BUG: unable to handle kernel paging request at ffff88808afdb000 #PF error: [PROT] [WRITE] [RSVD] PGD c201067 P4D c201067 PUD 21ffff067 PMD 800000008ae001e3 Oops: 000b [#1] PREEMPT SMP KASAN CPU: 1 PID: 21904 Comm: syz-executor1 Not tainted 5.0.0-rc4-next-20190130 #22 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: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:ffff88808ef3f510 EFLAGS: 00010a02 RAX: dffffc0000000000 RBX: 1ffff11011de7ea8 RCX: ffffffff8111441b RDX: 1ffff110115fb600 RSI: ffffffff81114444 RDI: 0000000000000007 RBP: ffff88808ef3f5c8 R08: ffff88808e744280 R09: ffffed1015ce5b80 R10: ffffed1015ce5b7f R11: ffff8880ae72dbfb R12: ffff88808afdb000 R13: 1ffff11011de7ea4 R14: 0000000000000000 R15: ffff88808ef3f5a0 FS: 0000000001538940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88808afdb000 CR3: 0000000088cff000 CR4: 00000000001426e0 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:5844 [inline] kvm_mmu_invalidate_zap_all_pages+0x53e/0x710 arch/x86/kvm/mmu.c:5885 kvm_arch_flush_shadow_all+0x16/0x20 arch/x86/kvm/x86.c:9458 kvm_mmu_notifier_release+0x63/0xb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:494 mmu_notifier_unregister+0x1dd/0x620 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: 0033:0x411e51 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:00007ffe88938dd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 0000000000411e51 RDX: 0000000000000000 RSI: 0000000000740920 RDI: 0000000000000007 RBP: 0000000000000000 R08: 0000000000740918 R09: 0000000000000000 R10: 00007ffe88938cf0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000000001a2 R15: 0000000000000001 Modules linked in: CR2: ffff88808afdb000 ---[ end trace f3bc7857a59515d5 ]--- RIP: 0010:__write_once_size include/linux/compiler.h:224 [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:ffff88808ef3f510 EFLAGS: 00010a02 RAX: dffffc0000000000 RBX: 1ffff11011de7ea8 RCX: ffffffff8111441b RDX: 1ffff110115fb600 RSI: ffffffff81114444 RDI: 0000000000000007 RBP: ffff88808ef3f5c8 R08: ffff88808e744280 R09: ffffed1015ce5b80 R10: ffffed1015ce5b7f R11: ffff8880ae72dbfb R12: ffff88808afdb000 R13: 1ffff11011de7ea4 R14: 0000000000000000 R15: ffff88808ef3f5a0 FS: 0000000001538940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88808afdb000 CR3: 0000000088cff000 CR4: 00000000001426e0