strange segfaults in guest using usb stick wlan on the host

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Dear KVM Developers,

i have a strange problem with segfaults in a guest system
while compiling a linux kernel.

The basic setup (details below) is a ryzen cpu on a ab350 mainboard,
the host running ubuntu linux and guests running also debian based
linux.
Now i am compiling a vanilla linux kernel in the guest.
This will fail with random segfaults as soon as i enable a WLAN (USB
RTL8187L) connection in
the host system.
Apart from this everything is working fine.
As this WLAN is my default internet connection i did try different
virtualization setups
for almost a week until I could track down the problem.


The details:
CPU: Ryzen 7 2700X
same result using a Ryzen 5 1600

Mainboard: GA-AB350M-Gaming 3
Bios: i tested with three versions:  F31, F41d, F50a

host system:
i tested with the following systems as host all x86_64
ubuntu 19.10 kernel 5.3.0-26-generic
ubuntu 19.10 kernel 5.3.0-29-generic
ubuntu 20(development) kernel 5.4.0-14-generic

kvm:
4.0 (ubutu 19.10) and 4.2.0 (ubuntu 19.10 installed from sources)
4.2.0 (ubuntu 20 dev)

guest:
ubuntu 18.10 kernel 4.18.0-10-generic
debian 10 kernel 5.4.0-3-amd64

I use libvirt to launch the guests, so two example XML files are attached,
also the hypervisor info.
I tried a lot of different settings for cpu type and and cpu pinning
without much
difference.

task:
Compile linux kernel on guest using debian linuc sources 5.4.8 or
vanilla 5.5.2

This works fine as long as I do not enable my WLAN internet connection
on the host (USB stick: NetGear, Inc. WG111v2 54 Mbps Wireless [RealTek
RTL8187L])

If I enable the WLAN (in the host) the guest starts producing random
compiler errors like these;

./include/linux/mm.h:2041:1: internal compiler error: Segmentation fault 
static inline spinlock_t *pud_lockptr(struct mm_struct *mm, pud_t *pud)                                                                        
^~~~~~

./include/linux/quota.h:338:1: internal compiler error: in tree_to_uhwi, at tree.h:4278
 };
 ^
./arch/x86/include/asm/pgtable.h:163:1: internal compiler error: Segmentation fault
 {
 ^
elf.c:685:1: internal compiler error: Segmentation fault
 }
 ^

As soon as I disable the USB WLAN connection on the host (the USB stick
still
inserted) I can compile the kernels without any problem.

No valuable messages in the log files of the host and the guest system.

So I tested removing all Network Interfaces from the guest systems,
but this had no effect. Even without any networking a guest fails
compiling as soon as I
start the WLAN on the host system.

I checked for electrical interference by
- using a long USB cable to get the WLAN stick away from the PC ->
compilation fails
- using a laptop operating the USB WLAN stick right beside the PC ->
compilation works fine

I intensely tested the hosts RAM with memtest86+
stressed the host system with compile jobs,
even did memtests on the guests.
But everythings seems rock solid.

Does anyone have a clue, whats going on here,
or how i can debug this situation ?

