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[Bug 1793901] Re: kernel oops in bcache module

 

This bug was fixed in the package linux - 4.4.0-143.169

---------------
linux (4.4.0-143.169) xenial; urgency=medium

  * linux: 4.4.0-143.169 -proposed tracker (LP: #1814647)

  * x86/kvm: Backport fixup and missing commits (LP: #1811646)
    - KVM: x86: avoid vmalloc(0) in the KVM_SET_CPUID
    - kvm: nVMX: VMCLEAR an active shadow VMCS after last use
    - X86/nVMX: Properly set spec_ctrl and pred_cmd before merging MSRs
    - KVM/VMX: Optimize vmx_vcpu_run() and svm_vcpu_run() by marking the RDMSR
      path as unlikely()
    - kvm: x86: IA32_ARCH_CAPABILITIES is always supported
    - KVM: SVM: Add MSR-based feature support for serializing LFENCE
    - KVM: X86: Allow userspace to define the microcode version
    - KVM: x86: SVM: Call x86_spec_ctrl_set_guest/host() with interrupts disabled
    - KVM: VMX: fixes for vmentry_l1d_flush module parameter
    - kvm: svm: Ensure an IBPB on all affected CPUs when freeing a vmcb
    - kvm: vmx: Scrub hardware GPRs at VM-exit
    - SAUCE: [Fix] x86/KVM/VMX: Add L1D flush logic
    - SAUCE: KVM: Move code fragments, cleanup and re-indent

  * linux-buildinfo: pull out ABI information into its own package
    (LP: #1806380)
    - [Packaging] limit preparation to linux-libc-dev in headers
    - [Packaging] commonise debhelper invocation
    - [Packaging] ABI -- accumulate abi information at the end of the build
    - [Packaging] buildinfo -- add basic build information
    - [Packaging] buildinfo -- add firmware information to the flavour ABI
    - [Packaging] buildinfo -- add compiler information to the flavour ABI
    - [Packaging] buildinfo -- add buildinfo support to getabis
    - [Config] buildinfo -- add retpoline version markers
    - [Packaging] getabis -- handle all known package combinations
    - [Packaging] getabis -- support parsing a simple version

  * signing: only install a signed kernel (LP: #1764794)
    - [Packaging] update to Debian like control scripts
    - [Packaging] switch to triggers for postinst.d postrm.d handling
    - [Packaging] signing -- switch to raw-signing tarballs
    - [Packaging] signing -- switch to linux-image as signed when available
    - [Packaging] printenv -- add signing options
    - [Packaging] fix invocation of header postinst hooks
    - [Packaging] signing -- add support for signing Opal kernel binaries
    - [Debian] Use src_pkg_name when constructing udeb control files
    - [Debian] Dynamically determine linux udebs package name
    - [Packaging] handle both linux-lts* and linux-hwe* as backports
    - [Config] linux-source-* is in the primary linux namespace
    - [Packaging] lookup the upstream tag
    - [Packaging] zfs/spl -- enhance provides information
    - [Packaging] switch up to debhelper 9
    - [Packaging] autopkgtest -- disable d-i when dropping flavours
    - [debian] support for ship_extras_package=false
    - [Debian] do_common_tools should always be on
    - [debian] do not force do_tools_common
    - [Packaging] Add linux-tools-host package for VM host tools
    - [Packaging] signing should be conditional
    - [Packaging] skip cloud tools packaging when not building package
    - [Packaging] add acpidbg
    - [debian] prep linux-libc-dev only if do_libc_dev_package=true
    - [Packaging] Only install cloud init files when do_tools_common=true

  * Redpine: Driver crash with network-manager 1.10 and above (LP: #1813869)
    - SAUCE: Redpine: enhancement for MAC spoofing to avoid kernel crash

  * Guests using IBRS incur a large performance penalty (LP: #1764956)
    - SAUCE: Restore the IBRS host state on VMEXIT

