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SubjectRe: [syzbot] WARNING in static_key_slow_try_dec (2)
On Tue, Oct 12, 2021, Sean Christopherson wrote:
> On Sun, Oct 10, 2021, Tetsuo Handa wrote:
> > Hello.
> >
> > Commit 4547700a4d190ac4 ("KVM: x86: Consolidate APIC base RESET initialization code")
>
> That's definitely where the error was made visible,

I take that back, the bug was likely visible even before the redundant vendor code
was dropped. Doesn't change the fix in any way though.

> but commit 421221234ada ("KVM: x86: Open code necessary bits of
> kvm_lapic_set_base() at vCPU RESET") is the real culprit. I'll send a patch
> later today. I'm leaning toward a partial revert with some extra comments.
>
> Thanks for the debug! I was having trouble reproducing the syzbot report.

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