Thanks,
Torsten

<domain type='kvm' id='7'>
  <name>ubuntu18.10</name>
  <uuid>6b2dc20e-350d-45da-bc52-a125ef9abc53</uuid>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0";>
      <libosinfo:os id="http://ubuntu.com/ubuntu/18.10"/>
    </libosinfo:libosinfo>
  </metadata>
  <memory unit='KiB'>4194304</memory>
  <currentMemory unit='KiB'>4194304</currentMemory>
  <vcpu placement='static'>3</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-q35-4.2'>hvm</type>
    <boot dev='hd'/>
    <bootmenu enable='yes'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <vmport state='off'/>
  </features>
  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>EPYC-IBPB</model>
    <vendor>AMD</vendor>
    <feature policy='require' name='x2apic'/>
    <feature policy='require' name='tsc-deadline'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='require' name='tsc_adjust'/>
    <feature policy='require' name='arch-capabilities'/>
    <feature policy='require' name='cmp_legacy'/>
    <feature policy='require' name='perfctr_core'/>
    <feature policy='require' name='clzero'/>
    <feature policy='require' name='virt-ssbd'/>
    <feature policy='require' name='rdctl-no'/>
    <feature policy='require' name='skip-l1dfl-vmentry'/>
    <feature policy='require' name='mds-no'/>
    <feature policy='disable' name='monitor'/>
    <feature policy='require' name='topoext'/>
  </cpu>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='writethrough' io='threads' discard='unmap' detect_zeroes='unmap'/>
      <source file='/data/qemu-vms/quadvtl04.qcow2' index='2'/>
      <backingStore/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
    </disk>
    <disk type='file' device='cdrom'>
      <driver name='qemu'/>
      <target dev='sda' bus='sata'/>
      <readonly/>
      <alias name='sata0-0-0'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <alias name='usb'/>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <alias name='usb'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <alias name='usb'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x2'/>
    </controller>
    <controller type='sata' index='0'>
      <alias name='ide'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pcie-root'>
      <alias name='pcie.0'/>
    </controller>
    <controller type='pci' index='1' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='1' port='0x10'/>
      <alias name='pci.1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
    </controller>
    <controller type='pci' index='2' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='2' port='0x11'/>
      <alias name='pci.2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
    </controller>
    <controller type='pci' index='3' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='3' port='0x12'/>
      <alias name='pci.3'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
    </controller>
    <controller type='pci' index='4' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='4' port='0x13'/>
      <alias name='pci.4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>
    </controller>
    <controller type='pci' index='5' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='5' port='0x14'/>
      <alias name='pci.5'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x4'/>
    </controller>
    <controller type='pci' index='6' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='6' port='0x15'/>
      <alias name='pci.6'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x5'/>
    </controller>
    <controller type='pci' index='7' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='7' port='0x16'/>
      <alias name='pci.7'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x6'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
    </controller>
    <interface type='network'>
      <mac address='52:54:00:97:b1:7e'/>
      <source network='network' portid='d1a1a895-177e-45a1-8a1c-734d0302223b' bridge='virbr1'/>
      <target dev='vnet0'/>
      <model type='virtio'/>
      <link state='up'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/1'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/1'>
      <source path='/dev/pts/1'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-7-ubuntu18.10/org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0' state='disconnected'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0' state='disconnected'/>
      <alias name='channel1'/>
      <address type='virtio-serial' controller='0' bus='0' port='2'/>
    </channel>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
      <address type='usb' bus='0' port='1'/>
    </input>
    <input type='mouse' bus='ps2'>
      <alias name='input1'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input2'/>
    </input>
    <graphics type='spice' port='5901' autoport='yes' listen='127.0.0.1'>
      <listen type='address' address='127.0.0.1'/>
      <image compression='off'/>
    </graphics>
    <sound model='ich9'>
      <alias name='sound0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1b' function='0x0'/>
    </sound>
    <video>
      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
    </video>
    <redirdev bus='usb' type='spicevmc'>
      <alias name='redir0'/>
      <address type='usb' bus='0' port='2'/>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
      <alias name='redir1'/>
      <address type='usb' bus='0' port='3'/>
    </redirdev>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/>
    </memballoon>
    <rng model='virtio'>
      <backend model='random'>/dev/urandom</backend>
      <alias name='rng0'/>
      <address type='pci' domain='0x0000' bus='0x06' slot='0x00' function='0x0'/>
    </rng>
  </devices>
  <seclabel type='dynamic' model='apparmor' relabel='yes'>
    <label>libvirt-6b2dc20e-350d-45da-bc52-a125ef9abc53</label>
    <imagelabel>libvirt-6b2dc20e-350d-45da-bc52-a125ef9abc53</imagelabel>
  </seclabel>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+64055:+108</label>
    <imagelabel>+64055:+108</imagelabel>
  </seclabel>
</domain>

