This bug was fixed in the package linux - 4.4.0-23.41 --------------- linux (4.4.0-23.41) xenial; urgency=low
[ Kamal Mostafa ] * Release Tracking Bug - LP: #1582431 * zfs: disable module checks for zfs when cross-compiling (LP: #1581127) - [Packaging] disable zfs module checks when cross-compiling * Xenial update to v4.4.10 stable release (LP: #1580754) - Revert "UBUNTU: SAUCE: (no-up) ACPICA: Dispatcher: Update thread ID for recursive method calls" - Revert "UBUNTU: SAUCE: nbd: ratelimit error msgs after socket close" - Revert: "powerpc/tm: Check for already reclaimed tasks" - RDMA/iw_cxgb4: Fix bar2 virt addr calculation for T4 chips - ipvs: handle ip_vs_fill_iph_skb_off failure - ipvs: correct initial offset of Call-ID header search in SIP persistence engine - ipvs: drop first packet to redirect conntrack - mfd: intel-lpss: Remove clock tree on error path - nbd: ratelimit error msgs after socket close - ata: ahci_xgene: dereferencing uninitialized pointer in probe - mwifiex: fix corner case association failure - CNS3xxx: Fix PCI cns3xxx_write_config() - clk-divider: make sure read-only dividers do not write to their register - soc: rockchip: power-domain: fix err handle while probing - clk: rockchip: free memory in error cases when registering clock branches - clk: meson: Fix meson_clk_register_clks() signature type mismatch - clk: qcom: msm8960: fix ce3_core clk enable register - clk: versatile: sp810: support reentrance - clk: qcom: msm8960: Fix ce3_src register offset - lpfc: fix misleading indentation - ath9k: ar5008_hw_cmn_spur_mitigate: add missing mask_m & mask_p initialisation - mac80211: fix statistics leak if dev_alloc_name() fails - tracing: Don't display trigger file for events that can't be enabled - MD: make bio mergeable - Minimal fix-up of bad hashing behavior of hash_64() - mm, cma: prevent nr_isolated_* counters from going negative - mm/zswap: provide unique zpool name - ARM: EXYNOS: Properly skip unitialized parent clock in power domain on - ARM: SoCFPGA: Fix secondary CPU startup in thumb2 kernel - xen: Fix page <-> pfn conversion on 32 bit systems - xen/balloon: Fix crash when ballooning on x86 32 bit PAE - xen/evtchn: fix ring resize when binding new events - HID: wacom: Add support for DTK-1651 - HID: Fix boot delay for Creative SB Omni Surround 5.1 with quirk - Input: zforce_ts - fix dual touch recognition - proc: prevent accessing /proc/<PID>/environ until it's ready - mm: update min_free_kbytes from khugepaged after core initialization - batman-adv: fix DAT candidate selection (must use vid) - batman-adv: Check skb size before using encapsulated ETH+VLAN header - batman-adv: Fix broadcast/ogm queue limit on a removed interface - batman-adv: Reduce refcnt of removed router when updating route - writeback: Fix performance regression in wb_over_bg_thresh() - MAINTAINERS: Remove asterisk from EFI directory names - x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO - ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value - ARC: Add missing io barriers to io{read,write}{16,32}be() - x86/sysfb_efi: Fix valid BAR address range check - ACPICA: Dispatcher: Update thread ID for recursive method calls - powerpc: Fix bad inline asm constraint in create_zero_mask() - libahci: save port map for forced port map - ata: ahci-platform: Add ports-implemented DT bindings. - USB: serial: cp210x: add ID for Link ECU - USB: serial: cp210x: add Straizona Focusers device ids - nvmem: mxs-ocotp: fix buffer overflow in read - gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading - drm/amdgpu: make sure vertical front porch is at least 1 - drm/amdgpu: set metadata pointer to NULL after freeing. - iio: ak8975: Fix NULL pointer exception on early interrupt - iio: ak8975: fix maybe-uninitialized warning - drm/radeon: make sure vertical front porch is at least 1 - drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume - drm/i915: Fix eDP low vswing for Broadwell - drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW - drm/i915: Fake HDMI live status - lib/test-string_helpers.c: fix and improve string_get_size() tests - drm/i915/skl: Fix DMC load on Skylake J0 and K0 - Linux 4.4.10 * HDMI audio playback noise observed on AMD Polaris 10/11 GPU (LP: #1577288) - ALSA: hda: add AMD Polaris-10/11 AZ PCI IDs with proper driver caps * [i915_bpo] Update i915 backport driver (LP: #1580114) - SAUCE: i915_bpo: Drop is_preliminary from BXT/KBL. - SAUCE: i915_bpo: Sync with v4.6-rc7 * CVE-2016-4486 (LP: #1578497) - net: fix infoleak in rtnetlink * CVE-2016-4485 (LP: #1578496) - net: fix infoleak in llc * drm.ko < kernel version 4.5 has a dead lock bug (LP: #1579610) - drm: Balance error path for GEM handle allocation * Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler (LP: #1574982) - SAUCE: (no-up) disable -pie when gcc has it enabled by default * system freeze after vt switching (LP: #1542939) - drm/atomic: Add __drm_atomic_helper_connector_reset, v2. - drm/atomic: Remove drm_atomic_connectors_for_crtc. * CVE-2016-4558 (LP: #1579140) - bpf: fix refcnt overflow * Kernel Panic on EC2 After Upgrading from 14.04 to 16.04 via do-release- upgrade -d (LP: #1573231) - SAUCE: (no-up) x86/topology: Handle CPUID bogosity gracefully * PCI Call Traces hw csum failure in dmesg with 4.4.0-2-generic (LP: #1544978) - net/mlx4_en: Fix endianness bug in IPV6 csum calculation * Missing libunwind support in perf (LP: #1248289) - [Config] Add liblzma-dev to enable libunwind support in perf * thunderbolt hotplug is broken (LP: #1577898) - SAUCE: (no-up) ACPICA: Dispatcher: Update thread ID for recursive method calls * Kernel can be oopsed using remap_file_pages (LP: #1558120) - SAUCE: mm/mmap: fix oopsing on remap_file_pages * ZFS is confused by user namespaces (uid/gid mapping) when used with acltype=posixac (LP: #1567558) - zfs: Fix user namespaces uid/gid mapping * oops when propagating mounts into containers - RIP: 0010:[<ffffffff8123cb3e>] [<ffffffff8123cb3e>] propagate_one+0xbe/0x1c0 (LP: #1572316) - fs/pnode.c: treat zero mnt_group_id-s as unequal - propogate_mnt: Handle the first propogated copy being a slave * OOPS on wily+ for Haswell-ULT and Broadwell (LP: #1577748) - PNP: Add Broadwell to Intel MCH size workaround - PNP: Add Haswell-ULT to Intel MCH size workaround * Xenial update to v4.4.9 stable release (LP: #1578798) - block: loop: fix filesystem corruption in case of aio/dio - x86/mce: Avoid using object after free in genpool - kvm: x86: do not leak guest xcr0 into host interrupt handlers - ARM: dts: AM43x-epos: Fix clk parent for synctimer - ARM: mvebu: Correct unit address for linksys - ARM: OMAP2: Fix up interconnect barrier initialization for DRA7 - ARM: OMAP2+: hwmod: Fix updating of sysconfig register - assoc_array: don't call compare_object() on a node - usb: xhci: applying XHCI_PME_STUCK_QUIRK to Intel BXT B0 host - xhci: resume USB 3 roothub first - usb: xhci: fix wild pointers in xhci_mem_cleanup - xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers - usb: hcd: out of bounds access in for_each_companion - usb: gadget: f_fs: Fix use-after-free - dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros - dm cache metadata: fix cmd_read_lock() acquiring write lock - lib: lz4: fixed zram with lz4 on big endian machines - debugfs: Make automount point inodes permanently empty - dmaengine: dw: fix master selection - dmaengine: hsu: correct use of channel status register - dmaengine: pxa_dma: fix the maximum requestor line - sched/cgroup: Fix/cleanup cgroup teardown/init - x86/mm/xen: Suppress hugetlbfs in PV guests - x86 EDAC, sb_edac.c: Repair damage introduced when "fixing" channel address - ALSA: hda - Don't trust the reported actual power state - ALSA: hda/realtek - Add ALC3234 headset mode for Optiplex 9020m - ALSA: hda - Keep powering up ADCs on Cirrus codecs - ALSA: hda - add PCI ID for Intel Broxton-T - ALSA: pcxhr: Fix missing mutex unlock - ALSA: hda - Add dock support for ThinkPad X260 - asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic() - futex: Handle unlock_pi race gracefully - futex: Acknowledge a new waiter in counter before plist - drm/nouveau/core: use vzalloc for allocating ramht - drm/qxl: fix cursor position with non-zero hotspot - drm/i915: Fix race condition in intel_dp_destroy_mst_connector() - Revert "drm/radeon: disable runtime pm on PX laptops without dGPU power control" - Revert "drm/amdgpu: disable runtime pm on PX laptops without dGPU power control" - cpufreq: intel_pstate: Fix processing for turbo activation ratio - iwlwifi: pcie: lower the debug level for RSA semaphore access - iwlwifi: mvm: fix memory leak in paging - crypto: ccp - Prevent information leakage on export - crypto: sha1-mb - use corrcet pointer while completing jobs - crypto: talitos - fix crash in talitos_cra_init() - crypto: talitos - fix AEAD tcrypt tests - powerpc: scan_features() updates incorrect bits for REAL_LE - powerpc: Update cpu_user_features2 in scan_features() - powerpc: Update TM user feature bits in scan_features() - nl80211: check netlink protocol in socket release notification - netlink: don't send NETLINK_URELEASE for unbound sockets - Input: pmic8xxx-pwrkey - fix algorithm for converting trigger delay - xen kconfig: don't "select INPUT_XEN_KBDDEV_FRONTEND" - pinctrl: mediatek: correct debounce time unit in mtk_gpio_set_debounce - pinctrl: single: Fix pcs_parse_bits_in_pinctrl_entry to use __ffs than ffs - iommu/amd: Fix checking of pci dma aliases - iommu/dma: Restore scatterlist offsets correctly - drm/amdgpu: when suspending, if uvd/vce was running. need to cancel delay work. - drm/amdgpu: use defines for CRTCs and AMFT blocks - drm/amdgpu: bump the afmt limit for CZ, ST, Polaris - amdgpu/uvd: add uvd fw version for amdgpu - drm/amdgpu: fix regression on CIK (v2) - drm/radeon: add a quirk for a XFX R9 270X - drm/radeon: fix initial connector audio value - drm/radeon: forbid mapping of userptr bo through radeon device file - drm/radeon: fix vertical bars appear on monitor (v2) - drm: Loongson-3 doesn't fully support wc memory - drm/nouveau/gr/gf100: select a stream master to fixup tfb offset queries - drm/dp/mst: Validate port in drm_dp_payload_send_msg() - drm/dp/mst: Restore primary hub guid on resume - drm/dp/mst: Get validated port ref in drm_dp_update_payload_part1() - pwm: brcmstb: Fix check of devm_ioremap_resource() return code - drm/i915: Cleanup phys status page too - drm/i915: skl_update_scaler() wants a rotation bitmask instead of bit number - drm/amdkfd: uninitialized variable in dbgdev_wave_control_set_registers() - drm/i915: Fixup the free space logic in ring_prepare - drm/i915: Use fw_domains_put_with_fifo() on HSW - perf intel-pt: Fix segfault tracing transactions - i2c: cpm: Fix build break due to incompatible pointer types - i2c: exynos5: Fix possible ABBA deadlock by keeping I2C clock prepared - toshiba_acpi: Fix regression caused by hotkey enabling value - EDAC: i7core, sb_edac: Don't return NOTIFY_BAD from mce_decoder callback - ASoC: s3c24xx: use const snd_soc_component_driver pointer - ASoC: ssm4567: Reset device before regcache_sync() - ASoC: dapm: Make sure we have a card when displaying component widgets - ASoC: rt5640: Correct the digital interface data select - vb2-memops: Fix over allocation of frame vectors - v4l2-dv-timings.h: fix polarity for 4k formats - cxl: Keep IRQ mappings on context teardown - IB/mlx5: Expose correct max_sge_rd limit - IB/security: Restrict use of the write() interface - efi: Fix out-of-bounds read in variable_matches() - efi: Expose non-blocking set_variable() wrapper to