  * Xenial update: 4.4.170 upstream stable release (LP: #1811647)
    - USB: hso: Fix OOB memory access in hso_probe/hso_get_config_data
    - xhci: Don't prevent USB2 bus suspend in state check intended for USB3 only
    - USB: serial: option: add GosunCn ZTE WeLink ME3630
    - USB: serial: option: add HP lt4132
    - USB: serial: option: add Simcom SIM7500/SIM7600 (MBIM mode)
    - USB: serial: option: add Fibocom NL668 series
    - USB: serial: option: add Telit LN940 series
    - mmc: core: Reset HPI enabled state during re-init and in case of errors
    - mmc: omap_hsmmc: fix DMA API warning
    - gpio: max7301: fix driver for use with CONFIG_VMAP_STACK
    - Drivers: hv: vmbus: Return -EINVAL for the sys files for unopened channels
    - x86/mtrr: Don't copy uninitialized gentry fields back to userspace
    - drm/ioctl: Fix Spectre v1 vulnerabilities
    - ip6mr: Fix potential Spectre v1 vulnerability
    - ipv4: Fix potential Spectre v1 vulnerability
    - ax25: fix a use-after-free in ax25_fillin_cb()
    - ibmveth: fix DMA unmap error in ibmveth_xmit_start error path
    - ieee802154: lowpan_header_create check must check daddr
    - ipv6: explicitly initialize udp6_addr in udp_sock_create6()
    - isdn: fix kernel-infoleak in capi_unlocked_ioctl
    - netrom: fix locking in nr_find_socket()
    - packet: validate address length
    - packet: validate address length if non-zero
    - sctp: initialize sin6_flowinfo for ipv6 addrs in sctp_inet6addr_event
    - vhost: make sure used idx is seen before log in vhost_add_used_n()
    - VSOCK: Send reset control packet when socket is partially bound
    - xen/netfront: tolerate frags with no data
    - gro_cell: add napi_disable in gro_cells_destroy
    - sock: Make sock->sk_stamp thread-safe
    - ALSA: rme9652: Fix potential Spectre v1 vulnerability
    - ALSA: emu10k1: Fix potential Spectre v1 vulnerabilities
    - ALSA: pcm: Fix potential Spectre v1 vulnerability
    - ALSA: emux: Fix potential Spectre v1 vulnerabilities
    - ALSA: hda: add mute LED support for HP EliteBook 840 G4
    - ALSA: hda/tegra: clear pending irq handlers
    - USB: serial: pl2303: add ids for Hewlett-Packard HP POS pole displays
    - USB: serial: option: add Fibocom NL678 series
    - usb: r8a66597: Fix a possible concurrency use-after-free bug in
      r8a66597_endpoint_disable()
    - Input: elan_i2c - add ACPI ID for touchpad in ASUS Aspire F5-573G
    - KVM: x86: Use jmp to invoke kvm_spurious_fault() from .fixup
    - perf pmu: Suppress potential format-truncation warning
    - ext4: fix possible use after free in ext4_quota_enable
    - ext4: missing unlock/put_page() in ext4_try_to_write_inline_data()
    - ext4: fix EXT4_IOC_GROUP_ADD ioctl
    - ext4: force inode writes when nfsd calls commit_metadata()
    - spi: bcm2835: Fix race on DMA termination
    - spi: bcm2835: Fix book-keeping of DMA termination
    - spi: bcm2835: Avoid finishing transfer prematurely in IRQ mode
    - cdc-acm: fix abnormal DATA RX issue for Mediatek Preloader.
    - media: vivid: free bitmap_cap when updating std/timings/etc.
    - MIPS: Ensure pmd_present() returns false after pmd_mknotpresent()
    - MIPS: Align kernel load address to 64KB
    - CIFS: Fix error mapping for SMB2_LOCK command which caused OFD lock problem
    - x86/kvm/vmx: do not use vm-exit instruction length for fast MMIO when
      running nested
    - spi: bcm2835: Unbreak the build of esoteric configs
    - powerpc: Fix COFF zImage booting on old powermacs
    - ARM: imx: update the cpu power up timing setting on i.mx6sx
    - Input: restore EV_ABS ABS_RESERVED
    - checkstack.pl: fix for aarch64
    - xfrm: Fix bucket count reported to userspace
    - scsi: bnx2fc: Fix NULL dereference in error handling
    - Input: omap-keypad - fix idle configuration to not block SoC idle states
    - scsi: zfcp: fix posting too many status read buffers leading to adapter
      shutdown
    - hwpoison, memory_hotplug: allow hwpoisoned pages to be offlined
    - mm, devm_memremap_pages: mark devm_memremap_pages() EXPORT_SYMBOL_GPL
    - mm, devm_memremap_pages: kill mapping "System RAM" support
    - sunrpc: fix cache_head leak due to queued request
    - sunrpc: use SVC_NET() in svcauth_gss_* functions
    - crypto: x86/chacha20 - avoid sleeping with preemption disabled
    - ALSA: cs46xx: Potential NULL dereference in probe
    - ALSA: usb-audio: Avoid access before bLength check in build_audio_procunit()
    - ALSA: usb-audio: Fix an out-of-bound read in create_composite_quirks
    - dlm: fixed memory leaks after failed ls_remove_names allocation
    - dlm: possible memory leak on error path in create_lkb()
    - dlm: lost put_lkb on error path in receive_convert() and receive_unlock()
    - dlm: memory leaks on error path in dlm_user_request()
    - gfs2: Fix loop in gfs2_rbm_find
    - b43: Fix error in cordic routine
    - 9p/net: put a lower bound on msize
    - iommu/vt-d: Handle domain agaw being less than iommu agaw
    - ceph: don't update importing cap's mseq when handing cap export
    - genwqe: Fix size check
    - intel_th: msu: Fix an off-by-one in attribute store
    - power: supply: olpc_battery: correct the temperature units
    - Linux 4.4.170

