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[Launchpad Bug Tracker <1922997@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux-hwe - 4.15.0-142.146~16.04.1

---------------
linux-hwe (4.15.0-142.146~16.04.1) xenial; urgency=medium

  * P8 node entei unable to boot with 4.15.0-141.145~16.04.1 (LP: #1922997)
    - [Packaging] HWE: disable CONFIG_MODVERSIONS

  [ Ubuntu: 4.15.0-142.146 ]

  * overlayfs calls vfs_setxattr without cap_convert_nscap
    - vfs: move cap_convert_nscap() call into vfs_setxattr()
  * CVE-2021-29154
    - SAUCE: bpf, x86: Validate computation of branch displacements for x86-64

linux-hwe (4.15.0-141.145~16.04.1) xenial; urgency=medium

  * xenial/linux-hwe: 4.15.0-141.145~16.04.1 -proposed tracker (LP:
#1919535)

  * Bionic update: upstream stable patchset 2021-02-26 (LP: #1917093)
    - [Config] hwe: Updateconfigs for BDM_PCI

  [ Ubuntu: 4.15.0-141.145 ]

  * bionic/linux: 4.15.0-141.145 -proposed tracker (LP: #1919536)
  * binary assembly failures with CONFIG_MODVERSIONS present (LP: #1919315)
    - [Packaging] quiet (nomially) benign errors in BUILD script
  * selftests: bpf verifier fails after sanitize_ptr_alu fixes (LP: #1920995)
    - bpf: Simplify alu_limit masking for pointer arithmetic
    - bpf: Add sanity check for upper ptr_limit
    - bpf, selftests: Fix up some test_verifier cases for unprivileged
  * Packaging resync (LP: #1786013)
    - update dkms package versions
  * CVE-2018-13095
    - xfs: More robust inode extent count validation
  * i40e PF reset due to incorrect MDD event (LP: #1772675)
    - i40e: change behavior on PF in response to MDD event
  * Bionic update: upstream stable patchset 2021-03-09 (LP: #1918330)
    - ACPI: sysfs: Prefer "compatible" modalias
    - ARM: dts: imx6qdl-gw52xx: fix duplicate regulator naming
    - wext: fix NULL-ptr-dereference with cfg80211's lack of commit()
    - net: usb: qmi_wwan: added support for Thales Cinterion PLSx3 modem family
    - drivers: soc: atmel: Avoid calling at91_soc_init on non AT91 SoCs
    - drivers: soc: atmel: add null entry at the end of at91_soc_allowed_list[]
    - KVM: x86/pmu: Fix HW_REF_CPU_CYCLES event pseudo-encoding in
      intel_arch_events[]
    - KVM: x86: get smi pending status correctly
    - xen: Fix XenStore initialisation for XS_LOCAL
    - leds: trigger: fix potential deadlock with libata
    - mt7601u: fix kernel crash unplugging the device
    - mt7601u: fix rx buffer refcounting
    - xen-blkfront: allow discard-* nodes to be optional
    - ARM: imx: build suspend-imx6.S with arm instruction set
    - netfilter: nft_dynset: add timeout extension to template
    - xfrm: Fix oops in xfrm_replay_advance_bmp
    - RDMA/cxgb4: Fix the reported max_recv_sge value
    - iwlwifi: pcie: use jiffies for memory read spin time limit
    - iwlwifi: pcie: reschedule in long-running memory reads
    - mac80211: pause TX while changing interface type
    - can: dev: prevent potential information leak in can_fill_info()
    - x86/entry/64/compat: Preserve r8-r11 in int $0x80
    - x86/entry/64/compat: Fix "x86/entry/64/compat: Preserve r8-r11 in int $0x80"
    - iommu/vt-d: Gracefully handle DMAR units with no supported address widths
    - iommu/vt-d: Don't dereference iommu_device if IOMMU_API is not built
    - NFC: fix resource leak when target index is invalid
    - NFC: fix possible resource leak
    - team: protect features update by RCU to avoid deadlock
    - tcp: fix TLP timer not set when CA_STATE changes from DISORDER to OPEN
    - kernel: kexec: remove the lock operation of system_transition_mutex
    - PM: hibernate: flush swap writer after marking
    - pNFS/NFSv4: Fix a layout segment leak in pnfs_layout_process()
    - net/mlx5: Fix memory leak on flow table creation error flow
    - rxrpc: Fix memory leak in rxrpc_lookup_local
    - net: dsa: bcm_sf2: put device node before return
    - ibmvnic: Ensure that CRQ entry read are correctly ordered
    - ACPI: thermal: Do not call acpi_thermal_check() directly
    - net_sched: gen_estimator: support large ewma log
    - phy: cpcap-usb: Fix warning for missing regulator_disable