efivars - x86/apic: Handle zero vector gracefully in clear_vector_irq() - workqueue: fix ghost PENDING flag while doing MQ IO - slub: clean up code for kmem cgroup support to kmem_cache_free_bulk - cgroup, cpuset: replace cpuset_post_attach_flush() with cgroup_subsys->post_attach callback - memcg: relocate charge moving from ->attach to ->post_attach - mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check - numa: fix /proc/<pid>/numa_maps for THP - mm: vmscan: reclaim highmem zone if buffer_heads is over limit - mm/hwpoison: fix wrong num_poisoned_pages accounting - cgroup: make sure a parent css isn't freed before its children - videobuf2-core: Check user space planes array in dqbuf - videobuf2-v4l2: Verify planes array in buffer dequeueing - Revert "regulator: core: Fix nested locking of supplies" - regulator: core: fix regulator_lock_supply regression - regulator: core: Ensure we lock all regulators - regulator: core: Fix nested locking of supplies - locking/mcs: Fix mcs_spin_lock() ordering - spi/rockchip: Make sure spi clk is on in rockchip_spi_set_cs - irqchip/sunxi-nmi: Fix error check of of_io_request_and_map() - irqchip/mxs: Fix error check of of_io_request_and_map() - regulator: s5m8767: fix get_register() error handling - paride: make 'verbose' parameter an 'int' again - scsi_dh: force modular build if SCSI is a module - fbdev: da8xx-fb: fix videomodes of lcd panels - misc/bmp085: Enable building as a module - misc: mic/scif: fix wrap around tests - PM / OPP: Initialize u_volt_min/max to a valid value - PM / Domains: Fix removal of a subdomain - rtc: hym8563: fix invalid year calculation - rtc: vr41xx: Wire up alarm_irq_enable - rtc: ds1685: passing bogus values to irq_restore - rtc: rx8025: remove rv8803 id - rtc: max77686: Properly handle regmap_irq_get_virq() error code - drivers/misc/ad525x_dpot: AD5274 fix RDAC read back errors - perf evlist: Reference count the cpu and thread maps at set_maps() - x86/mm/kmmio: Fix mmiotrace for hugepages - ext4: fix NULL pointer dereference in ext4_mark_inode_dirty() - serial: sh-sci: Remove cpufreq notifier to fix crash/deadlock - mtd: spi-nor: remove micron_quad_enable() - mtd: brcmnand: Fix v7.1 register offsets - mtd: nand: Drop mtd.owner requirement in nand_scan - perf hists browser: Only offer symbol scripting when a symbol is under the cursor - perf tools: handle spaces in file names obtained from /proc/pid/maps - perf stat: Document --detailed option - ext4: fix races between page faults and hole punching - ext4: move unlocked dio protection from ext4_alloc_file_blocks() - ext4: fix races between buffered IO and collapse / insert range - ext4: fix races of writeback with punch hole and zero range - ARM: OMAP3: Add cpuidle parameters table for omap3430 - ARM: prima2: always enable reset controller - ARM: EXYNOS: select THERMAL_OF - ARM: dts: armada-375: use armada-370-sata for SATA - ARM: dts: pxa: fix dma engine node to pxa3xx-nand - bus: imx-weim: Take the 'status' property value into account - jme: Do not enable NIC WoL functions on S0 - jme: Fix device PM wakeup API usage - unbreak allmodconfig KCONFIG_ALLCONFIG=... - thermal: rockchip: fix a impossible condition caused by the warning - sunrpc/cache: drop reference when sunrpc_cache_pipe_upcall() detects a race - megaraid_sas: add missing curly braces in ioctl handler - stm class: Select CONFIG_SRCU - extcon: max77843: Use correct size for reading the interrupt register - Linux 4.4.9 * Stoney powerplay support (LP: #1578305) - amdgpu/powerplay: Add Stoney to list of early init cases * CVE-2016-2117 (LP: #1561403) - atl2: Disable unimplemented scatter/gather feature * CVE-2016-2187 (LP: #1575706) - Input: gtco - fix crash on detecting device without endpoints * zfs posix default permissions lost on reboot or unmount (LP: #1574801) - Fix ZPL miswrite of default POSIX ACL * WARNING: at /build/linux-aWXT0l/linux-4.4.0/drivers/pci/pci.c:1595 [travis3EN] (LP: #1574697) - net/mlx4_core: Implement pci_resume callback - net/mlx4_core: Avoid repeated calls to pci enable/disable * Add support to thinkpad keyboard backlight (LP: #1574498) - thinkpad_acpi: Add support for keyboard backlight * Please enable kconfig X86_LEGACY_VM86 for i386 (LP: #1499089) - [Config] CONFIG_VM86=y, CONFIG_X86_LEGACY_VM86=y * Miscellaneous Ubuntu changes - updateconfigs for Linux v4.4.9 -- Kamal Mostafa <ka...