When you start qemu on a 17.10 machine, the whole machine goes down and crashes:
[ 90.689627] Unable to handle kernel paging request for data at address 0xf000000002d3bda0
[ 90.689705] Faulting instruction address: 0xc000000000361224
[ 90.689840] Oops: Kernel access of bad area, sig: 11 [#1]
[ 90.689911] SMP NR_CPUS=2048
[ 90.689912] NUMA
[ 90.690053] PowerNV
[ 90.690092] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc kvm_hv kvm_pr kvm ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter openvswitch nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_defrag_ipv6 nf_nat nf_conntrack_netlink nf_conntrack nfnetlink idt_89hpesx snd_hda_codec_hdmi xfs joydev input_leds mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore ofpart opal_prd cmdlinepart powernv_flash mtd at24 ipmi_powernv ipmi_devintf ipmi_msghandler powernv_rng uio_pdrv_genirq vmx_crypto ibmpowernv uio ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi sunrpc ip_tables x_tables
[ 90.690724] autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor hid_generic usbhid hid raid6_pq libcrc32c raid1 raid0 multipath linear uas usb_storage ast crct10dif_vpmsum i2c_algo_bit crc32c_vpmsum ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm tg3 ahci libahci
[ 90.690937] CPU: 48 PID: 3986 Comm: qemu-system-ppc Not tainted 4.13.0-12-generic #13-Ubuntu
[ 90.691001] task: c000000b122d8700 task.stack: c000000b431cc000
[ 90.691167] NIP: c000000000361224 LR: c000000000998960 CTR: c0000000009a19b0
[ 90.691223] REGS: c000000bff61b800 TRAP: 0300 Not tainted (4.13.0-12-generic)
[ 90.691277] MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE>
[ 90.691282] CR: 88002844 XER: 00000000
[ 90.691347] CFAR: c00000000099895c DAR: f000000002d3bda0 DSISR: 40000000 SOFTE: 0
[ 90.691347] GPR00: c000000000998960 c000000bff61ba80 c0000000015e3000 c000000b4ef61f20
[ 90.691347] GPR04: c000000b44c61680 0000000000000000 000000000000001f 000000000000001f
[ 90.691347] GPR08: 000000000000001f 0000000002d3bd80 c00000000178e8e8 c000000b5a0c26f0
[ 90.691347] GPR12: 0000000028002842 c00000000fadf800 c000000b52d07880 c000000b44c61680
[ 90.691347] GPR16: 0000000000000000 000000000000001f 000000000000001f c00000000553a560
[ 90.691347] GPR20: 0000000000000001 0000000000000002 080000000553a560 c000000b5c62a228
[ 90.691347] GPR24: c000000005531110 c000000b5c632238 0000000000000210 0000000000000000
[ 90.691347] GPR28: c000000000998960 c000000bff61bc20 c000000b4ef61f20 f000000002d3bd80
[ 90.692089] NIP [c000000000361224] kfree+0x54/0x270
[ 90.692133] LR [c000000000998960] xhci_urb_free_priv+0x20/0x40
[ 90.692325] Call Trace:
[ 90.692345] [c000000bff61ba80] [c000000bff61bad0] 0xc000000bff61bad0 (unreliable)
[ 90.692402] [c000000bff61bac0] [c000000000998960] xhci_urb_free_priv+0x20/0x40
[ 90.692459] [c000000bff61bae0] [c00000000099bfc8] xhci_giveback_urb_in_irq.isra.22+0x78/0x190
[ 90.692645] [c000000bff61bb40] [c00000000099c350] xhci_td_cleanup+0x130/0x200
[ 90.692702] [c000000bff61bbc0] [c0000000009a175c] handle_tx_event+0x74c/0x1380
[ 90.692759] [c000000bff61bcc0] [c0000000009a2894] xhci_irq+0x504/0xf20
[ 90.692808] [c000000bff61bde0] [c00000000017b110] __handle_irq_event_percpu+0x90/0x300
[ 90.692977] [c000000bff61bea0] [c00000000017b3b8] handle_irq_event_percpu+0x38/0x90
