On October 20, 2022 1:59:48 AM PDT, Borislav Petkov <bp@xxxxxxxxx> wrote: >On Wed, Sep 28, 2022 at 01:49:34PM +0300, Maxim Levitsky wrote: >> Patch 5 is the main fix - it makes the kernel to be tolerant to a >> broken CPUID config (coming hopefully from hypervisor), where you have >> a feature (AVX2 in my case) but not a feature on which this feature >> depends (AVX). > >I really really don't like it when people are fixing the wrong thing. > >Why does the kernel need to get fixed when something else can't get its >CPUID dependencies straight? I don't even want to know why something >would set AVX2 without AVX?!?! > >Srsly. > >Some of your other bits look sensible and I'd take a deeper look but >this does not make any sense. This is a hypervisor problem - not a >kernel one. > >Thx. > Yes, this is utterly nonsensical and it will break user space applications left, right, and center.
