BTRFS info (device loop1): disabling disk space caching
BTRFS info (device loop1): force zlib compression
BTRFS info (device loop1): turning on flush-on-commit
BTRFS info (device loop1): has skinny extents
BUG: unable to handle kernel paging request at fffffffffffffc46
IP: mm_update_next_owner+0x32f/0x5b0 kernel/exit.c:449
PGD 8e6b067 P4D 8e6b067 PUD 8e6d067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 15618 Comm: syz-executor.1 Not tainted 4.14.231-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880451726c0 task.stack: ffff8882312a8000
RIP: 0010:mm_update_next_owner+0x32f/0x5b0 kernel/exit.c:449
RSP: 0018:ffff8882312afd48 EFLAGS: 00010246
RAX: 0000000000000007 RBX: dffffc0000000000 RCX: 0000000000001872
RDX: 0000000000000000 RSI: 0000000000000100 RDI: fffffffffffffc44
RBP: 0000000000000000 R08: ffff8880001666f0 R09: 000000000006008a
R10: ffff888045172f48 R11: ffff8880451726c0 R12: ffff88809fdce6c0
R13: ffff888045a38e50 R14: ffff8880451726c0 R15: 0000077007070707
FS:  0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffc46 CR3: 0000000095996000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 exit_mm kernel/exit.c:547 [inline]
 do_exit+0x97c/0x2850 kernel/exit.c:855
 do_group_exit+0x100/0x2e0 kernel/exit.c:965
 SYSC_exit_group kernel/exit.c:976 [inline]
 SyS_exit_group+0x19/0x20 kernel/exit.c:974
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007ffec91fbaa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000466459
RDX: 000000000041926b RSI: ffffffffffffffbc RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffec91fbba0
Code: c8 72 23 00 48 8d bd 44 fc ff ff 48 89 f8 48 c1 e8 03 0f b6 14 18 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d5 01 00 00 <f6> 85 46 fc ff ff 20 75 87 e8 93 72 23 00 48 8d bd 20 03 00 00 
RIP: mm_update_next_owner+0x32f/0x5b0 kernel/exit.c:449 RSP: ffff8882312afd48
CR2: fffffffffffffc46
---[ end trace 91b56b4e5e43a12f ]---