[ 90.693038] [c000000bff61bee0] [c00000000017b474] handle_irq_event+0x64/0xb0
[ 90.693094] [c000000bff61bf10] [c000000000180da0] handle_fasteoi_irq+0xc0/0x230
[ 90.693155] [c000000bff61bf40] [c00000000017972c] generic_handle_irq+0x4c/0x70
[ 90.693332] [c000000bff61bf60] [c00000000001767c] __do_irq+0x7c/0x1c0
[ 90.693383] [c000000bff61bf90] [c00000000002ab70] call_do_irq+0x14/0x24
[ 90.693431] [c000000b431cf9d0] [c00000000001785c] do_IRQ+0x9c/0x130
[ 90.693478] [c000000b431cfa20] [c000000000008ac4] hardware_interrupt_common+0x114/0x120
[ 90.693663] --- interrupt: 501 at __copy_tofrom_user_power7+0x1f4/0x7cc
[ 90.693663] LR = _copy_to_user+0x3c/0x60
[ 90.693736] [c000000b431cfd10] [c000000b431cfdc0] 0xc000000b431cfdc0 (unreliable)
[ 90.693797] [c000000b431cfd30] [c0000000003bfa90] poll_select_copy_remaining+0x180/0x1b0
[ 90.693853] [c000000b431cfda0] [c0000000003c1934] SyS_ppoll+0x104/0x1e0
[ 90.694018] [c000000b431cfe30] [c00000000000b184] system_call+0x58/0x6c
[ 90.694064] Instruction dump:
[ 90.694094] Unable to handle kernel paging request for data at address 0xf000000002ffd860
[ 90.694153] Faulting instruction address: 0xc000000000399624
[ 90.694198] Oops: Kernel access of bad area, sig: 11 [#2]
[ 90.694351] SMP NR_CPUS=2048
[ 90.694351] NUMA
[ 90.694381] PowerNV
I am using the latest kernel at the moment version 4.13-12
I just reproduced it with a different stack this time:
[ 2764.725547] Severe Machine check interrupt [Recovered]
[ 2764.725676] NIP [c000000000089268]: __copy_tofrom_user_power7+0x1f4/0x7cc
[ 2764.725743] Initiator: CPU
[ 2764.725764] Error type: SLB [Multihit]
[ 2764.725786] Effective address: 00007fffd16e82c8
[ 2796.015384] Severe Machine check interrupt [Recovered]
[ 2796.015509] NIP [c000000000089268]: __copy_tofrom_user_power7+0x1f4/0x7cc
[ 2796.015586] Initiator: CPU
[ 2796.015701] Error type: SLB [Parity]
[ 2796.015723] Effective address: 00007fffddabe278
[ 2796.073775] Unable to handle kernel paging request for data at address 0xf000000002378020
[ 2796.073949] Faulting instruction address: 0xc000000000309a18
[ 2796.074075] Oops: Kernel access of bad area, sig: 11 [#1]
[ 2796.074104] SMP NR_CPUS=2048
[ 2796.074104] NUMA
[ 2796.074126] PowerNV
[ 2796.074156] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc kvm_hv kvm_pr kvm ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter openvswitch nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_defrag_ipv6 nf_nat nf_conntrack_netlink nf_conntrack nfnetlink xfs idt_89hpesx snd_hda_codec_hdmi joydev input_leds mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore ipmi_powernv at24 uio_pdrv_genirq ofpart cmdlinepart powernv_flash ipmi_devintf powernv_rng mtd ipmi_msghandler opal_prd uio ibmpowernv vmx_crypto sunrpc ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables
[ 2796.074643] autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx hid_generic usbhid hid xor raid6_pq libcrc32c raid1 raid0 multipath linear uas usb_storage ast i2c_algo_bit crct10dif_vpmsum ttm crc32c_vpmsum drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm tg3 ahci libahci
[ 2796.074902] CPU: 40 PID: 21964 Comm: CPU 0/KVM Tainted: G M 4.13.0-15-generic #16-Ubuntu
[ 2796.074955] task: c000000a0b255900 task.stack: c000000a0bf9c000
