BUG: unable to handle kernel paging request at ffff8801d9b96000 PGD bc01067 P4D bc01067 PUD 1d9409063 PMD 80000001d9a001e3 Oops: 000b [#1] PREEMPT SMP KASAN CPU: 0 PID: 19854 Comm: syz-executor2 Not tainted 4.19.0-rc7+ #276 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__update_clear_spte_fast include/linux/compiler.h:215 [inline] RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:819 [inline] RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:1998 [inline] RIP: 0010:mmu_page_zap_pte+0x295/0x390 arch/x86/kvm/mmu.c:2576 Code: 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c7 85 58 ff ff ff 00 00 00 00 48 c1 ea 03 80 3c 02 00 0f 85 d4 00 00 00 48 c1 eb 03 <49> c7 45 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 be 01 00 RSP: 0018:ffff880181a7f1d8 EFLAGS: 00010a02 RAX: dffffc0000000000 RBX: 1ffff1003034fe40 RCX: ffffc90004bc5000 RDX: 1ffff1003b372c00 RSI: ffffffff8111178b RDI: 0000000000000007 RBP: ffff880181a7f2a8 R08: ffff88017ec1c240 R09: fffff5200229c33a R10: fffff5200229c33a R11: ffffc900114e19d3 R12: 1ffff1003034fe3c R13: ffff8801d9b96000 R14: 0000000000000004 R15: 0000000000000000 FS: 00007f43b95a9700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8801d9b96000 CR3: 0000000189b86000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kvm_mmu_page_unlink_children arch/x86/kvm/mmu.c:2593 [inline] kvm_mmu_prepare_zap_page+0x1f9/0x1510 arch/x86/kvm/mmu.c:2637 kobject: 'loop0' (00000000a4b87a0f): kobject_uevent_env kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5736 [inline] kvm_mmu_invalidate_zap_all_pages+0x348/0x7b0 arch/x86/kvm/mmu.c:5777 kobject: 'loop0' (00000000a4b87a0f): fill_kobj_path: path = '/devices/virtual/block/loop0' kvm_arch_flush_shadow_all+0x15/0x20 arch/x86/kvm/x86.c:9215 kvm_mmu_notifier_release+0x59/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:497 mmu_notifier_unregister+0x1ff/0x600 mm/mmu_notifier.c:396 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:748 [inline] kvm_put_kvm+0x6c0/0xff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:773 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2407 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 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+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4573e7 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 7d b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f43b95a7098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 0000000000000018 RCX: 00000000004573e7 RDX: 00007f43b95a76f0 RSI: 000000008138ae83 RDI: 0000000000000005 RBP: 0000000020017000 R08: 0000000000000001 R09: 0000000000000028 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000 R13: 00000000ffffffff R14: 00000000004d7cf8 R15: 00000000ffffffff Modules linked in: CR2: ffff8801d9b96000 ---[ end trace 7642be491720d06f ]--- RIP: 0010:__update_clear_spte_fast include/linux/compiler.h:215 [inline] RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:819 [inline] RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:1998 [inline] RIP: 0010:mmu_page_zap_pte+0x295/0x390 arch/x86/kvm/mmu.c:2576 Code: 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c7 85 58 ff ff ff 00 00 00 00 48 c1 ea 03 80 3c 02 00 0f 85 d4 00 00 00 48 c1 eb 03 <49> c7 45 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 be 01 00 RSP: 0018:ffff880181a7f1d8 EFLAGS: 00010a02 RAX: dffffc0000000000 RBX: 1ffff1003034fe40 RCX: ffffc90004bc5000 RDX: 1ffff1003b372c00 RSI: ffffffff8111178b RDI: 0000000000000007 RBP: ffff880181a7f2a8 R08: ffff88017ec1c240 R09: fffff5200229c33a R10: fffff5200229c33a R11: ffffc900114e19d3 R12: 1ffff1003034fe3c R13: ffff8801d9b96000 R14: 0000000000000004 R15: 0000000000000000 FS: 00007f43b95a9700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8801d9b96000 CR3: 0000000189b86000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400