BUG: unable to handle kernel paging request at fffffffffffffe90
PGD 9e6e067 P4D 9e6e067 PUD 9e70067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16852 Comm: syz-executor.1 Not tainted 4.19.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mm_update_next_owner+0x444/0x650 kernel/exit.c:453
Code: 70 fa ff ff 49 39 c5 0f 84 df fe ff ff e8 e4 9b 29 00 4c 8d 85 20 04 00 00 4c 89 c0 48 c1 e8 03 80 3c 18 00 0f 85 18 01 00 00 <4c> 8b bd 20 04 00 00 4d 39 e7 75 95 e9 12 fd ff ff e8 b6 9b 29 00
RSP: 0018:ffff888227c5fd50 EFLAGS: 00010246
RAX: 1fffffffffffffd2 RBX: dffffc0000000000 RCX: ffffffff8138c29e
RDX: 0000000000000000 RSI: ffffffff8138c33c RDI: ffff8880001325d0
RBP: fffffffffffffa70 R08: fffffffffffffe90 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff888069762780
R13: ffff88808d74c0d0 R14: ffff8880b5344340 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffe90 CR3: 0000000226f13000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 exit_mm kernel/exit.c:548 [inline]
 do_exit+0xae4/0x2be0 kernel/exit.c:857
 do_group_exit+0x125/0x310 kernel/exit.c:967
 __do_sys_exit_group kernel/exit.c:978 [inline]
 __se_sys_exit_group kernel/exit.c:976 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465ef9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdb40c4308 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000465ef9
RDX: 000000000041920b RSI: ffffffffffffffbc RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000001b2dd201d8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffdb40c4400
Modules linked in:
CR2: fffffffffffffe90
---[ end trace 841ebf82b0d4c607 ]---
BUG: unable to handle kernel paging request at fffffffffffffe90
RIP: 0010:mm_update_next_owner+0x444/0x650 kernel/exit.c:453
PGD 9e6e067 P4D 9e6e067 PUD 9e70067 PMD 0 
Code: 70 fa ff ff 49 39 c5 0f 84 df fe ff ff e8 e4 9b 29 00 4c 8d 85 20 04 00 00 4c 89 c0 48 c1 e8 03 80 3c 18 00 0f 85 18 01 00 00 <4c> 8b bd 20 04 00 00 4d 39 e7 75 95 e9 12 fd ff ff e8 b6 9b 29 00
Oops: 0000 [#2] PREEMPT SMP KASAN
RSP: 0018:ffff888227c5fd50 EFLAGS: 00010246
CPU: 0 PID: 16871 Comm: syz-executor.4 Tainted: G      D           4.19.176-syzkaller #0
RAX: 1fffffffffffffd2 RBX: dffffc0000000000 RCX: ffffffff8138c29e
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RDX: 0000000000000000 RSI: ffffffff8138c33c RDI: ffff8880001325d0
RIP: 0010:mm_update_next_owner+0x444/0x650 kernel/exit.c:453
RBP: fffffffffffffa70 R08: fffffffffffffe90 R09: 0000000000000000
Code: 70 fa ff ff 49 39 c5 0f 84 df fe ff ff e8 e4 9b 29 00 4c 8d 85 20 04 00 00 4c 89 c0 48 c1 e8 03 80 3c 18 00 0f 85 18 01 00 00 <4c> 8b bd 20 04 00 00 4d 39 e7 75 95 e9 12 fd ff ff e8 b6 9b 29 00
R10: 0000000000000005 R11: 0000000000000000 R12: ffff888069762780
RSP: 0018:ffff888226e4fd50 EFLAGS: 00010246
R13: ffff88808d74c0d0 R14: ffff8880b5344340 R15: 0000000000000000
RAX: 1fffffffffffffd2 RBX: dffffc0000000000 RCX: ffffffff8138c29e
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
RDX: 0000000000000000 RSI: ffffffff8138c33c RDI: ffff8880001325d0
RBP: fffffffffffffa70 R08: fffffffffffffe90 R09: 0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880927b9480
CR2: fffffffffffffe90 CR3: 0000000226f13000 CR4: 00000000001406e0
R13: ffff88808d74c0d0 R14: ffff888083782340 R15: 0000000000000000
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffe90 CR3: 0000000233186000 CR4: 00000000001406f0