Re: [PATCH 0/2] KVM: x86: Convert all runtime WARNs to ONCE

[Yosry Ahmed]

On Mon, Oct 26, 2026 at 10:36 AM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
>
> On Fri, Oct 23, 2026, Yosry Ahmed wrote:
> > On Thu, Oct 22, 2026 at 2:55 PM Sean Christopherson <seanjc@xxxxxxxxxx> wrote:
> > >
> > > Convert all bare WARN() and WARN_ON() runtime usage, i.e. WARNs that aren't
> > > strictly scoped to module init/exit, or similar, to ONCE() variants for what
> > > should be fairly obvious reasons at this point.
> >
> > Do you wanna CC stable?
>
> Not really?  Maybe?  I worry that this will generate an absurd number of conflicts
> and also have "misses" in older kernels, to the point where it oculd do more harm
> than good.
>
> I could be convinced this should be tagged for stable@, though honestly it might
> be better to omit the automatic backport trigger and just rely on someone to
> "manually" provide equivalent patches.

I can just see this ultimately preventing a DoS and if it lands on any
stable kernel it should be a win, but yeah probably manual backports
are needed :/