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[Launchpad Bug Tracker <1812845@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 4.4.0-146.172

---------------
linux (4.4.0-146.172) xenial; urgency=medium

  * linux: 4.4.0-146.172 -proposed tracker (LP: #1822834)

  * Packaging resync (LP: #1786013)
    - [Packaging] update helper scripts
    - [Packaging] resync retpoline extraction

  * 3b080b2564287be91605bfd1d5ee985696e61d3c in ubuntu_btrfs_kernel_fixes
    triggers system hang on i386 (LP: #1812845)
    - btrfs: raid56: properly unmap parity page in finish_parity_scrub()

  * Xenial update: 4.4.177 upstream stable release (LP: #1822271)
    - ceph: avoid repeatedly adding inode to mdsc->snap_flush_list
    - numa: change get_mempolicy() to use nr_node_ids instead of MAX_NUMNODES
    - KEYS: allow reaching the keys quotas exactly
    - mfd: ti_am335x_tscadc: Use PLATFORM_DEVID_AUTO while registering mfd cells
    - mfd: twl-core: Fix section annotations on {,un}protect_pm_master
    - mfd: db8500-prcmu: Fix some section annotations
    - mfd: ab8500-core: Return zero in get_register_interruptible()
    - mfd: qcom_rpm: write fw_version to CTRL_REG
    - mfd: wm5110: Add missing ASRC rate register
    - mfd: mc13xxx: Fix a missing check of a register-read failure
    - net: hns: Fix use after free identified by SLUB debug
    - MIPS: ath79: Enable OF serial ports in the default config
    - scsi: qla4xxx: check return code of qla4xxx_copy_from_fwddb_param
    - scsi: isci: initialize shost fully before calling scsi_add_host()
    - MIPS: jazz: fix 64bit build
    - isdn: i4l: isdn_tty: Fix some concurrency double-free bugs
    - atm: he: fix sign-extension overflow on large shift
    - leds: lp5523: fix a missing check of return value of lp55xx_read
    - isdn: avm: Fix string plus integer warning from Clang
    - RDMA/srp: Rework SCSI device reset handling
    - KEYS: user: Align the payload buffer
    - KEYS: always initialize keyring_index_key::desc_len
    - batman-adv: fix uninit-value in batadv_interface_tx()
    - net/packet: fix 4gb buffer limit due to overflow check
    - team: avoid complex list operations in team_nl_cmd_options_set()
    - sit: check if IPv6 enabled before calling ip6_err_gen_icmpv6_unreach()
    - net/mlx4_en: Force CHECKSUM_NONE for short ethernet frames
    - ARCv2: Enable unaligned access in early ASM code
    - Revert "bridge: do not add port to router list when receives query with
      source 0.0.0.0"
    - libceph: handle an empty authorize reply
    - drm/msm: Unblock writer if reader closes file
    - ASoC: Intel: Haswell/Broadwell: fix setting for .dynamic field
    - ALSA: compress: prevent potential divide by zero bugs
    - thermal: int340x_thermal: Fix a NULL vs IS_ERR() check
    - usb: dwc3: gadget: Fix the uninitialized link_state when udc starts
    - usb: gadget: Potential NULL dereference on allocation error
    - ASoC: dapm: change snprintf to scnprintf for possible overflow
    - ASoC: imx-audmux: change snprintf to scnprintf for possible overflow
    - ARC: fix __ffs return value to avoid build warnings
    - mac80211: fix miscounting of ttl-dropped frames
    - serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling
    - scsi: csiostor: fix NULL pointer dereference in csio_vport_set_state()
    - net: altera_tse: fix connect_local_phy error path
    - ibmveth: Do not process frames after calling napi_reschedule
    - mac80211: don't initiate TDLS connection if station is not associated to AP
    - cfg80211: extend range deviation for DMG
    - KVM: nSVM: clear events pending from svm_complete_interrupts() when exiting
      to L1
    - arm/arm64: KVM: Feed initialized memory to MMIO accesses