@canonical.com> Mon, 16 May 2016 15:16:29 -0700 ** Changed in: linux (Ubuntu Yakkety) Status: Fix Committed => Fix Released ** CVE added: http://www.cve.mitre.org/cgi- bin/cvename.cgi?name=2016-2117 ** CVE added: http://www.cve.mitre.org/cgi- bin/cvename.cgi?name=2016-2187 ** CVE added: http://www.cve.mitre.org/cgi- bin/cvename.cgi?name=2016-4485 ** CVE added: http://www.cve.mitre.org/cgi- bin/cvename.cgi?name=2016-4486 ** CVE added: http://www.cve.mitre.org/cgi- bin/cvename.cgi?name=2016-4558 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1573231 Title: Kernel Panic on EC2 After Upgrading from 14.04 to 16.04 via do- release-upgrade -d Status in linux package in Ubuntu: Fix Released Status in linux source package in Xenial: Fix Committed Status in linux source package in Yakkety: Fix Released Bug description: [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Initializing cgroup subsys cpuacct [ 0.000000] Linux version 4.4.0-21-generic (buildd@lgw01-21) (gcc version 5.3.1 20160413 (Ubuntu 5.3.1-14ubuntu2) ) #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 (Ubuntu 4.4.0-21.37-generic 4.4.6) [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=8ea401db-b84b-4cd6-a628-d72f30bbf1e5 ro console=tty1 console=ttyS0 [ 0.000000] KERNEL supported cpus: [ 0.000000] Intel GenuineIntel [ 0.000000] AMD AuthenticAMD [ 0.000000] Centaur CentaurHauls [ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 [ 0.000000] x86/fpu: Supporting XSAVE feature 0x01: 'x87 floating point registers' [ 0.000000] x86/fpu: Supporting XSAVE feature 0x02: 'SSE registers' [ 0.000000] x86/fpu: Supporting XSAVE feature 0x04: 'AVX registers' [ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. [ 0.000000] x86/fpu: Using 'eager' FPU context switches. [ 0.000000] e820: BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009dfff] usable [ 0.000000] BIOS-e820: [mem 0x000000000009e000-0x000000000009ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000efffffff] usable [ 0.000000] BIOS-e820: [mem 0x00000000fc000000-0x00000000ffffffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x00000001efffffff] usable [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] SMBIOS 2.4 present. [ 0.000000] Hypervisor detected: Xen [ 0.000000] Xen version 4.2. [ 0.000000] Netfront and the Xen platform PCI driver have been compiled for this kernel: unplug emulated NICs. [ 0.000000] Blkfront and the Xen platform PCI driver have been compiled for this kernel: unplug emulated disks. [ 0.000000] You might have to change the root device [ 0.000000] from /dev/hd[a-d] to /dev/xvd[a-d] [ 0.000000] in your root= kernel command line option [ 0.000000] e820: last_pfn = 0x1f0000 max_arch_pfn = 0x400000000 [ 0.000000] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WC UC- WT [ 0.000000] e820: last_pfn = 0xf0000 max_arch_pfn = 0x400000000 [ 0.000000] found SMP MP-table at [mem 0x000fbba0-0x000fbbaf] mapped at [ffff8800000fbba0] [ 0.000000] Scanning 1 areas for low memory corruption [ 0.000000] RAMDISK: [mem 0x3407e000-0x36036fff] [ 0.000000] ACPI: Early table checksum verification disabled [ 0.000000] ACPI: RSDP 0x00000000000EA020 000024 (v02 Xen ) [ 0.000000] ACPI: XSDT 0x00000000FC00F5A0 000054 (v01 Xen HVM 00000000 HVML 00000000) [ 0.000000] ACPI: FACP 0x00000000FC00F260 0000F4 (v04 Xen HVM 00000000 HVML 00000000) [ 0.000000] ACPI: DSDT 