Re: [PATCH] KVM: x86/mmu: Release the pfn in handle_abnormal_pfn() error path

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Subject: Re: [PATCH] KVM: x86/mmu: Release the pfn in handle_abnormal_pfn() error path
From: Sean Christopherson <seanjc@xxxxxxxxxx>
Date: Fri, 21 Oct 2022 15:11:50 +0000
Cc: kvm@xxxxxxxxxxxxxxx, pbonzini@xxxxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, bp@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, hpa@xxxxxxxxx, will@xxxxxxxxxx, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <20221021111932.3291560-1-tabba@google.com>
References: <20221021111932.3291560-1-tabba@google.com>

On Fri, Oct 21, 2022, Fuad Tabba wrote:
> Currently in case of error it returns without releasing the pfn
> faulted in earlier.

handle_abnormal_pfn() returns something other than RET_PF_CONTINUE if and only if
there was no pfn to fault-in, i.e. it only handles error and no-slot pfns.

References:
- [PATCH] KVM: x86/mmu: Release the pfn in handle_abnormal_pfn() error path
  - From: Fuad Tabba

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