[Bug 196161] Kernel freezes by starting a kvm vm.

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=196161

--- Comment #2 from Paul (paulkek@protonmail.com) ---
I was lucky a second time and was able to recover the follwing kernel log:

[  +9.397431] NVRM: GPU at PCI:0000:01:00:
GPU-6bc6eebc-c700-43b5-d252-2d51c49afbd9
[  +0.000004] NVRM: GPU Board Serial Number:
[  +0.000002] NVRM: Xid (PCI:0000:01:00): 16, Head 00000000 Count 0000b24a
[  +3.110024] NVRM: Xid (PCI:0000:01:00): 8, Channel 00000010
[Jun22 23:49] NMI watchdog: Watchdog detected hard LOCKUP on cpu 5
[  +0.000001] Modules linked in: vhost_net vhost tap fuse ctr ccm xt_CHECKSUM
iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4
nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c
crc32c_generic ipt_REJECT nf_reject_ipv4 xt_tcpudp tun bridge stp llc
ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic arc4
nls_iso8859_1 nls_cp437 vfat fat intel_rapl x86_pkg_temp_thermal iwlmvm
intel_powerclamp coretemp kvm_intel iTCO_wdt iTCO_vendor_support eeepc_wmi kvm
asus_wmi mac80211 sparse_keymap irqbypass crct10dif_pclmul crc32_pclmul
crc32c_intel ghash_clmulni_intel pcbc iwlwifi nouveau aesni_intel aes_x86_64
crypto_simd cryptd snd_hda_intel evdev glue_helper joydev input_leds mousedev
[  +0.000007]  snd_hda_codec intel_cstate e1000e mac_hid intel_rapl_perf
cfg80211 snd_hwdep snd_hda_core psmouse ptp hci_uart snd_pcm pps_core led_class
btbcm pcspkr mxm_wmi snd_timer btqca i2c_i801 mei_me btintel ttm mei snd
i2c_algo_bit soundcore bluetooth battery video rfkill i2c_hid intel_lpss_acpi
intel_lpss shpchp wmi acpi_als tpm_tis kfifo_buf tpm_tis_core industrialio
acpi_pad tpm button sch_fq_codel sg ip_tables x_tables ext4 crc16 jbd2 fscrypto
mbcache hid_generic usbhid hid sd_mod serio_raw atkbd libps2 ahci xhci_pci
libahci xhci_hcd libata usbcore scsi_mod usb_common i8042 serio nvidia_drm(PO)
drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm nvidia_uvm(PO)
nvidia_modeset(PO) nvidia(PO)
[  +0.000009] CPU: 5 PID: 3041 Comm: CPU 1/KVM Tainted: P           O   
4.11.6-1-ck #1
[  +0.000000] Hardware name: System manufacturer System Product Name/Z170-A,
BIOS 3401 01/25/2017
[  +0.000000] task: ffff88065aa98cc0 task.stack: ffffc9000658c000
[  +0.000000] RIP: 0010:vmx_complete_atomic_exit+0x5d/0x90 [kvm_intel]
[  +0.000001] RSP: 0018:ffffc9000658fcc8 EFLAGS: 00000046
[  +0.000000] RAX: 0000000080000200 RBX: ffff880651a78000 RCX: ffff880651a78000
[  +0.000000] RDX: 0000000080000202 RSI: ffff9b01b85eeb80 RDI: ffff880651a78000
[  +0.000001] RBP: ffffc9000658fcd8 R08: ffff9b01b8727630 R09: ffff9b01b8727610
[  +0.000000] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002
[  +0.000000] R13: 0000000000000000 R14: fffff803fc289180 R15: fffff803fcc89000
[  +0.000000] FS:  00007f93037ff700(0000) GS:ffff88086ed40000(0000)
knlGS:000000af3a776000
[  +0.000001] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  +0.000000] CR2: 00007ffc841a5550 CR3: 00000007aa589000 CR4: 00000000003426e0
[  +0.000000] Call Trace:
[  +0.000000]  vmx_vcpu_run+0x31a/0x430 [kvm_intel]
[  +0.000000]  kvm_arch_vcpu_ioctl_run+0xb83/0x16a0 [kvm]
[  +0.000000]  kvm_vcpu_ioctl+0x2a6/0x640 [kvm]
[  +0.000001]  ? kvm_vcpu_ioctl+0x2a6/0x640 [kvm]
[  +0.000000]  ? __vfs_write+0x37/0x140
[  +0.000000]  do_vfs_ioctl+0xa5/0x600
[  +0.000000]  ? __fget+0x77/0xb0
[  +0.000000]  SyS_ioctl+0x79/0x90
[  +0.000000]  entry_SYSCALL_64_fastpath+0x1a/0xa9
[  +0.000001] RIP: 0033:0x7f931336bcb7

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