Comment 0 for bug 1702164

we updated Kernel of Ubuntu 16.04 from 4.4.0-81-generic to generic_4.4.0-83.106 we had multiple reboots, and below appeared during the boot :

[231489.162816] Kernel panic - not syncing: Fatal exception in interrupt
[231490.197513] Shutting down cpus with NMI
[231490.210772] Kernel Offset: disabled
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 4.4.0-83-generic (buildd@lgw01-29) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4) ) #106-Ubuntu SMP Mon Jun 26 17:54:43 UTC 2017 (Ubuntu 4.4.0-83.106-generic 4.4.70)
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-83-generic root=UUID=e675b47c-3493-4ef8-8b6f-44acb3d1adb9 ro net.ifnames=0 biosdevname=0 cgroup_enable=memory swapaccount=1 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 0x0000000000100000-0x000000007fffffff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000fc000000-0x00000000ffffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000f47fffffff] 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 = 0xf480000 max_arch_pfn = 0x400000000
[ 0.000000] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WC UC- WT
[ 0.000000] e820: last_pfn = 0x80000 max_arch_pfn = 0x400000000
[ 0.000000] found SMP MP-table at [mem 0x000fbc20-0x000fbc2f] mapped at [ffff8800000fbc20]
[ 0.000000] Scanning 1 areas for low memory corruption
[ 0.000000] Using GB pages for direct mapping
[ 0.000000] RAMDISK: [mem 0x3612a000-0x3708cfff]
[ 0.000000] ACPI: Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 0x00000000000EA020 000024 (v02 Xen )
[ 0.000000] ACPI: XSDT 0x00000000FC014140 00005C (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: FACP 0x00000000FC0131A0 0000F4 (v04 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: DSDT 0x00000000FC001CE0 011438 (v02 Xen HVM 00000000 INTL 20090123)
[ 0.000000] ACPI: FACS 0x00000000FC001CA0 000040
[ 0.000000] ACPI: FACS 0x00000000FC001CA0 000040
[ 0.000000] ACPI: APIC 0x00000000FC0132A0 000460 (v02 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: SRAT 0x00000000FC013780 0008A8 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: HPET 0x00000000FC014050 000038 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: WAET 0x00000000FC014090 000028 (v01 Xen HVM 00000000 HVML 00000000)
[ 0.000000] ACPI: SSDT 0x00000000FC0140C0 000031 (v02 Xen HVM 00000000 INTL 20090123)
[ 0.000000] ACPI: SSDT 0x00000000FC014100 000031 (v02 Xen HVM 00000000 INTL 20090123)