    - x86: __always_inline __{rd,wr}msr()
    - scsi: scsi_transport_srp: Don't block target in failfast state
    - scsi: libfc: Avoid invoking response handler twice if ep is already
      completed
    - mac80211: fix fast-rx encryption check
    - scsi: ibmvfc: Set default timeout to avoid crash during migration
    - objtool: Don't fail on missing symbol table
    - kthread: Extract KTHREAD_IS_PER_CPU
    - workqueue: Restrict affinity change to rescuer
    - USB: serial: cp210x: add pid/vid for WSDA-200-USB
    - USB: serial: cp210x: add new VID/PID for supporting Teraoka AD2000
    - USB: serial: option: Adding support for Cinterion MV31
    - arm64: dts: ls1046a: fix dcfg address range
    - net: lapb: Copy the skb before sending a packet
    - elfcore: fix building with clang
    - USB: gadget: legacy: fix an error code in eth_bind()
    - USB: usblp: don't call usb_set_interface if there's a single alt
    - usb: dwc2: Fix endpoint direction check in ep_from_windex
    - ovl: fix dentry leak in ovl_get_redirect
    - mac80211: fix station rate table updates on assoc
    - kretprobe: Avoid re-registration of the same kretprobe earlier
    - xhci: fix bounce buffer usage for non-sg list case
    - cifs: report error instead of invalid when revalidating a dentry fails
    - smb3: Fix out-of-bounds bug in SMB2_negotiate()
    - mmc: core: Limit retries when analyse of SDIO tuples fails
    - nvme-pci: avoid the deepest sleep state on Kingston A2000 SSDs
    - ARM: footbridge: fix dc21285 PCI configuration accessors
    - mm: hugetlbfs: fix cannot migrate the fallocated HugeTLB page
    - mm: hugetlb: fix a race between isolating and freeing page
    - mm: hugetlb: remove VM_BUG_ON_PAGE from page_huge_active
    - mm: thp: fix MADV_REMOVE deadlock on shmem THP
    - x86/build: Disable CET instrumentation in the kernel
    - x86/apic: Add extra serialization for non-serializing MSRs
    - Input: xpad - sync supported devices with fork on GitHub
    - iommu/vt-d: Do not use flush-queue when caching-mode is on
    - net: dsa: mv88e6xxx: override existent unicast portvec in port_fdb_add
    - net: mvpp2: TCAM entry enable should be written after SRAM data
    - memblock: do not start bottom-up allocations with kernel_end
    - usb: renesas_usbhs: Clear pipe running flag in usbhs_pkt_pop()
    - genirq/msi: Activate Multi-MSI early when MSI_FLAG_ACTIVATE_EARLY is set
    - KVM: SVM: Treat SVM as unsupported when running as an SEV guest
    - md: Set prev_flush_start and flush_bio in an atomic way
    - net: ip_tunnel: fix mtu calculation
    - block: fix NULL pointer dereference in register_disk
    - remoteproc: qcom_q6v5_mss: Validate modem blob firmware size before load
    - remoteproc: qcom_q6v5_mss: Validate MBA firmware size before load
    - af_key: relax availability checks for skb size calculation
    - pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()
    - iwlwifi: mvm: take mutex for calling iwl_mvm_get_sync_time()
    - iwlwifi: pcie: add a NULL check in iwl_pcie_txq_unmap
    - iwlwifi: mvm: guard against device removal in reprobe
    - SUNRPC: Move simple_get_bytes and simple_get_netobj into private header
    - SUNRPC: Handle 0 length opaque XDR object data properly
    - lib/string: Add strscpy_pad() function
    - include/trace/events/writeback.h: fix -Wstringop-truncation warnings
    - memcg: fix a crash in wb_workfn when a device disappears
    - blk-mq: don't hold q->sysfs_lock in blk_mq_map_swqueue
    - squashfs: add more sanity checks in id lookup
    - squashfs: add more sanity checks in inode lookup
    - squashfs: add more sanity checks in xattr id lookup
  * SRU: Add FUA support for XFS (LP: #1917918)
    - block: add blk_queue_fua() helper function
    - xfs: move generic_write_sync calls inwards
    - iomap: iomap_dio_rw() handles all sync writes
    - iomap: Use FUA for pure data O_DSYNC DIO writes
  * CVE-2021-3348
    - nbd: freeze the queue while we're adding connections
  * Bionic kernel 4.15.0-136 causes dosemu2 (with kvm mode) freezes due to lack
    of KVM patch (LP: #1917138)
