BUG: unable to handle kernel paging request at ffffffffffffff6c
PGD 9e6e067 P4D 9e6e067 PUD 9e70067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8148 Comm: syz-executor.1 Not tainted 4.19.161-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline]
RIP: 0010:wait_consider_task+0xae/0x3910 kernel/exit.c:1359
Code: 8e 6c 04 00 00 48 89 c8 48 89 4c 24 10 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 4b 1c 00 00 <45> 8b a6 6c 04 00 00 bf 10 00 00 00 44 89 e6 e8 0e 54 2b 00 41 83
RSP: 0018:ffff8880b367fb00 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffffffff6c
RDX: 0000000000000000 RSI: ffffffff81397d12 RDI: ffff8880b367fd00
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b367fd00
R13: ffff888093dae080 R14: fffffffffffffb00 R15: ffff888093dae570
FS:  00000000021bc940(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 000000009afb7000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1468 [inline]
 do_wait+0x429/0x9c0 kernel/exit.c:1539
 kernel_wait4+0x14c/0x260 kernel/exit.c:1681
 __do_sys_wait4 kernel/exit.c:1693 [inline]
 __se_sys_wait4+0x149/0x160 kernel/exit.c:1689
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x417aab
Code: 54 55 41 89 d4 53 48 89 f5 89 fb 48 83 ec 10 e8 7b f9 ff ff 45 31 d2 41 89 c0 49 63 d4 48 89 ee 48 63 fb b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 19 44 89 c7 89 44 24 0c e8 b1 f9 ff ff 8b 44
RSP: 002b:00007ffd4b461650 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 0000000000417aab
RDX: 0000000040000001 RSI: 00007ffd4b4616b0 RDI: ffffffffffffffff
RBP: 00007ffd4b4616b0 R08: 0000000000000000 R09: 00000000021bc940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000040000001
R13: 00007ffd4b4616b0 R14: 00000000001513dc R15: 00007ffd4b4616c0
Modules linked in:
CR2: ffffffffffffff6c
---[ end trace c21af2c1cd6bf817 ]---
RIP: 0010:__read_once_size include/linux/compiler.h:193 [inline]
RIP: 0010:wait_consider_task+0xae/0x3910 kernel/exit.c:1359
Code: 8e 6c 04 00 00 48 89 c8 48 89 4c 24 10 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 4b 1c 00 00 <45> 8b a6 6c 04 00 00 bf 10 00 00 00 44 89 e6 e8 0e 54 2b 00 41 83
RSP: 0018:ffff8880b367fb00 EFLAGS: 00010246
RAX: 0000000000000007 RBX: 0000000000000000 RCX: ffffffffffffff6c
RDX: 0000000000000000 RSI: ffffffff81397d12 RDI: ffff8880b367fd00
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b367fd00
R13: ffff888093dae080 R14: fffffffffffffb00 R15: ffff888093dae570
FS:  00000000021bc940(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff6c CR3: 000000009afb7000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400