BUG: unable to handle kernel paging request at ffff888093e5e000 #PF error: [PROT] [WRITE] [RSVD] PGD c201067 P4D c201067 PUD 21ffff067 PMD 8000000093e001e3 Oops: 000b [#1] PREEMPT SMP KASAN CPU: 1 PID: 9561 Comm: syz-executor2 Not tainted 5.0.0-rc3-next-20190123 #18 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:ffff888059d4f510 EFLAGS: 00010a02 RAX: dffffc0000000000 RBX: 1ffff1100b3a9ea8 RCX: ffffc9000a426000 RDX: 1ffff110127cbc00 RSI: ffffffff81114434 RDI: 0000000000000007 RBP: ffff888059d4f5c8 R08: ffff88809084e600 R09: ffffed1015ce5b80 R10: ffffed1015ce5b7f R11: ffff8880ae72dbfb R12: ffff888093e5e000 R13: 1ffff1100b3a9ea4 R14: 0000000000000000 R15: ffff888059d4f5a0 FS: 00007f3fb1114700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888093e5e000 CR3: 000000005629c000 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+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: 0033:0x457f07 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 cd b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3fb1112098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 0000000000000018 RCX: 0000000000457f07 RDX: 00007f3fb11126f0 RSI: 000000008138ae83 RDI: 0000000000000005 RBP: 000000002003f000 R08: 00007f3fb11120a0 R09: 000000000073bf00 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000 R13: 00000000ffffffff R14: 00000000004dba70 R15: 00000000ffffffff Modules linked in: CR2: ffff888093e5e000 ---[ end trace 21bde121b66ba92e ]--- 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:ffff888059d4f510 EFLAGS: 00010a02 RAX: dffffc0000000000 RBX: 1ffff1100b3a9ea8 RCX: ffffc9000a426000 RDX: 1ffff110127cbc00 RSI: ffffffff81114434 RDI: 0000000000000007 RBP: ffff888059d4f5c8 R08: ffff88809084e600 R09: ffffed1015ce5b80 R10: ffffed1015ce5b7f R11: ffff8880ae72dbfb R12: ffff888093e5e000 R13: 1ffff1100b3a9ea4 R14: 0000000000000000 R15: ffff888059d4f5a0 FS: 00007f3fb1114700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888093e5e000 CR3: 000000005629c000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400