    - KVM: arm/arm64: Fix MMIO emulation data handling
    - powerpc: Always initialize input array when calling epapr_hypercall()
    - mmc: spi: Fix card detection during probe
    - x86/uaccess: Don't leak the AC flag into __put_user() value evaluation
    - USB: serial: option: add Telit ME910 ECM composition
    - USB: serial: cp210x: add ID for Ingenico 3070
    - USB: serial: ftdi_sio: add ID for Hjelmslund Electronics USB485
    - cpufreq: Use struct kobj_attribute instead of struct global_attr
    - sockfs: getxattr: Fail with -EOPNOTSUPP for invalid attribute names
    - ncpfs: fix build warning of strncpy
    - isdn: isdn_tty: fix build warning of strncpy
    - staging: lustre: fix buffer overflow of string buffer
    - net-sysfs: Fix mem leak in netdev_register_kobject
    - team: Free BPF filter when unregistering netdev
    - bnxt_en: Drop oversize TX packets to prevent errors.
    - net: nfc: Fix NULL dereference on nfc_llcp_build_tlv fails
    - xen-netback: fix occasional leak of grant ref mappings under memory pressure
    - net: Add __icmp_send helper.
    - net: avoid use IPCB in cipso_v4_error
    - net: phy: Micrel KSZ8061: link failure after cable connect
    - x86/CPU/AMD: Set the CPB bit unconditionally on F17h
    - applicom: Fix potential Spectre v1 vulnerabilities
    - MIPS: irq: Allocate accurate order pages for irq stack
    - hugetlbfs: fix races and page leaks during migration
    - netlabel: fix out-of-bounds memory accesses
    - net: dsa: mv88e6xxx: Fix u64 statistics
    - ip6mr: Do not call __IP6_INC_STATS() from preemptible context
    - media: uvcvideo: Fix 'type' check leading to overflow
    - vti4: Fix a ipip packet processing bug in 'IPCOMP' virtual tunnel
    - perf tools: Handle TOPOLOGY headers with no CPU
    - IB/{hfi1, qib}: Fix WC.byte_len calculation for UD_SEND_WITH_IMM
    - ipvs: Fix signed integer overflow when setsockopt timeout
    - iommu/amd: Fix IOMMU page flush when detach device from a domain
    - xtensa: SMP: fix ccount_timer_shutdown
    - xtensa: SMP: fix secondary CPU initialization
    - xtensa: smp_lx200_defconfig: fix vectors clash
    - xtensa: SMP: mark each possible CPU as present
    - xtensa: SMP: limit number of possible CPUs by NR_CPUS
    - net: altera_tse: fix msgdma_tx_completion on non-zero fill_level case
    - net: hns: Fix wrong read accesses via Clause 45 MDIO protocol
    - net: stmmac: dwmac-rk: fix error handling in rk_gmac_powerup()
    - gpio: vf610: Mask all GPIO interrupts
    - nfs: Fix NULL pointer dereference of dev_name
    - scsi: libfc: free skb when receiving invalid flogi resp
    - platform/x86: Fix unmet dependency warning for SAMSUNG_Q10
    - cifs: fix computation for MAX_SMB2_HDR_SIZE
    - x86/kexec: Don't setup EFI info if EFI runtime is not enabled
    - x86_64: increase stack size for KASAN_EXTRA
    - mm, memory_hotplug: is_mem_section_removable do not pass the end of a zone
    - mm, memory_hotplug: test_pages_in_a_zone do not pass the end of zone
    - fs/drop_caches.c: avoid softlockups in drop_pagecache_sb()
    - autofs: drop dentry reference only when it is never used
    - autofs: fix error return in autofs_fill_super()
    - ARM: pxa: ssp: unneeded to free devm_ allocated data
    - irqchip/mmp: Only touch the PJ4 IRQ & FIQ bits on enable/disable
    - dmaengine: at_xdmac: Fix wrongfull report of a channel as in use
    - dmaengine: dmatest: Abort test in case of mapping error
    - s390/qeth: fix use-after-free in error path
    - perf symbols: Filter out hidden symbols from labels
    - MIPS: Remove function size check in get_frame_info()
    - Input: wacom_serial4 - add support for Wacom ArtPad II tablet
