unchecked MSR access error: WRMSR to 0xda0

[Toralf Förster <toralf.foerster@gmx.de>]

I do get at all of my Debian bullseye VPS at Hetzner this message during 
boot (once):

Aug 16 06:08:42 uhu kernel: [1726344.567946] device-mapper: uevent: 
version 1.0.3
Aug 16 06:08:42 uhu kernel: [1726344.571939] device-mapper: ioctl: 
4.43.0-ioctl (2020-10-01) initialised: dm-devel@redhat.com
Aug 16 06:09:36 uhu kernel: [    0.000000] Linux version 5.10.0-17-amd64 
(debian-kernel@lists.debian.org) (gcc-10 (Debian 10.2.1-6) 10.2.1 
20210110, GNU ld (GNU Binutils for Debian) 2.35.2)
 #1 SMP Debian 5.10.136-1 (2022-08-13)
Aug 16 06:09:36 uhu kernel: [    0.000000] Command line: 
BOOT_IMAGE=/boot/vmlinuz-5.10.0-17-amd64 
root=UUID=a1c24a20-66b4-4e88-a92c-2e264ef511e7 ro consoleblank=0 
systemd.show_status=true c
onsole=tty1 console=ttyS0
Aug 16 06:09:36 uhu kernel: [    0.000000] unchecked MSR access error: 
WRMSR to 0xda0 (tried to write 0x0000000000000000) at rIP: 
0xffffffffb7a6e874 (native_write_msr+0x4/0x20)
Aug 16 06:09:36 uhu kernel: [    0.000000] Call Trace:
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? fpu__init_cpu_xstate+0xb4/0xf0
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? 
fpu__init_system_xstate+0x167/0x9e1
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? cpu_has_amd_erratum+0xa1/0xc0
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? fpu__init_system+0x11d/0x15e
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? early_cpu_init+0x498/0x4c0
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? setup_arch+0xb7/0xc6e
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? slab_is_available+0x5/0x20
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? start_kernel+0x64/0x599
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? load_ucode_bsp+0x4c/0xd1
Aug 16 06:09:36 uhu kernel: [    0.000000]  ? 
secondary_startup_64_no_verify+0xb0/0xbb
Aug 16 06:09:36 uhu kernel: [    0.000000] x86/fpu: Supporting XSAVE 
feature 0x001: 'x87 floating point registers'
Aug 16 06:09:36 uhu kernel: [    0.000000] x86/fpu: Supporting XSAVE 
feature 0x002: 'SSE registers'
Aug 16 06:09:36 uhu kernel: [    0.000000] x86/fpu: Supporting XSAVE 
feature 0x004: 'AVX registers'
Aug 16 06:09:36 uhu kernel: [    0.000000] x86/fpu: xstate_offset[2]: 
576, xstate_sizes[2]:  256
Aug 16 06:09:36 uhu kernel: [    0.000000] x86/fpu: Enabled xstate 
features 0x7, context size is 832 bytes, using 'compacted' format.


Is this issue related to the underlying Hetzner Hardware or to the package ?

--
Toralf

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