WARNING: CPU: 0 PID: 10889 at arch/x86/kvm/mmu.c:830 mmu_spte_clear_track_bits+0x43a/0x500 arch/x86/kvm/mmu.c:830 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 10889 Comm: syz-executor1 Not tainted 4.20.0-next-20190103 #5 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 panic+0x2cb/0x65c kernel/panic.c:214 __warn.cold+0x20/0x48 kernel/panic.c:571 report_bug+0x263/0x2b0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:mmu_spte_clear_track_bits+0x43a/0x500 arch/x86/kvm/mmu.c:830 Code: 45 89 67 90 31 ff 44 89 e6 48 ba 00 00 00 00 00 fc ff df c6 04 10 f8 e8 a4 da 70 00 45 85 e4 0f 85 74 fd ff ff e8 16 d9 70 00 <0f> 0b e9 68 fd ff ff e8 0a d9 70 00 4c 89 f7 e8 82 24 f7 ff 31 f6 RSP: 0018:ffff888085f1f3f0 EFLAGS: 00010293 RAX: ffff8880504ca080 RBX: 400000002664bc77 RCX: ffffffff811127dc RDX: 0000000000000000 RSI: ffffffff811127ea RDI: 0000000000000005 RBP: ffff888085f1f4c8 R08: ffff8880504ca080 R09: fffff9400013325f R10: fffff9400013325e R11: ffffea00009992f7 R12: 0000000000000000 R13: 1ffff11010be3e80 R14: 000000000002664b R15: ffff888085f1f4a0 drop_spte+0x24/0x220 arch/x86/kvm/mmu.c:1468 mmu_page_zap_pte+0x2e2/0x3b0 arch/x86/kvm/mmu.c:2613 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+0x5c/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:494 mmu_notifier_unregister+0x1dd/0x5e0 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:2491 __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: 0033:0x411c91 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:00007fffb455f9d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000411c91 RDX: 0000000000000000 RSI: 0000000000742648 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fffb455f900 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000373 R15: 0000000000000001 Kernel Offset: disabled Rebooting in 86400 seconds..