IPVS: ftp: loaded support on port[0] = 21 WARNING: CPU: 0 PID: 21977 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: 21977 Comm: syz-executor0 Not tainted 4.20.0+ #4 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/0x589 kernel/panic.c:189 __warn.cold+0x20/0x4b kernel/panic.c:544 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 kobject: 'lo' (000000000c3eb098): kobject_add_internal: parent: 'net', set: 'devices' 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 84 5d 70 00 45 85 e4 0f 85 74 fd ff ff e8 f6 5b 70 00 <0f> 0b e9 68 fd ff ff e8 ea 5b 70 00 4c 89 f7 e8 a2 24 f7 ff 31 f6 RSP: 0018:ffff88808d9b73f0 EFLAGS: 00010293 RAX: ffff8880a0bb45c0 RBX: 4000000032daac77 RCX: ffffffff811125ac RDX: 0000000000000000 RSI: ffffffff811125ba RDI: 0000000000000005 kobject: 'lo' (000000000c3eb098): kobject_uevent_env RBP: ffff88808d9b74c8 R08: ffff8880a0bb45c0 R09: fffff94000196d57 R10: fffff94000196d56 R11: ffffea0000cb6ab7 R12: 0000000000000000 R13: 1ffff11011b36e80 R14: 0000000000032daa R15: ffff88808d9b74a0 drop_spte+0x24/0x220 arch/x86/kvm/mmu.c:1468 mmu_page_zap_pte+0x2e2/0x3b0 arch/x86/kvm/mmu.c:2613 kobject: 'lo' (000000000c3eb098): fill_kobj_path: path = '/devices/virtual/net/lo' 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 kobject: 'queues' (000000000efdc8c6): kobject_add_internal: parent: 'lo', set: '' kobject: 'queues' (000000000efdc8c6): kobject_uevent_env kobject: 'queues' (000000000efdc8c6): kobject_uevent_env: filter function caused the event to drop! 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 kobject: 'rx-0' (0000000019e7d323): kobject_add_internal: parent: 'queues', set: 'queues' 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 kobject: 'rx-0' (0000000019e7d323): kobject_uevent_env mmu_notifier_unregister+0x1dd/0x5e0 mm/mmu_notifier.c:356 kobject: 'rx-0' (0000000019e7d323): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' 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 kobject: 'tx-0' (00000000ef7a4b83): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (00000000ef7a4b83): kobject_uevent_env kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2491 kobject: 'tx-0' (00000000ef7a4b83): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' __fput+0x3c5/0xb10 fs/file_table.c:278 kobject: 'tunl0' (000000007feda15f): kobject_add_internal: parent: 'net', set: 'devices' ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x1f4/0x2b0 kernel/task_work.c:113 kobject: 'tunl0' (000000007feda15f): kobject_uevent_env tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x32a/0x3b0 arch/x86/entry/common.c:166 kobject: 'tunl0' (000000007feda15f): fill_kobj_path: path = '/devices/virtual/net/tunl0' 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 kobject: 'queues' (000000000e925ecd): kobject_add_internal: parent: 'tunl0', set: '' 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:0000000000a4fd90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 kobject: 'queues' (000000000e925ecd): kobject_uevent_env RAX: 0000000000000000 RBX: 0000000000000006 RCX: 0000000000411c91 RDX: 0000000000000000 RSI: 0000000000741b90 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000741b88 R09: 0000000000000000 R10: 0000000000a4fcb0 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000000000000071c R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..