[ 2796.074990] NIP: c000000000309a18 LR: c000000000309a14 CTR: c00000000030a280
[ 2796.075031] REGS: c000000a0bf9f560 TRAP: 0300 Tainted: G M (4.13.0-15-generic)
[ 2796.075080] MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE>
[ 2796.075083] CR: 48024244 XER: 20000000
[ 2796.075133] CFAR: c00000000006c508 DAR: f000000002378020 DSISR: 40000000 SOFTE: 0
[ 2796.075133] GPR00: c000000000309a14 c000000a0bf9f7e0 c0000000015f3400 f000000002378000
[ 2796.075133] GPR04: 00000000d9458000 0000000000000012 00000000834c0000 0000000000000008
[ 2796.075133] GPR08: f000000000000000 0000000000000001 0000000002378000 c00000000179e958
[ 2796.075133] GPR12: 0000000028004248 c00000000fada400 000072882e440000 000072882e440000
[ 2796.075133] GPR16: 0000000000010000 000074882e430000 c000000ad9458000 0000000000000001
[ 2796.075133] GPR20: 4000000000002000 c00000000179e968 000072882e43ffff 000072882e440000
[ 2796.075133] GPR24: c000000a0bf9f988 0008000000000040 07000000000000c0 0000000000000001
[ 2796.075133] GPR28: c0800008de002386 862300de080080c0 c0000009834c0170 0000000000000004
[ 2796.075513] NIP [c000000000309a18] __get_user_pages_fast+0x798/0xfd0
[ 2796.075549] LR [c000000000309a14] __get_user_pages_fast+0x794/0xfd0
[ 2796.075652] Call Trace:
[ 2796.075699] [c000000a0bf9f7e0] [d0000000070f89e4] kvmppc_run_core+0xeec/0x1370 [kvm_hv] (unreliable)
[ 2796.075749] [c000000a0bf9f900] [c00000000030a390] get_user_pages_fast+0x110/0x160
[ 2796.075793] [c000000a0bf9f950] [d0000000070fe21c] kvmppc_book3s_hv_page_fault+0x384/0xc60 [kvm_hv]
[ 2796.075844] [c000000a0bf9fa40] [d0000000070fa94c] kvmppc_vcpu_run_hv+0x314/0x790 [kvm_hv]
[ 2796.075891] [c000000a0bf9fb10] [d000000006f759ec] kvmppc_vcpu_run+0x34/0x48 [kvm]
[ 2796.075941] [c000000a0bf9fb30] [d000000006f71aa0] kvm_arch_vcpu_ioctl_run+0x108/0x320 [kvm]
[ 2796.076100] [c000000a0bf9fbd0] [d000000006f65018] kvm_vcpu_ioctl+0x400/0x7c8 [kvm]
[ 2796.076144] [c000000a0bf9fd40] [c0000000003bd6a4] do_vfs_ioctl+0xd4/0xa00
[ 2796.076181] [c000000a0bf9fde0] [c0000000003be094] SyS_ioctl+0xc4/0x130
[ 2796.076217] [c000000a0bf9fe30] [c00000000000b184] system_call+0x58/0x6c
[ 2796.076252] Instruction dump:
[ 2796.076275] Unable to handle kernel paging request for data at address 0xf00000000282fe60
[ 2796.076339] Faulting instruction address: 0xc0000000003995c4
[ 2796.076444] Oops: Kernel access of bad area, sig: 11 [#2]
[ 2796.076473] SMP NR_CPUS=2048
[ 2796.076473] NUMA
[ 2796.076494] PowerNV
[ 2796.076523] Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc kvm_hv kvm_pr kvm ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter openvswitch nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_defrag_ipv6 nf_nat nf_conntrack_netlink nf_conntrack nfnetlink xfs idt_89hpesx snd_hda_codec_hdmi joydev input_leds mac_hid snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore ipmi_powernv at24 uio_pdrv_genirq ofpart cmdlinepart powernv_flash ipmi_devintf powernv_rng mtd ipmi_msghandler opal_prd uio ibmpowernv vmx_crypto sunrpc ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables
[ 2796.078461] autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx hid_generic usbhid hid xor raid6_pq libcrc32c raid1 raid0 multipath linear uas usb_storage ast i2c_algo_bit crct10dif_vpmsum ttm crc32c_vpmsum drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm tg3 ahci libahci