    - Input: elan_i2c - add id for touchpad found in Lenovo s21e-20
    - iscsi_ibft: Fix missing break in switch statement
    - futex,rt_mutex: Restructure rt_mutex_finish_proxy_lock()
    - ARM: dts: exynos: Add minimal clkout parameters to Exynos3250 PMU
    - Revert "x86/platform/UV: Use efi_runtime_lock to serialise BIOS calls"
    - ARM: dts: exynos: Do not ignore real-world fuse values for thermal zone 0 on
      Exynos5420
    - udplite: call proper backlog handlers
    - netfilter: x_tables: enforce nul-terminated table name from getsockopt
      GET_ENTRIES
    - netfilter: nfnetlink_log: just returns error for unknown command
    - netfilter: nfnetlink_acct: validate NFACCT_FILTER parameters
    - netfilter: nf_conntrack_tcp: Fix stack out of bounds when parsing TCP
      options
    - KEYS: restrict /proc/keys by credentials at open time
    - l2tp: fix infoleak in l2tp_ip6_recvmsg()
    - net: hsr: fix memory leak in hsr_dev_finalize()
    - net: sit: fix UBSAN Undefined behaviour in check_6rd
    - net/x25: fix use-after-free in x25_device_event()
    - net/x25: reset state in x25_connect()
    - pptp: dst_release sk_dst_cache in pptp_sock_destruct
    - ravb: Decrease TxFIFO depth of Q3 and Q2 to one
    - route: set the deleted fnhe fnhe_daddr to 0 in ip_del_fnhe to fix a race
    - tcp: handle inet_csk_reqsk_queue_add() failures
    - net/mlx4_core: Fix reset flow when in command polling mode
    - net/mlx4_core: Fix qp mtt size calculation
    - net/x25: fix a race in x25_bind()
    - mdio_bus: Fix use-after-free on device_register fails
    - net: Set rtm_table to RT_TABLE_COMPAT for ipv6 for tables > 255
    - missing barriers in some of unix_sock ->addr and ->path accesses
    - ipvlan: disallow userns cap_net_admin to change global mode/flags
    - vxlan: test dev->flags & IFF_UP before calling gro_cells_receive()
    - vxlan: Fix GRO cells race condition between receive and link delete
    - net/hsr: fix possible crash in add_timer()
    - gro_cells: make sure device is up in gro_cells_receive()
    - tcp/dccp: remove reqsk_put() from inet_child_forget()
    - ALSA: bebob: use more identical mod_alias for Saffire Pro 10 I/O against
      Liquid Saffire 56
    - fs/9p: use fscache mutex rather than spinlock
    - It's wrong to add len to sector_nr in raid10 reshape twice
    - media: videobuf2-v4l2: drop WARN_ON in vb2_warn_zero_bytesused()
    - 9p: use inode->i_lock to protect i_size_write() under 32-bit
    - 9p/net: fix memory leak in p9_client_create
    - ASoC: fsl_esai: fix register setting issue in RIGHT_J mode
    - stm class: Fix an endless loop in channel allocation
    - crypto: caam - fixed handling of sg list
    - crypto: ahash - fix another early termination in hash walk
    - gpu: ipu-v3: Fix i.MX51 CSI control registers offset
    - gpu: ipu-v3: Fix CSI offsets for imx53
    - s390/dasd: fix using offset into zero size array error
    - ARM: OMAP2+: Variable "reg" in function omap4_dsi_mux_pads() could be
      uninitialized
    - Input: matrix_keypad - use flush_delayed_work()
    - i2c: cadence: Fix the hold bit setting
    - Input: st-keyscan - fix potential zalloc NULL dereference
    - ARM: 8824/1: fix a migrating irq bug when hotplug cpu
    - assoc_array: Fix shortcut creation
    - net: systemport: Fix reception of BPDUs
    - pinctrl: meson: meson8b: fix the sdxc_a data 1..3 pins
    - net: mv643xx_eth: disable clk on error path in mv643xx_eth_shared_probe()
    - ASoC: topology: free created components in tplg load error
    - arm64: Relax GIC version check during early boot
    - tmpfs: fix link accounting when a tmpfile is linked in
    - ARC: uacces: remove lp_start, lp_end from clobber list