    - KVM: x86: handle !lapic_in_kernel case in kvm_cpu_*_extint
  * switch LRM to be signed using the Ubuntu Drivers signing key (LP: #1917034)
    - [Packaging] sync dkms-build to updated API
  * Bionic update: upstream stable patchset 2021-02-26 (LP: #1917093)
    - i2c: bpmp-tegra: Ignore unknown I2C_M flags
    - ALSA: seq: oss: Fix missing error check in snd_seq_oss_synth_make_info()
    - ALSA: hda/via: Add minimum mute flag
    - ACPI: scan: Make acpi_bus_get_device() clear return pointer on error
    - mmc: sdhci-xenon: fix 1.8v regulator stabilization
    - dm: avoid filesystem lookup in dm_get_dev_t()
    - drm/atomic: put state on error path
    - ASoC: Intel: haswell: Add missing pm_ops
    - scsi: ufs: Correct the LUN used in eh_device_reset_handler() callback
    - xen: Fix event channel callback via INTX/GSI
    - drm/nouveau/bios: fix issue shadowing expansion ROMs
    - drm/nouveau/privring: ack interrupts the same way as RM
    - drm/nouveau/i2c/gm200: increase width of aux semaphore owner fields
    - i2c: octeon: check correct size of maximum RECV_LEN packet
    - can: dev: can_restart: fix use after free bug
    - can: vxcan: vxcan_xmit: fix use after free bug
    - iio: ad5504: Fix setting power-down state
    - irqchip/mips-cpu: Set IPI domain parent chip
    - intel_th: pci: Add Alder Lake-P support
    - stm class: Fix module init return on allocation failure
    - ehci: fix EHCI host controller initialization sequence
    - USB: ehci: fix an interrupt calltrace error
    - usb: udc: core: Use lock when write to soft_connect
    - usb: bdc: Make bdc pci driver depend on BROKEN
    - [Config] updateconfigs for USB_BDC_PCI
    - xhci: make sure TRB is fully written before giving it to the controller
    - xhci: tegra: Delay for disabling LFPS detector
    - compiler.h: Raise minimum version of GCC to 5.1 for arm64
    - netfilter: rpfilter: mask ecn bits before fib lookup
    - sh: dma: fix kconfig dependency for G2_DMA
    - sh_eth: Fix power down vs. is_opened flag ordering
    - skbuff: back tiny skbs with kmalloc() in __netdev_alloc_skb() too
    - udp: mask TOS bits in udp_v4_early_demux()
    - ipv6: create multicast route with RTPROT_KERNEL
    - net_sched: avoid shift-out-of-bounds in tcindex_set_parms()
    - net: dsa: b53: fix an off by one in checking "vlan->vid"
    - gpio: mvebu: fix pwm .get_state period calculation
    - Revert "mm/slub: fix a memory leak in sysfs_slab_add()"
    - futex: Ensure the correct return value from futex_lock_pi()
    - futex: Replace pointless printk in fixup_owner()
    - futex: Provide and use pi_state_update_owner()
    - rtmutex: Remove unused argument from rt_mutex_proxy_unlock()
    - futex: Use pi_state_update_owner() in put_pi_state()
    - futex: Simplify fixup_pi_state_owner()
    - futex: Handle faults correctly for PI futexes
    - tracing: Fix race in trace_open and buffer resize call
    - fs: move I_DIRTY_INODE to fs.h
    - writeback: Drop I_DIRTY_TIME_EXPIRE
    - fs: fix lazytime expiration handling in __writeback_single_inode()
    - mmc: core: don't initialize block size from ext_csd if not present
    - scsi: qedi: Correct max length of CHAP secret
    - riscv: Fix kernel time_init()
    - HID: Ignore battery for Elan touchscreen on ASUS UX550
    - clk: tegra30: Add hda clock default rates to clock driver
    - drm/nouveau/mmu: fix vram heap sizing
    - scsi: megaraid_sas: Fix MEGASAS_IOC_FIRMWARE regression
    - can: peak_usb: fix use after free bugs
    - serial: mvebu-uart: fix tx lost characters at power off
    - driver core: Extend device_is_dependent()
    - net_sched: reject silly cell_log in qdisc_get_rtab()
    - tools: Factor HOSTCC, HOSTLD, HOSTAR definitions
  * Enforce CONFIG_DRM_BOCHS=m (LP: #1916290)
    - [Config] Enforce CONFIG_DRM_BOCHS=m
  * Please trust Canonical Livepatch Service kmod signing key (LP: #1898716)
    - [Config] enable CONFIG_MODVERSIONS=y
    - [Packaging] build canonical-certs.pem from branch/arch certs
    - [Config] add Canonical Livepatch Service key to SYSTEM_TRUSTED_KEYS
    - [Config] add ubuntu-drivers key to SYSTEM_TRUSTED_KEYS