  * Xenial update: 4.4.169 upstream stable release (LP: #1811252)
    - lib/interval_tree_test.c: make test options module parameters
    - lib/interval_tree_test.c: allow full tree search
    - lib/rbtree_test.c: make input module parameters
    - lib/rbtree-test: lower default params
    - lib/interval_tree_test.c: allow users to limit scope of endpoint
    - timer/debug: Change /proc/timer_list from 0444 to 0400
    - powerpc/boot: Fix random libfdt related build errors
    - pinctrl: sunxi: a83t: Fix IRQ offset typo for PH11
    - aio: fix spectre gadget in lookup_ioctx
    - MMC: OMAP: fix broken MMC on OMAP15XX/OMAP5910/OMAP310
    - tracing: Fix memory leak in set_trigger_filter()
    - tracing: Fix memory leak of instance function hash filters
    - powerpc/msi: Fix NULL pointer access in teardown code
    - Revert "drm/rockchip: Allow driver to be shutdown on reboot/kexec"
    - f2fs: fix a panic caused by NULL flush_cmd_control
    - mac80211: don't WARN on bad WMM parameters from buggy APs
    - mac80211: Fix condition validating WMM IE
    - mac80211_hwsim: fix module init error paths for netlink
    - scsi: libiscsi: Fix NULL pointer dereference in iscsi_eh_session_reset
    - scsi: vmw_pscsi: Rearrange code to avoid multiple calls to free_irq during
      unload
    - x86/earlyprintk/efi: Fix infinite loop on some screen widths
    - drm/msm: Grab a vblank reference when waiting for commit_done
    - ARC: io.h: Implement reads{x}()/writes{x}()
    - bonding: fix 802.3ad state sent to partner when unbinding slave
    - SUNRPC: Fix a potential race in xprt_connect()
    - sbus: char: add of_node_put()
    - drivers/sbus/char: add of_node_put()
    - drivers/tty: add missing of_node_put()
    - ide: pmac: add of_node_put()
    - clk: mmp: Off by one in mmp_clk_add()
    - Input: omap-keypad - fix keyboard debounce configuration
    - libata: whitelist all SAMSUNG MZ7KM* solid-state disks
    - mv88e6060: disable hardware level MAC learning
    - ARM: 8814/1: mm: improve/fix ARM v7_dma_inv_range() unaligned address
      handling
    - cifs: In Kconfig CONFIG_CIFS_POSIX needs depends on legacy (insecure cifs)
    - [Config] Remove CONFIG_CIFS_POSIX=y
    - i2c: axxia: properly handle master timeout
    - i2c: scmi: Fix probe error on devices with an empty SMB0001 ACPI device node
    - rtc: snvs: add a missing write sync
    - rtc: snvs: Add timeouts to avoid kernel lockups
    - ALSA: isa/wavefront: prevent some out of bound writes
    - Linux 4.4.169

