BUG: unable to handle kernel paging request at ffff88804c3ea000
#PF error: [PROT] [WRITE] [RSVD]
PGD b201067 P4D b201067 PUD 5ec77063 PMD 800000004c2001e3 
Oops: 000b [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10400 Comm: syz-executor1 Not tainted 5.0.0-rc5+ #61
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop5' (00000000ad750554): kobject_uevent_env
RIP: 0010:__write_once_size include/linux/compiler.h:220 [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+0x18a/0x250 arch/x86/kvm/mmu.c:2618
Code: 8b 73 28 4c 89 e7 48 83 c6 48 e8 b1 3f ff ff 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 a4 00 00 00 <49> c7 04 24 00 00 00 00 41 be 01 00 00 00 e9 fd fe ff ff e8 3e 46
kobject: 'loop5' (00000000ad750554): kobject_uevent_env
RSP: 0018:ffff8880569bfb40 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffea0002a2be00 RCX: ffffc90008008000
RDX: 1ffff1100987d400 RSI: ffffffff810ed4f4 RDI: 0000000000000007
RBP: ffff8880569bfb68 R08: ffff8880a01ce440 R09: ffffed1015d05bd0
kobject: 'loop5' (00000000ad750554): fill_kobj_path: path = '/devices/virtual/block/loop5'
R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff88804c3ea000
R13: 0000000000000004 R14: ffffc90014f44000 R15: 0000000000000000
FS:  00007fe3c725a700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88804c3ea000 CR3: 000000009bf5d000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kobject: 'loop0' (00000000d8ad9ae3): kobject_uevent_env
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+0x163/0x1170 arch/x86/kvm/mmu.c:2679
kobject: 'loop0' (00000000d8ad9ae3): fill_kobj_path: path = '/devices/virtual/block/loop0'
 kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5844 [inline]
 kvm_mmu_invalidate_zap_all_pages+0x3ca/0x550 arch/x86/kvm/mmu.c:5885
 kvm_arch_flush_shadow_all+0x16/0x20 arch/x86/kvm/x86.c:9458
kobject: 'loop5' (00000000ad750554): fill_kobj_path: path = '/devices/virtual/block/loop5'
 kvm_mmu_notifier_release+0x5c/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:494
 mmu_notifier_unregister+0x137/0x410 mm/mmu_notifier.c:356
kobject: 'loop2' (00000000614d07e3): kobject_uevent_env
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:744 [inline]
 kvm_put_kvm+0x553/0xc70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:769
kobject: 'loop2' (00000000614d07e3): fill_kobj_path: path = '/devices/virtual/block/loop2'
 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2495
 __fput+0x2df/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
kobject: 'loop3' (000000000ee62367): kobject_uevent_env
 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
kobject: 'loop3' (000000000ee62367): fill_kobj_path: path = '/devices/virtual/block/loop3'
RIP: 0033:0x457ca7
Code: 48 83 c4 08 48 89 d8 5b 5d c3 66 0f 1f 84 00 00 00 00 00 48 89 e8 48 f7 d8 48 39 c3 0f 92 c0 eb 92 66 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe3c7258098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
kobject: 'loop3' (000000000ee62367): kobject_uevent_env
RAX: 0000000000000000 RBX: 0000000000000018 RCX: 0000000000457ca7
RDX: 00007fe3c72586f0 RSI: 000000008138ae83 RDI: 0000000000000005
RBP: 0000000020017000 R08: 00007fe3c72580a0 R09: 000000000073bf00
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000
R13: 00000000ffffffff R14: 00000000004dbaa8 R15: 00000000ffffffff
kobject: 'loop3' (000000000ee62367): fill_kobj_path: path = '/devices/virtual/block/loop3'
Modules linked in:
CR2: ffff88804c3ea000
---[ end trace edc2667853f19a59 ]---
RIP: 0010:__write_once_size include/linux/compiler.h:220 [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+0x18a/0x250 arch/x86/kvm/mmu.c:2618
Code: 8b 73 28 4c 89 e7 48 83 c6 48 e8 b1 3f ff ff 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 a4 00 00 00 <49> c7 04 24 00 00 00 00 41 be 01 00 00 00 e9 fd fe ff ff e8 3e 46
RSP: 0018:ffff8880569bfb40 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffea0002a2be00 RCX: ffffc90008008000
RDX: 1ffff1100987d400 RSI: ffffffff810ed4f4 RDI: 0000000000000007
RBP: ffff8880569bfb68 R08: ffff8880a01ce440 R09: ffffed1015d05bd0
R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff88804c3ea000
R13: 0000000000000004 R14: ffffc90014f44000 R15: 0000000000000000
FS:  00007fe3c725a700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88804c3ea000 CR3: 000000009bf5d000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400