0x00000000FC0035E0 00BBF6 (v02 Xen HVM 00000000 INTL 20090123) [ 0.000000] ACPI: FACS 0x00000000FC0035A0 000040 [ 0.000000] ACPI: FACS 0x00000000FC0035A0 000040 [ 0.000000] ACPI: APIC 0x00000000FC00F360 0000D8 (v02 Xen HVM 00000000 HVML 00000000) [ 0.000000] ACPI: HPET 0x00000000FC00F4B0 000038 (v01 Xen HVM 00000000 HVML 00000000) [ 0.000000] ACPI: WAET 0x00000000FC00F4F0 000028 (v01 Xen HVM 00000000 HVML 00000000) [ 0.000000] ACPI: SSDT 0x00000000FC00F520 000031 (v02 Xen HVM 00000000 INTL 20090123) [ 0.000000] ACPI: SSDT 0x00000000FC00F560 000031 (v02 Xen HVM 00000000 INTL 20090123) [ 0.000000] No NUMA configuration found [ 0.000000] Faking a node at [mem 0x0000000000000000-0x00000001efffffff] [ 0.000000] NODE_DATA(0) allocated [mem 0x1efff7000-0x1efffbfff] [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x0000000000001000-0x0000000000ffffff] [ 0.000000] DMA32 [mem 0x0000000001000000-0x00000000ffffffff] [ 0.000000] Normal [mem 0x0000000100000000-0x00000001efffffff] [ 0.000000] Device empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000000001000-0x000000000009dfff] [ 0.000000] node 0: [mem 0x0000000000100000-0x00000000efffffff] [ 0.000000] node 0: [mem 0x0000000100000000-0x00000001efffffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x00000001efffffff] [ 0.000000] ACPI: PM-Timer IO Port: 0xb008 [ 0.000000] IOAPIC[0]: apic_id 1, version 17, address 0xfec00000, GSI 0-47 [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 low level) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 low level) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 low level) [ 0.000000] Using ACPI (MADT) for SMP configuration information [ 0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000 [ 0.000000] smpboot: Allowing 15 CPUs, 13 hotplug CPUs [ 0.000000] PM: Registered nosave memory: [mem 0x00000000-0x00000fff] [ 0.000000] PM: Registered nosave memory: [mem 0x0009e000-0x0009ffff] [ 0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000dffff] [ 0.000000] PM: Registered nosave memory: [mem 0x000e0000-0x000fffff] [ 0.000000] PM: Registered nosave memory: [mem 0xf0000000-0xfbffffff] [ 0.000000] PM: Registered nosave memory: [mem 0xfc000000-0xffffffff] [ 0.000000] e820: [mem 0xf0000000-0xfbffffff] available for PCI devices [ 0.000000] Booting paravirtualized kernel on Xen HVM [ 0.000000] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns [ 0.000000] setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:15 nr_node_ids:1 [ 0.000000] PERCPU: Embedded 33 pages/cpu @ffff8801e7a00000 s98008 r8192 d28968 u262144 [ 0.000000] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes) [ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 1935240 [ 0.000000] Policy zone: Normal [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=8ea401db-b84b-4cd6-a628-d72f30bbf1e5 ro console=tty1 console=ttyS0 [ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes) [ 0.000000] Memory: 7621704K/7863924K available (8356K kernel code, 1278K rwdata, 3920K rodata, 1476K init, 1292K bss, 242220K reserved, 0K cma-reserved) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=15, Nodes=1 [ 0.000000] Hierarchical RCU implementation. [ 0.000000] Build-time adjustment of leaf fanout to 64. [ 0.000000] RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=15. [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=64, nr_cpu_ids=15 [ 0.000000] NR_IRQS:16640 nr_irqs:952 16 [ 0.000000] xen:events: Using 2-level ABI [ 0.000000] xen:events: Xen HVM callback vector for event delivery is enabled [ 0.000000] Console: colour VGA+ 80x25 [ 0.000000] console [tty1] enabled [ 0.000000] Cannot get hvm parameter CONSOLE_EVTCHN (18): -22! [ 0.000000] console [ttyS0] enabled [ 0.000000] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 30580167144 ns [ 0.000000] tsc: Detected 2500.038 MHz processor [ 0.012000] Calibrating delay loop (skipped), value calculated using timer frequency.. 