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From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.cs.columbia.edu, Will Deacon <will@kernel.org>
Cc: kernel-team@android.com, linux-arm-kernel@lists.infradead.org,
Subject: Re: [PATCH v2] KVM: arm64: Don't inherit exec permission across page-table levels
Date: Tue, 28 Jul 2020 10:37:22 +0100
Message-ID: <159592902849.3866216.16184306169833610349.b4-ty@kernel.org> (raw)
In-Reply-To: <20200723101714.15873-1-will@kernel.org>

On Thu, 23 Jul 2020 11:17:14 +0100, Will Deacon wrote:
> If a stage-2 page-table contains an executable, read-only mapping at the
> pte level (e.g. due to dirty logging being enabled), a subsequent write
> fault to the same page which tries to install a larger block mapping
> (e.g. due to dirty logging having been disabled) will erroneously inherit
> the exec permission and consequently skip I-cache invalidation for the
> rest of the block.
> [...]

Applied to kvm-arm64/fixes-5.8-3, thanks!

[1/1] KVM: arm64: Don't inherit exec permission across page-table levels
      commit: b757b47a2fcba584d4a32fd7ee68faca510ab96f


Without deviation from the norm, progress is not possible.

kvmarm mailing list

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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-23 10:17 Will Deacon
2020-07-23 17:09 ` Sasha Levin
2020-07-28  9:37 ` Marc Zyngier [this message]

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