    - phonet: fix building with clang
    - mac80211_hwsim: propagate genlmsg_reply return code
    - net: set static variable an initial value in atl2_probe()
    - tmpfs: fix uninitialized return value in shmem_link
    - stm class: Prevent division by zero
    - crypto: arm64/aes-ccm - fix logical bug in AAD MAC handling
    - CIFS: Fix read after write for files with read caching
    - tracing: Do not free iter->trace in fail path of tracing_open_pipe()
    - ACPI / device_sysfs: Avoid OF modalias creation for removed device
    - regulator: s2mps11: Fix steps for buck7, buck8 and LDO35
    - regulator: s2mpa01: Fix step values for some LDOs
    - clocksource/drivers/exynos_mct: Move one-shot check from tick clear to ISR
    - clocksource/drivers/exynos_mct: Clear timer interrupt when shutdown
    - s390/virtio: handle find on invalid queue gracefully
    - scsi: virtio_scsi: don't send sc payload with tmfs
    - scsi: target/iscsi: Avoid iscsit_release_commands_from_conn() deadlock
    - m68k: Add -ffreestanding to CFLAGS
    - btrfs: ensure that a DUP or RAID1 block group has exactly two stripes
    - Btrfs: fix corruption reading shared and compressed extents after hole
      punching
    - crypto: pcbc - remove bogus memcpy()s with src == dest
    - cpufreq: tegra124: add missing of_node_put()
    - cpufreq: pxa2xx: remove incorrect __init annotation
    - ext4: fix crash during online resizing
    - ext2: Fix underflow in ext2_max_size()
    - clk: ingenic: Fix round_rate misbehaving with non-integer dividers
    - dmaengine: usb-dmac: Make DMAC system sleep callbacks explicit
    - mm/vmalloc: fix size check for remap_vmalloc_range_partial()
    - kernel/sysctl.c: add missing range check in do_proc_dointvec_minmax_conv
    - intel_th: Don't reference unassigned outputs
    - parport_pc: fix find_superio io compare code, should use equal test.
    - i2c: tegra: fix maximum transfer size
    - perf bench: Copy kernel files needed to build mem{cpy,set} x86_64 benchmarks
    - serial: 8250_pci: Fix number of ports for ACCES serial cards
    - serial: 8250_pci: Have ACCES cards that use the four port Pericom PI7C9X7954
      chip use the pci_pericom_setup()
    - jbd2: clear dirty flag when revoking a buffer from an older transaction
    - jbd2: fix compile warning when using JBUFFER_TRACE
    - powerpc/32: Clear on-stack exception marker upon exception return
    - powerpc/wii: properly disable use of BATs when requested.
    - powerpc/powernv: Make opal log only readable by root
    - powerpc/83xx: Also save/restore SPRG4-7 during suspend
    - ARM: s3c24xx: Fix boolean expressions in osiris_dvs_notify
    - dm: fix to_sector() for 32bit
    - NFS41: pop some layoutget errors to application
    - perf intel-pt: Fix CYC timestamp calculation after OVF
    - perf auxtrace: Define auxtrace record alignment
    - perf intel-pt: Fix overlap calculation for padding
    - md: Fix failed allocation of md_register_thread
    - NFS: Fix an I/O request leakage in nfs_do_recoalesce
    - NFS: Don't recoalesce on error in nfs_pageio_complete_mirror()
    - nfsd: fix memory corruption caused by readdir
    - nfsd: fix wrong check in write_v4_end_grace()
    - PM / wakeup: Rework wakeup source timer cancellation
    - rcu: Do RCU GP kthread self-wakeup from softirq and interrupt
    - media: uvcvideo: Avoid NULL pointer dereference at the end of streaming
    - drm/radeon/evergreen_cs: fix missing break in switch statement
    - KVM: nVMX: Sign extend displacements of VMX instr's mem operands
    - KVM: nVMX: Ignore limit checks on VMX instructions using flat segments
    - KVM: X86: Fix residual mmio emulation request to userspace
    - Linux 4.4.177

