BUG: unable to handle kernel paging request at ffff888059d55000
#PF error: [PROT] [WRITE] [RSVD]
PGD b201067 P4D b201067 PUD 891dd063 PMD 8000000059c001e3 
Oops: 000b [#1] PREEMPT SMP KASAN
CPU: 1 PID: 22813 Comm: syz-executor.0 Not tainted 5.0.0-next-20190306 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__write_once_size include/linux/compiler.h:224 [inline]
RIP: 0010:__update_clear_spte_fast arch/x86/kvm/mmu.c:558 [inline]
RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:859 [inline]
RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:2051 [inline]
RIP: 0010:kvm_mmu_unlink_parents arch/x86/kvm/mmu.c:2645 [inline]
RIP: 0010:__kvm_mmu_prepare_zap_page+0x1ee/0x11a0 arch/x86/kvm/mmu.c:2683
Code: 88 6c 60 00 48 89 de 4c 89 e7 e8 ad ad fe ff 4c 89 e0 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 08 00 0f 85 a5 0d 00 00 <49> c7 04 24 00 00 00 00 e8 55 6c 60 00 4c 89 ea 4c 89 fe 48 89 df
RSP: 0018:ffff88809108faf0 EFLAGS: 00010246
RAX: 1ffff1100b3aaa00 RBX: ffff8880a801bf20 RCX: dffffc0000000000
RDX: 0000000000008581 RSI: ffffffff810ed5f4 RDI: 0000000000000007
RBP: ffff88809108fbd0 R08: ffff8880876e63c0 R09: ffffed1009bc199a
R10: ffffed1009bc1999 R11: ffff88804de0cccb R12: ffff888059d55000
R13: ffff88809108fb70 R14: ffffc900131d9000 R15: ffff88809108fb68
FS:  00007fd45949a700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888059d55000 CR3: 0000000051118000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __kvm_mmu_zap_all+0x1f6/0x350 arch/x86/kvm/mmu.c:5866
 kvm_mmu_zap_all+0x18/0x20 arch/x86/kvm/mmu.c:5880
 kvm_arch_flush_shadow_all+0x16/0x20 arch/x86/kvm/x86.c:9473
 kvm_mmu_notifier_release+0x63/0xb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:499
 mmu_notifier_unregister+0x137/0x440 mm/mmu_notifier.c:356
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:745 [inline]
 kvm_put_kvm+0x553/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:770
 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2500
 __fput+0x2e5/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 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+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457f29
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd459499c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000457f29
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd45949a6d4
R13: 00000000004c0e61 R14: 00000000004d2cb8 R15: 00000000ffffffff
Modules linked in:
CR2: ffff888059d55000
---[ end trace 5a0b5bd4f023da96 ]---
RIP: 0010:__write_once_size include/linux/compiler.h:224 [inline]
RIP: 0010:__update_clear_spte_fast arch/x86/kvm/mmu.c:558 [inline]
RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:859 [inline]
RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:2051 [inline]
RIP: 0010:kvm_mmu_unlink_parents arch/x86/kvm/mmu.c:2645 [inline]
RIP: 0010:__kvm_mmu_prepare_zap_page+0x1ee/0x11a0 arch/x86/kvm/mmu.c:2683
Code: 88 6c 60 00 48 89 de 4c 89 e7 e8 ad ad fe ff 4c 89 e0 48 b9 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 08 00 0f 85 a5 0d 00 00 <49> c7 04 24 00 00 00 00 e8 55 6c 60 00 4c 89 ea 4c 89 fe 48 89 df
RSP: 0018:ffff88809108faf0 EFLAGS: 00010246
RAX: 1ffff1100b3aaa00 RBX: ffff8880a801bf20 RCX: dffffc0000000000
RDX: 0000000000008581 RSI: ffffffff810ed5f4 RDI: 0000000000000007
RBP: ffff88809108fbd0 R08: ffff8880876e63c0 R09: ffffed1009bc199a
R10: ffffed1009bc1999 R11: ffff88804de0cccb R12: ffff888059d55000
R13: ffff88809108fb70 R14: ffffc900131d9000 R15: ffff88809108fb68
FS:  00007fd45949a700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888059d55000 CR3: 0000000051118000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400