  * Xenial update: 4.4.168 upstream stable release (LP: #1811080)
    - ipv6: Check available headroom in ip6_xmit() even without options
    - net: 8139cp: fix a BUG triggered by changing mtu with network traffic
    - net: phy: don't allow __set_phy_supported to add unsupported modes
    - net: Prevent invalid access to skb->prev in __qdisc_drop_all
    - rtnetlink: ndo_dflt_fdb_dump() only work for ARPHRD_ETHER devices
    - tcp: fix NULL ref in tail loss probe
    - tun: forbid iface creation with rtnl ops
    - neighbour: Avoid writing before skb->head in neigh_hh_output()
    - ARM: OMAP2+: prm44xx: Fix section annotation on
      omap44xx_prm_enable_io_wakeup
    - ARM: OMAP1: ams-delta: Fix possible use of uninitialized field
    - sysv: return 'err' instead of 0 in __sysv_write_inode
    - s390/cpum_cf: Reject request for sampling in event initialization
    - hwmon: (ina2xx) Fix current value calculation
    - ASoC: dapm: Recalculate audio map forcely when card instantiated
    - hwmon: (w83795) temp4_type has writable permission
    - Btrfs: send, fix infinite loop due to directory rename dependencies
    - ASoC: omap-mcpdm: Add pm_qos handling to avoid under/overruns with CPU_IDLE
    - ASoC: omap-dmic: Add pm_qos handling to avoid overruns with CPU_IDLE
    - exportfs: do not read dentry after free
    - bpf: fix check of allowed specifiers in bpf_trace_printk
    - USB: omap_udc: use devm_request_irq()
    - USB: omap_udc: fix crashes on probe error and module removal
    - USB: omap_udc: fix omap_udc_start() on 15xx machines
    - USB: omap_udc: fix USB gadget functionality on Palm Tungsten E
    - KVM: x86: fix empty-body warnings
    - net: thunderx: fix NULL pointer dereference in nic_remove
    - ixgbe: recognize 1000BaseLX SFP modules as 1Gbps
    - net: hisilicon: remove unexpected free_netdev
    - drm/ast: fixed reading monitor EDID not stable issue
    - xen: xlate_mmu: add missing header to fix 'W=1' warning
    - fscache: fix race between enablement and dropping of object
    - fscache, cachefiles: remove redundant variable 'cache'
    - ocfs2: fix deadlock caused by ocfs2_defrag_extent()
    - hfs: do not free node before using
    - hfsplus: do not free node before using
    - debugobjects: avoid recursive calls with kmemleak
    - ocfs2: fix potential use after free
    - pstore: Convert console write to use ->write_buf
    - ALSA: pcm: remove SNDRV_PCM_IOCTL1_INFO internal command
    - KVM: nVMX: fix msr bitmaps to prevent L2 from accessing L0 x2APIC
    - KVM: nVMX: mark vmcs12 pages dirty on L2 exit
    - KVM: nVMX: Eliminate vmcs02 pool
    - KVM: VMX: introduce alloc_loaded_vmcs
    - KVM: VMX: make MSR bitmaps per-VCPU
    - KVM/x86: Add IBPB support
    - KVM/VMX: Allow direct access to MSR_IA32_SPEC_CTRL
    - KVM/SVM: Allow direct access to MSR_IA32_SPEC_CTRL
    - KVM/x86: Remove indirect MSR op calls from SPEC_CTRL
    - x86/uaccess: Use __uaccess_begin_nospec() and uaccess_try_nospec
    - KVM: SVM: Implement VIRT_SPEC_CTRL support for SSBD
    - bpf: support 8-byte metafield access
    - bpf/verifier: Add spi variable to check_stack_write()
    - bpf/verifier: Pass instruction index to check_mem_access() and check_xadd()
    - bpf: Prevent memory disambiguation attack
    - wil6210: missing length check in wmi_set_ie
    - mm/hugetlb.c: don't call region_abort if region_chg fails
    - hugetlbfs: fix offset overflow in hugetlbfs mmap
    - hugetlbfs: check for pgoff value overflow
    - hugetlbfs: fix bug in pgoff overflow checking
    - swiotlb: clean up reporting
    - sr: pass down correctly sized SCSI sense buffer
    - mm: remove write/force parameters from __get_user_pages_locked()
    - mm: remove write/force parameters from __get_user_pages_unlocked()
    - mm/nommu.c: Switch __get_user_pages_unlocked() to use __get_user_pages()
    - mm: replace get_user_pages_unlocked() write/force parameters with gup_flags
    - mm: replace get_user_pages_locked() write/force parameters with gup_flags
    - mm: replace get_vaddr_frames() write/force parameters with gup_flags
    - mm: replace get_user_pages() write/force parameters with gup_flags
    - mm: replace __access_remote_vm() write parameter with gup_flags
    - mm: replace access_remote_vm() write parameter with gup_flags
    - proc: don't use FOLL_FORCE for reading cmdline and environment
    - proc: do not access cmdline nor environ from file-backed areas
    - media: dvb-frontends: fix i2c access helpers for KASAN
    - matroxfb: fix size of memcpy
    - staging: speakup: Replace strncpy with memcpy
    - rocker: fix rocker_tlv_put_* functions for KASAN
    - selftests: Move networking/timestamping from Documentation
    - Linux 4.4.168