  * sky2 ethernet card doesn't work after returning from suspend
    (LP: #1807259) // sky2 ethernet card link not up after suspend
    (LP: #1809843) // Xenial update: 4.4.177 upstream stable release
    (LP: #1822271)
    - sky2: Disable MSI on Dell Inspiron 1545 and Gateway P-79

  * [CONFIG] please enable highdpi font FONT_TER16x32 (LP: #1819881)
    - lib/fonts/Kconfig: keep non-Sparc fonts listed together
    - Fonts: New Terminus large console font
    - [Config]: enable highdpi Terminus 16x32 font support

  * Hard lockup in 2 CPUs due to deadlock in cpu_stoppers (LP: #1821259)
    - stop_machine, sched: Fix migrate_swap() vs. active_balance() deadlock
    - stop_machine: Disable preemption when waking two stopper threads
    - stop_machine: Disable preemption after queueing stopper threads
    - stop_machine: Atomically queue and wake stopper threads

 -- Khalid Elmously <khalid.elmously@xxxxxxxxxxxxx>  Tue, 02 Apr 2019
23:03:42 -0400

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

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https://bugs.launchpad.net/bugs/1812845

Title:
  3b080b2564287be91605bfd1d5ee985696e61d3c in ubuntu_btrfs_kernel_fixes
  triggers system hang on i386

Status in ubuntu-kernel-tests:
  In Progress
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Bionic:
  Fix Committed
Status in linux source package in Cosmic:
  Fix Committed
Status in linux source package in Disco:
  Fix Released

Bug description:
  SRU Justification:

  [Impact]

   * Parity page in btrfs raid56 is incorrectly unmapped, allowing to
  easily trigger a reference counter bug on i386 causing a kernel panic

   * The fix unmaps the right rbio pages and adds the proper kunmap()
  call for the parity page

  [Test Case]

   * create a raid5 btrfs filesystem:
     # mkfs.btrfs -m raid5 -d raid5 /dev/sdb /dev/sdc /dev/sdd /dev/sde

   * mount it:
     # mount /dev/sdb /mnt

   * run btrfs scrub in a loop:
     # while :; do btrfs scrub start -BR /mnt; done

  [Fix]

   *
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3897b6f0a859288c22fb793fad11ec2327e60fcd

  kunmap(p_page) was completely left out, so we never
  did an unmap for the p_page and the loop unmapping the rbio page was
  iterating over the wrong number of stripes: unmapping should be done
  with nr_data instead of rbio->real_stripes.

  [Regression Potential]

   * This is an upstream fix, tested on the affected platform. The bug
  is affecting only btrfs raid5/6 users on architectures where kunamp()
  is not a no-op (like i386). It is also a very small patch, so backport
  changes are minimal.

  [Original bug report]

  This issue was not spotted on AMD64

  Reproduce rate: 100%

  The following command is the key to trigger this:
      btrfs scrub start -BR $MNT

  Steps:
  # (Install necessary packages)
  # git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest-client-tests
  # TMP=/tmp/tmp MNT=/tmp/mnt
  # mkdir -p $TMP; mkdir -p $MNT
  # cd autotest-client-tests/ubuntu_btrfs_kernel_fixes
  # TMP=/tmp/tmp MNT=/tmp/mnt ./3b080b2564287be91605bfd1d5ee985696e61d3c.sh

