https://bugzilla.kernel.org/show_bug.cgi?id=196685 --- Comment #8 from changbin.du@xxxxxxxxxxx --- If my code match yours, at least there 2 issues: First, kvm detected a warnning condition when delivering irq to guest. Second, the WARN caused a paging request oops when executing the trap handler of the UD0 instrunction. [36330.176867] BUG: unable to handle kernel paging request at ffffffffc0633f92 [36330.176888] IP: report_bug+0x94/0x120 [36330.176891] PGD 168c20c067 [36330.176893] P4D 168c20c067 [36330.176895] PUD 168c20e067 [36330.176898] PMD 2008194067 [36330.176901] PTE 80000020017bc161 [36330.176904] [36330.176911] Oops: 0003 [#1] SMP [36330.176913] Modules linked in: xt_recent xt_nat veth nls_utf8 udf crc_itu_t rfcomm ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat nf_nat_ipv4 br_netfilter overlay vmw_vsock_vmci_transport vsock vmw_vmci bridge stp llc bnep binfmt_misc nls_iso8859_1 snd_hda_codec_hdmi nvidia_uvm(POE) arc4 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec_realtek snd_hda_codec_generic crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc snd_hda_intel snd_hda_codec btusb btrtl btbcm btintel aesni_intel iwlmvm bluetooth nvidia_drm(POE) aes_x86_64 nvidia_modeset(POE) snd_hda_core crypto_simd input_leds usblp snd_hwdep hid_sony glue_helper joydev ff_memless ecdh_generic cryptd nvidia(POE) mac80211 snd_pcm intel_cstate drm_kms_helper snd_seq_midi [36330.176991] snd_seq_midi_event intel_rapl_perf drm snd_rawmidi iwlwifi fb_sys_fops mxm_wmi snd_seq syscopyarea sysfillrect sysimgblt snd_seq_device snd_timer cfg80211 snd mei_me mei lpc_ich soundcore shpchp wmi mac_hid kvm_intel kvm ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_multiport xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack libcrc32c iptable_filter ip_tables x_tables parport_pc ppdev lp parport autofs4 btrfs xor raid6_pq dm_mirror dm_region_hash dm_log vhost_net vhost tap vfio_pci vfio_virqfd irqbypass vfio_iommu_type1 vfio hid_logitech_hidpp [36330.177074] hid_logitech_dj hid_generic usbhid hid uas usb_storage igb e1000e dca ptp ahci i2c_algo_bit pps_core libahci [36330.177099] CPU: 13 PID: 8711 Comm: qemu-system-x86 Tainted: P OE 4.12.7-041207-generic #201708160856 [36330.177103] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./X99 Taichi, BIOS P1.10 06/29/2016 [36330.177107] task: ffff94808147c380 task.stack: ffffa46262f7c000 [36330.177114] RIP: 0010:report_bug+0x94/0x120 [36330.177118] RSP: 0018:ffffa46262f7f7a0 EFLAGS: 00010202 [36330.177123] RAX: 0000000000000907 RBX: ffffa46262f7f908 RCX: ffffffffc0633f88 [36330.177127] RDX: 0000000000000001 RSI: 0000000000001359 RDI: 0000000000000001 [36330.177130] RBP: ffffa46262f7f7c0 R08: ffffa46262f80000 R09: 00000000000003ce [36330.177134] R10: ffffffff83206a80 R11: fffff803741fea0f R12: ffffffffc0614073 [36330.177137] R13: ffffffffc0633a98 R14: 0000000000000004 R15: ffffa46262f7f908 [36330.177153] FS: 00007f5b08c67700(0000) GS:ffff94841f140000(0000) knlGS:00000000003f2000 [36330.177157] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [36330.177161] CR2: ffffffffc0633f92 CR3: 0000001c883de000 CR4: 00000000003426e0 [36330.177165] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [36330.177168] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [36330.177171] Call