  * kernel oops in bcache module (LP: #1793901)
    - SAUCE: bcache: never writeback a discard operation

  * Userspace break as a result of missing patch backport (LP: #1813873)
    - tty: Don't hold ldisc lock in tty_reopen() if ldisc present

  * CVE-2019-6133
    - fork: record start_time late

  * Crash on "ip link add foo type ipip" (LP: #1811803)
    - SAUCE: fan: Fix NULL pointer dereference

 -- Juerg Haefliger <juergh@xxxxxxxxxxxxx>  Wed, 06 Feb 2019 10:39:59
+0000

** Changed in: linux (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1793901

Title:
  kernel oops in bcache module

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Bionic:
  Fix Released
Status in linux source package in Cosmic:
  Fix Released

Bug description:
  SRU Justification
  =================

  [Impact]

  Some users see panics like the following when performing fstrim on a
  bcached volume:

  [  529.803060] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
  [  530.183928] #PF error: [normal kernel read fault]
  [  530.412392] PGD 8000001f42163067 P4D 8000001f42163067 PUD 1f42168067 PMD 0
  [  530.750887] Oops: 0000 [#1] SMP PTI
  [  530.920869] CPU: 10 PID: 4167 Comm: fstrim Kdump: loaded Not tainted 5.0.0-rc1+ #3
  [  531.290204] Hardware name: HP ProLiant DL360 Gen9/ProLiant DL360 Gen9, BIOS P89 12/27/2015
  [  531.693137] RIP: 0010:blk_queue_split+0x148/0x620
  [  531.922205] Code: 60 38 89 55 a0 45 31 db 45 31 f6 45 31 c9 31 ff 89 4d 98 85 db 0f 84 7f 04 00 00 44 8b 6d 98 4c 89 ee 48 c1 e6 04 49 03 70 78 <8b> 46 08 44 8b 56 0c 48
  8b 16 44 29 e0 39 d8 48 89 55 a8 0f 47 c3
  [  532.838634] RSP: 0018:ffffb9b708df39b0 EFLAGS: 00010246
  [  533.093571] RAX: 00000000ffffffff RBX: 0000000000046000 RCX: 0000000000000000
  [  533.441865] RDX: 0000000000000200 RSI: 0000000000000000 RDI: 0000000000000000
  [  533.789922] RBP: ffffb9b708df3a48 R08: ffff940d3b3fdd20 R09: 0000000000000000
  [  534.137512] R10: ffffb9b708df3958 R11: 0000000000000000 R12: 0000000000000000
  [  534.485329] R13: 0000000000000000 R14: 0000000000000000 R15: ffff940d39212020
  [  534.833319] FS:  00007efec26e3840(0000) GS:ffff940d1f480000(0000) knlGS:0000000000000000
  [  535.224098] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [  535.504318] CR2: 0000000000000008 CR3: 0000001f4e256004 CR4: 00000000001606e0
  [  535.851759] Call Trace:
  [  535.970308]  ? mempool_alloc_slab+0x15/0x20
  [  536.174152]  ? bch_data_insert+0x42/0xd0 [bcache]
  [  536.403399]  blk_mq_make_request+0x97/0x4f0
  [  536.607036]  generic_make_request+0x1e2/0x410
  [  536.819164]  submit_bio+0x73/0x150
  [  536.980168]  ? submit_bio+0x73/0x150
  [  537.149731]  ? bio_associate_blkg_from_css+0x3b/0x60
  [  537.391595]  ? _cond_resched+0x1a/0x50
  [  537.573774]  submit_bio_wait+0x59/0x90
  [  537.756105]  blkdev_issue_discard+0x80/0xd0
  [  537.959590]  ext4_trim_fs+0x4a9/0x9e0
  [  538.137636]  ? ext4_trim_fs+0x4a9/0x9e0
  [  538.324087]  ext4_ioctl+0xea4/0x1530
  [  538.497712]  ? _copy_to_user+0x2a/0x40
  [  538.679632]  do_vfs_ioctl+0xa6/0x600
  [  538.853127]  ? __do_sys_newfstat+0x44/0x70
  [  539.051951]  ksys_ioctl+0x6d/0x80
  [  539.212785]  __x64_sys_ioctl+0x1a/0x20
  [  539.394918]  do_syscall_64+0x5a/0x110
  [  539.568674]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

