From: Sean Christopherson <seanjc@google.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Thomas Lendacky <thomas.lendacky@amd.com>,
Michael Roth <michael.roth@amd.com>
Subject: Re: [PATCH v2] KVM: SEV: Reject non-positive effective lengths during LAUNCH_UPDATE
Date: Wed, 24 Sep 2025 11:07:41 -0700 [thread overview]
Message-ID: <175873636645.2146220.17008570618264199146.b4-ty@google.com> (raw)
In-Reply-To: <20250919211649.1575654-1-seanjc@google.com>
On Fri, 19 Sep 2025 14:16:49 -0700, Sean Christopherson wrote:
> Check for an invalid length during LAUNCH_UPDATE at the start of
> snp_launch_update() instead of subtly relying on kvm_gmem_populate() to
> detect the bad state. Code that directly handles userspace input
> absolutely should sanitize those inputs; failure to do so is asking for
> bugs where KVM consumes an invalid "npages".
>
> Keep the check in gmem, but wrap it in a WARN to flag any bad usage by
> the caller.
>
> [...]
Applied to kvm-x86 svm, thanks!
[1/1] KVM: SEV: Reject non-positive effective lengths during LAUNCH_UPDATE
https://github.com/kvm-x86/linux/commit/5b66e335ead6
--
https://github.com/kvm-x86/linux/tree/next
prev parent reply other threads:[~2025-09-24 18:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-19 21:16 Sean Christopherson
2025-09-20 17:21 ` Tom Lendacky
2025-09-24 18:07 ` Sean Christopherson [this message]
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