<domain type='kvm' id='6'>
  <name>quadvtl03</name>
  <uuid>52ed6b72-6a4c-446c-a151-251411180cc8</uuid>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0";>
      <libosinfo:os id="http://debian.org/debian/10"/>
    </libosinfo:libosinfo>
  </metadata>
  <memory unit='KiB'>8216576</memory>
  <currentMemory unit='KiB'>8216576</currentMemory>
  <vcpu placement='static'>4</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-q35-4.2'>hvm</type>
    <bootmenu enable='no'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <vmport state='off'/>
  </features>
  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>EPYC-IBPB</model>
    <vendor>AMD</vendor>
    <feature policy='require' name='x2apic'/>
    <feature policy='require' name='tsc-deadline'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='require' name='tsc_adjust'/>
    <feature policy='require' name='arch-capabilities'/>
    <feature policy='require' name='cmp_legacy'/>
    <feature policy='require' name='perfctr_core'/>
    <feature policy='require' name='clzero'/>
    <feature policy='require' name='virt-ssbd'/>
    <feature policy='require' name='rdctl-no'/>
    <feature policy='require' name='skip-l1dfl-vmentry'/>
    <feature policy='require' name='mds-no'/>
    <feature policy='disable' name='monitor'/>
    <feature policy='require' name='topoext'/>
  </cpu>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <pm>
    <suspend-to-mem enabled='no'/>
    <suspend-to-disk enabled='no'/>
  </pm>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/data/qemu-vms/quadvtl03-temp.qcow2' index='2'/>
      <backingStore/>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0'/>
    </disk>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
      <source file='/data/qemu-vms/quadvtl03.qcow2' index='1'/>
      <backingStore/>
      <target dev='sda' bus='scsi'/>
      <boot order='1'/>
      <alias name='scsi0-0-0'/>
      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
    </disk>
    <controller type='sata' index='0'>
      <alias name='ide'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pcie-root'>
      <alias name='pcie.0'/>
    </controller>
    <controller type='pci' index='1' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='1' port='0x10'/>
      <alias name='pci.1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0' multifunction='on'/>
    </controller>
    <controller type='pci' index='2' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='2' port='0x11'/>
      <alias name='pci.2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x1'/>
    </controller>
    <controller type='pci' index='3' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='3' port='0x12'/>
      <alias name='pci.3'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x2'/>
    </controller>
    <controller type='pci' index='4' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='4' port='0x13'/>
      <alias name='pci.4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x3'/>
    </controller>
    <controller type='pci' index='5' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='5' port='0x14'/>
      <alias name='pci.5'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x4'/>
    </controller>
    <controller type='pci' index='6' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='6' port='0x15'/>
      <alias name='pci.6'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x5'/>
    </controller>
    <controller type='pci' index='7' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='7' port='0x16'/>
      <alias name='pci.7'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x6'/>
    </controller>
    <controller type='pci' index='8' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='8' port='0x17'/>
      <alias name='pci.8'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x7'/>
    </controller>
    <controller type='pci' index='9' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='9' port='0x18'/>
      <alias name='pci.9'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0' multifunction='on'/>
    </controller>
    <controller type='pci' index='10' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='10' port='0x19'/>
      <alias name='pci.10'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x1'/>
    </controller>
    <controller type='pci' index='11' model='pcie-to-pci-bridge'>
      <model name='pcie-pci-bridge'/>
      <alias name='pci.11'/>
      <address type='pci' domain='0x0000' bus='0x09' slot='0x00' function='0x0'/>
    </controller>
    <controller type='virtio-serial' index='0'>
      <alias name='virtio-serial0'/>
      <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
    </controller>
    <controller type='scsi' index='0' model='lsilogic'>
      <alias name='scsi0'/>
      <address type='pci' domain='0x0000' bus='0x0b' slot='0x01' function='0x0'/>
    </controller>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <alias name='usb'/>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <alias name='usb'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <alias name='usb'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x2'/>
    </controller>
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-6-quadvtl03/org.qemu.guest_agent.0'/>
      <target type='virtio' name='org.qemu.guest_agent.0' state='disconnected'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0' state='disconnected'/>
      <alias name='channel1'/>
      <address type='virtio-serial' controller='0' bus='0' port='2'/>
    </channel>
    <input type='tablet' bus='usb'>
      <alias name='input0'/>
      <address type='usb' bus='0' port='1'/>
    </input>
    <input type='mouse' bus='ps2'>
      <alias name='input1'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input2'/>
    </input>
    <graphics type='spice' port='5900' autoport='yes' listen='127.0.0.1'>
      <listen type='address' address='127.0.0.1'/>
      <image compression='off'/>
    </graphics>
    <video>
      <model type='vga' vram='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
    </memballoon>
    <rng model='virtio'>
      <backend model='random'>/dev/urandom</backend>
      <alias name='rng0'/>
      <address type='pci' domain='0x0000' bus='0x08' slot='0x00' function='0x0'/>
    </rng>
  </devices>
  <seclabel type='dynamic' model='apparmor' relabel='yes'>
    <label>libvirt-52ed6b72-6a4c-446c-a151-251411180cc8</label>
    <imagelabel>libvirt-52ed6b72-6a4c-446c-a151-251411180cc8</imagelabel>
  </seclabel>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+64055:+108</label>
    <imagelabel>+64055:+108</imagelabel>
  </seclabel>
</domain>

