BUG: unable to handle kernel paging request at ffff8880a856f000
#PF error: [PROT] [WRITE] [RSVD]
PGD b201067 P4D b201067 PUD 21ffff067 PMD 80000000a84001e3 
Oops: 000b [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8456 Comm: syz-executor.3 Not tainted 5.0.0-rc8+ #89
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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 a1 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 ce 47
RSP: 0018:ffff88805502f748 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffea0002439880 RCX: ffffffff810ed72b
RDX: 1ffff110150ade00 RSI: ffffffff810ed754 RDI: 0000000000000007
RBP: ffff88805502f770 R08: ffff8880968965c0 R09: ffffed1015d25bd0
R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff8880a856f000
R13: 0000000000000004 R14: ffffc90012c8f000 R15: 0000000000000000
FS:  00007fc6fb124700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880a856f000 CR3: 00000000908d2000 CR4: 00000000001426e0
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
 kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5854 [inline]
 kvm_mmu_invalidate_zap_all_pages+0x3ca/0x550 arch/x86/kvm/mmu.c:5895
 kvm_arch_flush_shadow_all+0x16/0x20 arch/x86/kvm/x86.c:9465
 kvm_mmu_notifier_release+0x5c/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:494
 __mmu_notifier_release+0xed/0x3a0 mm/mmu_notifier.c:68
 mmu_notifier_release include/linux/mmu_notifier.h:232 [inline]
 exit_mmap+0x423/0x530 mm/mmap.c:3094
kobject: 'kvm' (00000000ed5c3743): kobject_uevent_env
kobject: 'kvm' (00000000ed5c3743): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 __mmput kernel/fork.c:1047 [inline]
 mmput+0x15f/0x4c0 kernel/fork.c:1068
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x838/0x2fd0 kernel/exit.c:862
 do_group_exit+0x135/0x370 kernel/exit.c:979
 get_signal+0x399/0x1d50 kernel/signal.c:2575
 do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162
 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: 0033:0x457e29
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:00007fc6fb123c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000009 RBX: 0000000000000003 RCX: 0000000000457e29
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000007
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc6fb1246d4
R13: 00000000004c093a R14: 00000000004d2750 R15: 00000000ffffffff
Modules linked in:
CR2: ffff8880a856f000
---[ end trace 90f0fb53afd4d99b ]---
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 a1 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 ce 47
RSP: 0018:ffff88805502f748 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffea0002439880 RCX: ffffffff810ed72b
RDX: 1ffff110150ade00 RSI: ffffffff810ed754 RDI: 0000000000000007
RBP: ffff88805502f770 R08: ffff8880968965c0 R09: ffffed1015d25bd0
R10: ffffed1015d25bcf R11: ffff8880ae92de7b R12: ffff8880a856f000
R13: 0000000000000004 R14: ffffc90012c8f000 R15: 0000000000000000
FS:  00007fc6fb124700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8880a856f000 CR3: 00000000908d2000 CR4: 00000000001426e0