  Trace:
   [  494.357824] ------------[ cut here ]------------
   [  494.357828] kernel BUG at /build/linux-bnzN1b/linux-4.15.0/mm/highmem.c:350!
   [  494.365079] invalid opcode: 0000 [#1] SMP
   [  494.369205] Modules linked in: cfg80211 intel_powerclamp ipmi_ssif gpio_ich coretemp kvm_intel kvm ipmi_si irqbypass input_leds joydev dcdbas intel_cstate ipmi_devintf sch_fq_codel shpchp i7core_edac lpc_ich ipmi_msghandler acpi_power_meter mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear mgag200 i2c_algo_bit ttm drm_kms_helper hid_generic syscopyarea sysfillrect usbhid sysimgblt mpt3sas fb_sys_fops drm hid raid_class bnx2 scsi_transport_sas pata_acpi wmi
   [  494.430188] CPU: 2 PID: 2093 Comm: kworker/u16:1 Not tainted 4.15.0-43-generic #46-Ubuntu
   [  494.438618] Hardware name: Dell Inc. PowerEdge R310/05XKKK, BIOS 1.11.0 09/18/2012
   [  494.446494] Workqueue: btrfs-endio-raid56 btrfs_endio_raid56_helper [btrfs]
   [  494.453657] EIP: kunmap_high+0xaa/0xb0
   [  494.457571] EFLAGS: 00010246 CPU: 2
   [  494.461229] EAX: 00000115 EBX: fffff000 ECX: 00000001 EDX: 00000000
   [  494.467840] ESI: 00000004 EDI: 00000004 EBP: f4883e44 ESP: f4883e40
   [  494.474264]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
   [  494.479931] CR0: 80050033 CR2: 005885e0 CR3: 0fe16000 CR4: 000006f0
   [  494.486353] Call Trace:
   [  494.488967]  kunmap+0x3e/0x50
   [  494.492140]  finish_parity_scrub+0x24d/0x570 [btrfs]
   [  494.497226]  ? update_load_avg+0x64f/0x830
   [  494.501528]  validate_rbio_for_parity_scrub+0xc2/0xd0 [btrfs]
   [  494.507527]  raid56_parity_scrub_end_io+0x53/0x70 [btrfs]
   [  494.513058]  bio_endio+0xb9/0x110
   [  494.516574]  ? end_workqueue_fn+0x2c/0x40 [btrfs]
   [  494.521435]  end_workqueue_fn+0x33/0x40 [btrfs]
   [  494.526139]  normal_work_helper+0x7d/0x2f0 [btrfs]
   [  494.531087]  btrfs_endio_raid56_helper+0x10/0x20 [btrfs]
   [  494.536621]  process_one_work+0x1b9/0x3d0
   [  494.540799]  worker_thread+0x37/0x420
   [  494.544628]  kthread+0xf0/0x110
   [  494.547931]  ? process_one_work+0x3d0/0x3d0
   [  494.552282]  ? kthread_create_worker_on_cpu+0x20/0x20
   [  494.557488]  ? kthread_create_worker_on_cpu+0x20/0x20
   [  494.562701]  ret_from_fork+0x2e/0x38
   [  494.566441] Code: 2d ee ff 58 8b 5d fc c9 c3 90 8d b4 26 00 00 00 00 a1 80 d1 c4 cf 31 c9 3d 80 d1 c4 cf 0f 95 c1 eb bc 8d b4 26 00 00 00 00 0f 0b <0f> 0b 8d 74 26 00 66 66 66 66 90 55 89 e5 56 53 31 db e8 1f ef
   [  494.585751] EIP: kunmap_high+0xaa/0xb0 SS:ESP: 0068:f4883e40
   [  494.591688] ---[ end trace 5e6d708abb85eeba ]---

  Follow up with CPU soft lockup.

  Please find the attachment for the complete log.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-43-generic 4.15.0-43.46
  ProcVersionSignature: User Name 4.15.0-43.46-generic 4.15.18
  Uname: Linux 4.15.0-43-generic i686
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Jan 22 11:54 seq
   crw-rw---- 1 root audio 116, 33 Jan 22 11:54 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: i386
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Tue Jan 22 11:54:49 2019
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  MachineType: Dell Inc. PowerEdge R310
  PciMultimedia:

  ProcFB: 0 mgadrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic root=UUID=6aaa11f6-d386-4c0c-b4b8-38e6c408980a ro console=ttyS0,115200n8
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-43-generic N/A
   linux-backports-modules-4.15.0-43-generic  N/A
   linux-firmware                             1.173.3
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/18/2012
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.11.0
  dmi.board.name: 05XKKK
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A05
  dmi.chassis.type: 23
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr1.11.0:bd09/18/2012:svnDellInc.:pnPowerEdgeR310:pvr:rvnDellInc.:rn05XKKK:rvrA05:cvnDellInc.:ct23:cvr:
  dmi.product.name: PowerEdge R310
  dmi.sys.vendor: Dell Inc.

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