<sysinfo type='smbios'>
  <bios>
    <entry name='vendor'>American Megatrends Inc.</entry>
    <entry name='version'>F50a</entry>
    <entry name='date'>11/27/2019</entry>
    <entry name='release'>5.14</entry>
  </bios>
  <system>
    <entry name='manufacturer'>Gigabyte Technology Co., Ltd.</entry>
    <entry name='product'>AB350M-Gaming 3</entry>
    <entry name='version'>Default string</entry>
    <entry name='serial'>Default string</entry>
    <entry name='uuid'>031b021c-040d-05e1-1e06-a00700080009</entry>
    <entry name='sku'>Default string</entry>
    <entry name='family'>Default string</entry>
  </system>
  <baseBoard>
    <entry name='manufacturer'>Gigabyte Technology Co., Ltd.</entry>
    <entry name='product'>AB350M-Gaming 3-CF</entry>
    <entry name='version'>x.x</entry>
    <entry name='serial'>Default string</entry>
    <entry name='asset'>Default string</entry>
    <entry name='location'>Default string</entry>
  </baseBoard>
  <chassis>
    <entry name='manufacturer'>Default string</entry>
    <entry name='version'>Default string</entry>
    <entry name='serial'>Default string</entry>
    <entry name='asset'>Default string</entry>
    <entry name='sku'>Default string</entry>
  </chassis>
  <processor>
    <entry name='socket_destination'>AM4</entry>
    <entry name='type'>Central Processor</entry>
    <entry name='family'>Zen</entry>
    <entry name='manufacturer'>Advanced Micro Devices, Inc.</entry>
    <entry name='signature'>Family 23, Model 8, Stepping 2</entry>
    <entry name='version'>AMD Ryzen 7 2700X Eight-Core Processor</entry>
    <entry name='external_clock'>100 MHz</entry>
    <entry name='max_speed'>4350 MHz</entry>
    <entry name='status'>Populated, Enabled</entry>
    <entry name='serial_number'>Unknown</entry>
    <entry name='part_number'>Unknown</entry>
  </processor>
  <memory_device>
    <entry name='size'>16384 MB</entry>
    <entry name='form_factor'>DIMM</entry>
    <entry name='locator'>DIMM 0</entry>
    <entry name='bank_locator'>P0 CHANNEL A</entry>
    <entry name='type'>DDR4</entry>
    <entry name='type_detail'>Synchronous Unbuffered (Unregistered)</entry>
    <entry name='speed'>2400 MT/s</entry>
    <entry name='manufacturer'>Unknown</entry>
    <entry name='serial_number'>00000000</entry>
    <entry name='part_number'>CMK32GX4M2A2666C16</entry>
  </memory_device>
  <memory_device>
    <entry name='size'>8192 MB</entry>
    <entry name='form_factor'>DIMM</entry>
    <entry name='locator'>DIMM 1</entry>
    <entry name='bank_locator'>P0 CHANNEL A</entry>
    <entry name='type'>DDR4</entry>
    <entry name='type_detail'>Synchronous Unbuffered (Unregistered)</entry>
    <entry name='speed'>2400 MT/s</entry>
    <entry name='manufacturer'>A-DATA Technology</entry>
    <entry name='serial_number'>8F750000</entry>
    <entry name='part_number'>DDR4 2666 2OZ</entry>
  </memory_device>
  <memory_device>
    <entry name='size'>16384 MB</entry>
    <entry name='form_factor'>DIMM</entry>
    <entry name='locator'>DIMM 0</entry>
    <entry name='bank_locator'>P0 CHANNEL B</entry>
    <entry name='type'>DDR4</entry>
    <entry name='type_detail'>Synchronous Unbuffered (Unregistered)</entry>
    <entry name='speed'>2400 MT/s</entry>
    <entry name='manufacturer'>Unknown</entry>
    <entry name='serial_number'>00000000</entry>
    <entry name='part_number'>CMK32GX4M2A2666C16</entry>
  </memory_device>
  <memory_device>
    <entry name='size'>8192 MB</entry>
    <entry name='form_factor'>DIMM</entry>
    <entry name='locator'>DIMM 1</entry>
    <entry name='bank_locator'>P0 CHANNEL B</entry>
    <entry name='type'>DDR4</entry>
    <entry name='type_detail'>Synchronous Unbuffered (Unregistered)</entry>
    <entry name='speed'>2400 MT/s</entry>
    <entry name='manufacturer'>A-DATA Technology</entry>
    <entry name='serial_number'>8E750000</entry>
    <entry name='part_number'>DDR4 2666 2OZ</entry>
  </memory_device>
</sysinfo>


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