Trace: [36330.177186] ? vmx_deliver_posted_interrupt+0xe3/0xf0 [kvm_intel] [36330.177196] fixup_bug+0x2e/0x50 [36330.177203] do_trap+0x119/0x150 [36330.177209] do_error_trap+0x89/0x110 [36330.177218] ? vmx_deliver_posted_interrupt+0xe3/0xf0 [kvm_intel] [36330.177224] ? check_preempt_curr+0x74/0x80 [36330.177229] ? ttwu_do_wakeup+0x1e/0x140 [36330.177233] ? ttwu_do_activate+0x77/0x80 [36330.177240] do_invalid_op+0x20/0x30 [36330.177247] invalid_op+0x1e/0x30 [36330.177255] RIP: 0010:vmx_deliver_posted_interrupt+0xe3/0xf0 [kvm_intel] [36330.177259] RSP: 0018:ffffa46262f7f9b0 EFLAGS: 00010202 [36330.177263] RAX: 00000c0000f20003 RBX: ffff948081448000 RCX: 0000000000000000 [36330.177267] RDX: ffff94808814f1e0 RSI: 00000000000000d2 RDI: ffff948081448000 [36330.177270] RBP: ffffa46262f7f9b8 R08: 0000000000000000 R09: 0000000000000000 [36330.177273] R10: fffff8037400cf10 R11: fffff803741fea0f R12: 00000000000000d2 [36330.177277] R13: ffff94831fcf6700 R14: 0000000000000000 R15: ffff948081448000 [36330.177326] __apic_accept_irq+0x25b/0x300 [kvm] [36330.177351] kvm_apic_set_irq+0x2a/0x30 [kvm] [36330.177374] kvm_irq_delivery_to_apic+0x20b/0x2a0 [kvm] [36330.177396] kvm_lapic_reg_write+0x112/0x640 [kvm] [36330.177417] kvm_hv_vapic_msr_write+0x34/0x70 [kvm] [36330.177439] kvm_hv_set_msr_common+0x303/0x9d0 [kvm] [36330.177461] kvm_set_msr_common+0x64c/0xc30 [kvm] [36330.177484] ? x86_emulate_insn+0x161/0xdd0 [kvm] [36330.177491] vmx_set_msr+0xba/0x7d0 [kvm_intel] [36330.177510] kvm_set_msr+0x41/0x70 [kvm] [36330.177516] handle_wrmsr+0x59/0x140 [kvm_intel] [36330.177521] vmx_handle_exit+0xab/0xb40 [kvm_intel] [36330.177527] ? vmx_vcpu_run+0x2d7/0x460 [kvm_intel] [36330.177547] vcpu_enter_guest+0x440/0x1120 [kvm] [36330.177567] ? x86_emulate_instruction+0x586/0x6e0 [kvm] [36330.177573] ? __set_task_blocked+0x3c/0xa0 [36330.177594] kvm_arch_vcpu_ioctl_run+0x210/0x3f0 [kvm] [36330.177612] ? kvm_arch_vcpu_ioctl_run+0x210/0x3f0 [kvm] [36330.177628] kvm_vcpu_ioctl+0x2a6/0x620 [kvm] [36330.177633] ? do_futex+0x30a/0x510 [36330.177638] do_vfs_ioctl+0xa5/0x600 [36330.177657] ? kvm_on_user_return+0x6f/0xa0 [kvm] [36330.177661] SyS_ioctl+0x79/0x90 [36330.177665] entry_SYSCALL_64_fastpath+0x1e/0xa9 [36330.177668] RIP: 0033:0x7f5b27557f07 [36330.177670] RSP: 002b:00007f5b08c66908 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [36330.177674] RAX: ffffffffffffffda RBX: 000000000000ae80 RCX: 00007f5b27557f07 [36330.177676] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000012 [36330.177678] RBP: 0000009fdb7405a0 R08: 0000009fd9118550 R09: 00000000000000ff [36330.177680] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 [36330.177682] R13: 00007f5b2c6e3000 R14: 0000000000000000 R15: 0000009fdb7405a0 [36330.177685] Code: 74 59 0f b7 41 0a 4c 63 69 04 0f b7 71 08 89 c7 49 01 cd 83 e7 01 a8 02 74 15 66 85 ff 74 10 a8 04 ba 01 00 00 00 75 26 83 c8 04 <66> 89 41 0a 66 85 ff 74 49 0f b6 49 0b 4c 89 e2 45 31 c9 49 89 [36330.177735] RIP: report_bug+0x94/0x120 RSP: ffffa46262f7f7a0 [36330.177737] CR2: ffffffffc0633f92 [36330.177740] ---[ end trace 5d67fb9cae2ae6de ]--- -- You are receiving this mail because: You are watching the assignee of the bug.
