linux-kernel - Re: [PATCH v2] KVM: x86/mmu: x86: Don't overflow lpage

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Date: Mon,  8 Apr 2024 19:01:25 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, pbonzini@...hat.com, chao.p.peng@...ux.intel.com, 
	isaku.yamahata@...el.com, Rick Edgecombe <rick.p.edgecombe@...el.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] KVM: x86/mmu: x86: Don't overflow lpage_info when
 checking attributes

On Thu, 14 Mar 2024 14:29:02 -0700, Rick Edgecombe wrote:
> Fix KVM_SET_MEMORY_ATTRIBUTES to not overflow lpage_info array and trigger
> KASAN splat, as seen in the private_mem_conversions_test selftest.
> 
> When memory attributes are set on a GFN range, that range will have
> specific properties applied to the TDP. A huge page cannot be used when
> the attributes are inconsistent, so they are disabled for those the
> specific huge pages. For internal KVM reasons, huge pages are also not
> allowed to span adjacent memslots regardless of whether the backing memory
> could be mapped as huge.
> 
> [...]

Applied to kvm-x86 fixes, thanks!

[1/1] KVM: x86/mmu: x86: Don't overflow lpage_info when checking attributes
      https://github.com/kvm-x86/linux/commit/992b54bd083c

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