From: Marc Zyngier <maz@kernel.org>
To: Oliver Upton <oliver.upton@linux.dev>,
Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Quentin Perret <qperret@google.com>
Cc: Keir Fraser <keirf@google.com>,
Ben Simner <ben.simner@cl.cam.ac.uk>,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] KVM: arm64: Fix alignment of kvm_hyp_memcache allocations
Date: Thu, 13 Feb 2025 18:02:35 +0000 [thread overview]
Message-ID: <173946974570.2974684.11799250388121421778.b4-ty@kernel.org> (raw)
In-Reply-To: <20250213153615.3642515-1-qperret@google.com>
On Thu, 13 Feb 2025 15:36:14 +0000, Quentin Perret wrote:
> When allocating guest stage-2 page-table pages at EL2, pKVM can consume
> pages from the host-provided kvm_hyp_memcache. As pgtable.c expects
> zeroed pages, guest_s2_zalloc_page() actively implements this zeroing
> with a PAGE_SIZE memset. Unfortunately, we don't check the page
> alignment of the host-provided address before doing so, which could
> lead to the memset overrunning the page if the host was malicious.
>
> [...]
Applied to fixes, thanks!
[1/1] KVM: arm64: Fix alignment of kvm_hyp_memcache allocations
commit: b938731ed2d4eea8e268a27bfc600581fedae2a9
Cheers,
M.
--
Without deviation from the norm, progress is not possible.
prev parent reply other threads:[~2025-02-13 18:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-13 15:36 Quentin Perret
2025-02-13 18:02 ` Marc Zyngier [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=173946974570.2974684.11799250388121421778.b4-ty@kernel.org \
--to=maz@kernel.org \
--cc=ben.simner@cl.cam.ac.uk \
--cc=catalin.marinas@arm.com \
--cc=joey.gouly@arm.com \
--cc=keirf@google.com \
--cc=kvmarm@lists.linux.dev \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=oliver.upton@linux.dev \
--cc=qperret@google.com \
--cc=suzuki.poulose@arm.com \
--cc=will@kernel.org \
--cc=yuzenghui@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®