linux-kernel - Re: [PATCH] KVM: arm64: nested: fix VNCR TLB ASID match logic for non-Global entries

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Message-Id: <175706523473.1669883.17269564627952159753.b4-ty@linux.dev>
Date: Fri,  5 Sep 2025 02:41:10 -0700
From: Oliver Upton <oliver.upton@...ux.dev>
To: kvmarm@...ts.linux.dev,
	Geonha Lee <w1nsom3gna@...ea.ac.kr>
Cc: Oliver Upton <oliver.upton@...ux.dev>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Marc Zyngier <maz@...nel.org>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>
Subject: Re: [PATCH] KVM: arm64: nested: fix VNCR TLB ASID match logic for non-Global entries

On Thu, 04 Sep 2025 00:04:21 +0900, Geonha Lee wrote:
> kvm_vncr_tlb_lookup() is supposed to return true when the cached VNCR
> TLB entry is valid for the current context. For non-Global entries, that
> means the entry’s ASID must match the current ASID.
> 
> The current code returns true when the ASIDs do *not* match, which
> inverts the logic. This is a potential vulnerability:
> 
> [...]

Applied to fixes, thanks!

[1/1] KVM: arm64: nested: fix VNCR TLB ASID match logic for non-Global entries
      https://git.kernel.org/kvmarm/kvmarm/c/06f66db9bda4

--
Best,
Oliver