  [Fix]

  Under certain conditions, the test for whether an operation should be
  written back to the underlying device was incorrect. Specifically, in
  should_writeback(), we were hitting a case where an optimisation for
  partial stripe conditions was returning true and so should_writeback()
  was returning true early. This caused the code to go down an incorrect
  path and create bios that contained NULL pointers.

  To fix this issue, make sure that should_writeback() on a discard op
  never returns true.

  
  [Test Case]

  We have observed it on some systems where both:
  1) LVM/devmapper is involved (bcache backing device is LVM volume) and
  2) writeback cache is involved (bcache cache_mode is writeback)

  Not every machine exhibits the bug. On one machine that does exhibit
  the bug, we can reliably reproduce it with:

   # echo writeback > /sys/block/bcache0/bcache/cache_mode
   # mount /dev/bcache0 /test
   # for i in {0..10}; do file="$(mktemp /test/zero.XXX)"; dd if=/dev/zero of="$file" bs=1M count=256; sync; rm $file; done; fstrim -v /test

  
  [Regression Potential]

  This could affect any device where bcache is used.

  In mitigation, however: the patch is simple, is limited to considering
  discard operations. The patch has been accepted upstream [1] and the
  maintainer will be including it in SuSE kernels [2]. A Gentoo user
  validated the upstream patch independently [3].

  
  [1] https://www.spinics.net/lists/linux-bcache/msg06997.html
  [2] https://www.spinics.net/lists/linux-bcache/msg06998.html
  [3] https://bugzilla.kernel.org/show_bug.cgi?id=196103#c3

  
  [Original Description]

  This was on an 18.04.1 install running the 4.15-34 generic kernel image, running from a normal ext4 root device.
  I had just a short while before created a new bcache device that was mounted but to which no data had been written yet. Then without any apparent particular reason, an apport error popped up to inform of a bcache kernel oops. Crash log was uploaded but no idea how to link it, so I attach it as well.
  Mostly I would like to know how concerned I should be as after a previous, successful test I wanted to move the whole install to bcache. Ideally, if this is a bug or similar, it would be nice if it could get fixed.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-34-generic 4.15.0-34.37
  ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18
  Uname: Linux 4.15.0-34-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.3
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Sep 22 18:20:22 2018
  HibernationDevice: RESUME=UUID=6bcbe7fa-85b7-4baf-9b69-0558a668bcdd
  InstallationDate: Installed on 2014-07-29 (1515 days ago)
  InstallationMedia: It
  IwConfig:
   zthnhe3w6d  no wireless extensions.

   eth1      no wireless extensions.

   lo        no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-34-generic root=UUID=ebbab625-f14e-44ba-84d5-025ed92a5b2a ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-34-generic N/A
   linux-backports-modules-4.15.0-34-generic  N/A
   linux-firmware                             1.173.1
  RfKill:
   0: hci0: Bluetooth
    Soft blocked: yes
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to bionic on 2018-09-07 (15 days ago)
  dmi.bios.date: 10/22/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 0604
  dmi.board.asset.tag: Default string
  dmi.board.name: H170I-PLUS D3
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0604:bd10/22/2015:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnH170I-PLUSD3:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
  dmi.product.family: Default string
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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