BUG: unable to handle kernel paging request at ffff888098ab4000
#PF error: [PROT] [WRITE] [RSVD]
PGD c201067 P4D c201067 PUD 21ffff067 PMD 8000000098a001e3 
Oops: 000b [#1] PREEMPT SMP KASAN
CPU: 1 PID: 17321 Comm: syz-executor4 Not tainted 5.0.0-rc2+ #33
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
------------[ cut here ]------------
RIP: 0010:__write_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:__update_clear_spte_fast arch/x86/kvm/mmu.c:547 [inline]
RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:848 [inline]
RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:2040 [inline]
RIP: 0010:mmu_page_zap_pte+0x2b8/0x3b0 arch/x86/kvm/mmu.c:2618
downgrading a read lock
WARNING: CPU: 0 PID: 8731 at kernel/locking/lockdep.c:3553 __lock_downgrade kernel/locking/lockdep.c:3553 [inline]
WARNING: CPU: 0 PID: 8731 at kernel/locking/lockdep.c:3553 lock_downgrade+0x4d2/0x910 kernel/locking/lockdep.c:3816
Code: 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 d1 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 eb 03 <49> c7 04 24 00 00 00 00 c6 04 03 f8 b8 01 00 00 00 e9 2d fe ff ff
Kernel panic - not syncing: panic_on_warn set ...
RSP: 0018:ffff888053c87518 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: 1ffff1100a790ea9 RCX: ffffffff8111404b
RDX: 1ffff11013156800 RSI: ffffffff81114074 RDI: 0000000000000007
RBP: ffff888053c875d0 R08: ffff8880a4ec4040 R09: ffffed1015ce5b90
R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: ffff888098ab4000
R13: 1ffff1100a790ea5 R14: 0000000000000000 R15: ffff888053c875a8
FS:  000000000213a940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888098ab4000 CR3: 00000000582c3000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kvm_mmu_page_unlink_children arch/x86/kvm/mmu.c:2635 [inline]
 kvm_mmu_prepare_zap_page+0x19d/0x1440 arch/x86/kvm/mmu.c:2679
 kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5843 [inline]
 kvm_mmu_invalidate_zap_all_pages+0x53e/0x710 arch/x86/kvm/mmu.c:5884
 kvm_arch_flush_shadow_all+0x16/0x20 arch/x86/kvm/x86.c:9456
 kvm_mmu_notifier_release+0x5c/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:494
 mmu_notifier_unregister+0x1dd/0x5e0 mm/mmu_notifier.c:356
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:744 [inline]
 kvm_put_kvm+0x6aa/0xff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:769
 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2495
 __fput+0x3c5/0xb10 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x696/0x800 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411e61
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 94 19 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:0000000000a4fd90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000411e61
RDX: 0000000000000000 RSI: 0000000000740960 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000740958 R09: 0000000000000000
R10: 0000000000a4fcb0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 000000000000010e R15: 0000000000000004
Modules linked in:
CR2: ffff888098ab4000
---[ end trace eb24a9b3065f8383 ]---
RIP: 0010:__write_once_size include/linux/compiler.h:218 [inline]
RIP: 0010:__update_clear_spte_fast arch/x86/kvm/mmu.c:547 [inline]
RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:848 [inline]
RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:2040 [inline]
RIP: 0010:mmu_page_zap_pte+0x2b8/0x3b0 arch/x86/kvm/mmu.c:2618
Code: 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 d1 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 eb 03 <49> c7 04 24 00 00 00 00 c6 04 03 f8 b8 01 00 00 00 e9 2d fe ff ff
RSP: 0018:ffff888053c87518 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: 1ffff1100a790ea9 RCX: ffffffff8111404b
RDX: 1ffff11013156800 RSI: ffffffff81114074 RDI: 0000000000000007
RBP: ffff888053c875d0 R08: ffff8880a4ec4040 R09: ffffed1015ce5b90
R10: ffffed1015ce5b8f R11: ffff8880ae72dc7b R12: ffff888098ab4000
R13: 1ffff1100a790ea5 R14: 0000000000000000 R15: ffff888053c875a8
FS:  000000000213a940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888098ab4000 CR3: 00000000582c3000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..