 -- Kleber Sacilotto de Souza <kleber.souza@xxxxxxxxxxxxx>  Tue, 13 Apr
2021 10:08:10 +0200

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

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-13095

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-29154

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-3348

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https://bugs.launchpad.net/bugs/1922997

Title:
  P8 node entei unable to boot with 4.15.0-141.145~16.04.1

Status in ubuntu-kernel-tests:
  New
Status in linux-hwe package in Ubuntu:
  Invalid
Status in linux-hwe source package in Xenial:
  Fix Released

Bug description:
  [Impact]
  Enabling CONFIG_MODVERSIONS on xenial/linux-hwe (via rebase on bionic/linux, see bug 1898716) is causing the kernel to fail booting on ppc64el as the modules can't be loaded because of the mismatch of the module_layout symbol.

  [    7.635173] raid0: disagrees about version of symbol module_layout

  [Fix]
  The proposed fix is to disable CONFIG_MODVERSIONS and unset CONFIG_SYSTEM_TRUSTED_KEYS via the 'local-mangle' script which gets called by the 'open' script after the rebase. Making the changes directly on the config or annotations file is not persistent as these files are synced from master.

  This is a temporary fix until the root cause can be found.

  [Test case]
  Boot the kernel on a xenial ppc64el system.

  [Regression potential]
  This config option has been enabled on Bionic to support rebuilding the lrm modules without the need to rebuild the kernel. There are no lrm modules in Xenial, so it should be safe to keep it disabled.

  [Original Description]

  Tested manually, this node can boot with 4.15.0-140-generic

  However with 4.15.0-141.145~16.04.1 in proposed, it will drop into
  initramfs:

  [    9.547985] usb 1-3.4: Manufacturer: American Megatrends Inc.
  [    9.563800] hid: disagrees about version of symbol module_layout
  [    9.563949] hid: disagrees about version of symbol module_layout
  [    9.692066] libcrc32c: disagrees about version of symbol module_layout
  [   12.593593] raid10: disagrees about version of symbol module_layout
  done.
  Begin: Running /scripts/init-premount ... done.
  Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
  Begin: Running /scripts/local-premount ... [   12.963251] raid6_pq: disagrees about version of symbol module_layout
  done.
  Begin: Waiting for root file system ... Begin: Running /scripts/local-block ... mdadm: CREATE group disk not found
  mdadm: No devices listed in conf file were found.
  done.
  Begin: Running /scripts/local-block ... mdadm: CREATE group disk not found
  mdadm: No devices listed in conf file were found.
  done.
  (this mdadm message repeats)
  Gave up waiting for root device.  Common problems:
   - Boot args (cat /proc/cmdline)
     - Check rootdelay= (did the system wait long enough?)
     - Check root= (did the system wait for the right device?)
   - Missing modules (cat /proc/modules; ls /dev)
  ALERT!  UUID=348b5e78-915d-47b0-93db-3eca0d8f048e does not exist.  Dropping to a shell!
  [  204.831089] hid: disagrees about version of symbol module_layout

  BusyBox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1.4) built-in shell (ash)
  Enter 'help' for a list of built-in commands.

  (initramfs)

  Please find attachment for the boot log.

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