[ 2796.080130] CPU: 40 PID: 21964 Comm: CPU 0/KVM Tainted: G M 4.13.0-15-generic #16-Ubuntu
[ 2796.080797] task: c000000a0b255900 task.stack: c000000a0bf9c000
[ 2796.081128] NIP: c0000000003995c4 LR: c0000000002bf778 CTR: 00000000300303f0
[ 2796.081474] REGS: c000000a0bf9efc0 TRAP: 0300 Tainted: G M (4.13.0-15-generic)
[ 2796.081819] MSR: 9000000000001033 <SF,HV,ME,IR,DR,RI,LE>
[ 2796.081822] CR: 48024228 XER: 20000000
[ 2796.082458] CFAR: c0000000002bf774 DAR: f00000000282fe60 DSISR: 40000000 SOFTE: 0
[ 2796.082458] GPR00: c0000000002bf778 c000000a0bf9f240 c0000000015f3400 c000000a0bf9f360
[ 2796.082458] GPR04: 0000000000000004 f00000000282fe40 9000000000001033 0000000000000060
[ 2796.082458] GPR08: 000000000000a0b0 000000000282fe40 c00000000179e8e8 9000000000001003
[ 2796.082458] GPR12: 0000000000004400 c00000000fada400 000072882e440000 000072882e440000
[ 2796.082458] GPR16: 0000000000010000 000074882e430000 c000000ad9458000 0000000000000001
[ 2796.082458] GPR20: 4000000000002000 c00000000179e968 000072882e43ffff 000072882e440000
[ 2796.082458] GPR24: c000000a0bf9f988 c000000000e98308 c000000000e98318 c000000a0bf9f560
[ 2796.082458] GPR28: c000000a0bf9f364 0000000000000000 0000000000000004 c000000a0bf9f360
[ 2796.088348] NIP [c0000000003995c4] __check_object_size+0xc4/0x250
[ 2796.088427] LR [c0000000002bf778] __probe_kernel_read+0x68/0xd0
[ 2796.088750] Call Trace:
[ 2796.089060] [c000000a0bf9f240] [c000000a0bf9f2c0] 0xc000000a0bf9f2c0 (unreliable)
[ 2796.089405] [c000000a0bf9f2c0] [c0000000002bf778] __probe_kernel_read+0x68/0xd0
[ 2796.090048] [c000000a0bf9f300] [c00000000001e010] show_regs+0x300/0x430
[ 2796.090394] [c000000a0bf9f3c0] [c00000000002647c] __die+0xec/0x130
[ 2796.090732] [c000000a0bf9f440] [c000000000026524] die+0x64/0xe0
[ 2796.091091] [c000000a0bf9f480] [c000000000069fb0] bad_page_fault+0xe0/0x14c
[ 2796.091404] [c000000a0bf9f4f0] [c00000000000a4b8] handle_page_fault+0x34/0x38
[ 2796.091745] --- interrupt: 300 at __get_user_pages_fast+0x798/0xfd0
[ 2796.091745] LR = __get_user_pages_fast+0x794/0xfd0
[ 2796.092403] [c000000a0bf9f7e0] [d0000000070f89e4] kvmppc_run_core+0xeec/0x1370 [kvm_hv] (unreliable)
[ 2796.093083] [c000000a0bf9f900] [c00000000030a390] get_user_pages_fast+0x110/0x160
[ 2796.093418] [c000000a0bf9f950] [d0000000070fe21c] kvmppc_book3s_hv_page_fault+0x384/0xc60 [kvm_hv]
[ 2796.094073] [c000000a0bf9fa40] [d0000000070fa94c] kvmppc_vcpu_run_hv+0x314/0x790 [kvm_hv]
[ 2796.094423] [c000000a0bf9fb10] [d000000006f759ec] kvmppc_vcpu_run+0x34/0x48 [kvm]
[ 2796.094777] [c000000a0bf9fb30] [d000000006f71aa0] kvm_arch_vcpu_ioctl_run+0x108/0x320 [kvm]
[ 2796.096433] [c000000a0bf9fbd0] [d000000006f65018] kvm_vcpu_ioctl+0x400/0x7c8 [kvm]
[ 2796.096785] [c000000a0bf9fd40] [c0000000003bd6a4] do_vfs_ioctl+0xd4/0xa00
[ 2796.097121] [c000000a0bf9fde0] [c0000000003be094] SyS_ioctl+0xc4/0x130
[ 2796.097467] [c000000a0bf9fe30] [c00000000000b184] system_call+0x58/0x6c
[ 2796.098127] Instruction dump:
...
It repeats the above.
Breno got some information the problem is mostly like to be related to SBL multi-hit.
Mirroring to Launchpad to advise Canonical of this KVM issue...
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