x300/0x930 kernel/exit.c:1542
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WARNING: CPU: 0 PID: 6367 at kernel/sched/core.c:5988 __might_sleep.cold+0x9f/0xb4 kernel/sched/core.c:5988