Re: [PATCH v3 0/3] KVM: x86: Out-of-bounds access in kvm_recalculate_phys_map()

[Sean Christopherson]

On Fri, 02 Jun 2023 16:32:47 -0700, Sean Christopherson wrote:
> In Michal's words...
> 
> kvm_recalculate_apic_map() creates the APIC map iterating over the list of
> vCPUs twice. First to find the max APIC ID and allocate a max-sized buffer,
> then again, calling kvm_recalculate_phys_map() for each vCPU. This opens a
> race window: value of max APIC ID can increase _after_ the buffer was
> allocated.
> 
> [...]

Applied patch 2 with fixup for the typo to kvm-x86 misc.  Note, patches 1 and 3
went into 6.5.

[2/3] KVM: x86: Retry APIC optimized map recalc if vCPU is added/enabled
      https://github.com/kvm-x86/linux/commit/41e90a69a49b

--
https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes