Re: Linux: general protection fault in __vmx_vcpu_run with nested virtualization

[Greg KH <greg () kroah com>]

On Mon, Jan 06, 2025 at 05:01:49PM +0800, Linfeng Sun wrote:
> Hello list,
>
> A bug has been detected in the Linux kernel's nested virtualization implementation, which 
> can lead to a general protection fault in __vmx_vcpu_run when running a higher 
> version L1 hypervisor kernel on an L0 host kernel version predating the following 
> commit: https://github.com/torvalds/linux/commit/45779be5ced626db836e612e0dc638a1601abcf2

For those wanting to understand this, that means that any kernel version
from release of:
        3.17
to the following releases:
        4.9.331 4.14.296 4.19.262 5.4.220 5.10.150 5.15.75 5.19.17 6.0.3 6.1
is vulnerable, and anything newer than that (i.e. any kernel newer than
August of 2022) is just fine.

Hopefully everyone here is running a kernel newer than August of 2022,
but hey, who knows!

hope this helps,

greg k-h