5000.07 BogoMIPS (lpj=10000152) [ 0.016003] pid_max: default: 32768 minimum: 301 [ 0.020008] ACPI: Core revision 20150930 [ 0.029145] ACPI: 3 ACPI AML tables successfully acquired and loaded [ 0.032827] Security Framework initialized [ 0.036002] Yama: becoming mindful. [ 0.040021] AppArmor: AppArmor initialized [ 0.044434] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) [ 0.053113] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) [ 0.056758] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 0.064010] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 0.068206] Initializing cgroup subsys io [ 0.072005] Initializing cgroup subsys memory [ 0.076009] Initializing cgroup subsys devices [ 0.080004] Initializing cgroup subsys freezer [ 0.082912] Initializing cgroup subsys net_cls [ 0.084004] Initializing cgroup subsys perf_event [ 0.088004] Initializing cgroup subsys net_prio [ 0.092004] Initializing cgroup subsys hugetlb [ 0.095088] Initializing cgroup subsys pids [ 0.096059] CPU: Physical Processor ID: 0 [ 0.100763] mce: CPU supports 2 MCE banks [ 0.104024] Last level iTLB entries: 4KB 512, 2MB 8, 4MB 8 [ 0.108002] Last level dTLB entries: 4KB 512, 2MB 0, 4MB 0, 1GB 4 [ 0.113286] Freeing SMP alternatives memory: 28K (ffffffff820b2000 - ffffffff820b9000) [ 0.125920] ftrace: allocating 31878 entries in 125 pages [ 0.160059] divide error: 0000 [#1] SMP [ 0.163586] Modules linked in: [ 0.164000] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.4.0-21-generic #37-Ubuntu [ 0.164000] Hardware name: Xen HVM domU, BIOS 4.2.amazon 12/07/2015 [ 0.164000] task: ffff8801e6618000 ti: ffff8801e6620000 task.ti: ffff8801e6620000 [ 0.164000] RIP: 0010:[<ffffffff81f6f5de>] [<ffffffff81f6f5de>] smp_store_boot_cpu_info+0x51/0x17f [ 0.164000] RSP: 0000:ffff8801e6623ea8 EFLAGS: 00010286 [ 0.164000] RAX: 000000000000000e RBX: ffffffff81f34f60 RCX: 0000000000000000 [ 0.164000] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801e7a0a180 [ 0.164000] RBP: ffff8801e6623ec8 R08: 0000000000000000 R09: 0000000000007fff [ 0.164000] R10: ffffffff81a11ee0 R11: ffffffff81a11ec0 R12: 00000000ffffffff [ 0.164000] R13: 000000000000a0a0 R14: 000000000000a192 R15: 0000000000000000 [ 0.164000] FS: 0000000000000000(0000) GS:ffff8801e7a00000(0000) knlGS:0000000000000000 [ 0.164000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.164000] CR2: ffff8801effff000 CR3: 0000000001e0a000 CR4: 00000000001406f0 [ 0.164000] Stack: [ 0.164000] ffffffff81f34f60 0000000000000100 000000000000a0a0 0000000000000000 [ 0.164000] ffff8801e6623ef8 ffffffff81f6f763 ffffffff82089ef8 ffff8801e66186a8 [ 0.164000] 0000000000000001 0000000000000000 ffff8801e6623f08 ffffffff81f64e10 [ 0.164000] Call Trace: [ 0.164000] [<ffffffff81f6f763>] native_smp_prepare_cpus+0x57/0x2eb [ 0.164000] [<ffffffff81f64e10>] xen_hvm_smp_prepare_cpus+0x9/0x2e [ 0.164000] [<ffffffff81f5a0e5>] kernel_init_freeable+0xb3/0x212 [ 0.164000] [<ffffffff81817f30>] ? rest_init+0x80/0x80 [ 0.164000] [<ffffffff81817f3e>] kernel_init+0xe/0xe0 [ 0.164000] [<ffffffff8182488f>] ret_from_fork+0x3f/0x70 [ 0.164000] [<ffffffff81817f30>] ? rest_init+0x80/0x80 [ 0.164000] Code: 53 41 83 cc ff 49 c7 c6 92 a1 00 00 48 89 c7 f3 a5 66 c7 80 da 00 00 00 00 00 0f b7 35 b4 36 fc ff 8b 05 16 88 27 00 8d 44 06 ff <f7> f6 31 d2 89 05 78 4a fc ff 8d 86 ff 7f 00 00 f7 f6 be c0 00 [ 0.164000] RIP [<ffffffff81f6f5de>] smp_store_boot_cpu_info+0x51/0x17f [ 0.164000] RSP <ffff8801e6623ea8> [ 0.336005] ---[ end trace 1a9aebc980234339 ]--- [ 0.340017] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 0.340017] System won't boot at all, so there's a limit to the additional information I can get, but if nothing can be done from the above, let me know what/how to provide additional information needed. 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