Date: Thu, 8 Nov 2018 21:25:37 +0100 From: Paolo Bonzini <pbonzini@...hat.com> To: Ahmed Abd El Mawgood <ahmedsoliman0x666@...il.com>, rkrcmar@...hat.com, Jonathan Corbet <corbet@....net>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, hpa@...or.com, x86@...nel.org, kvm@...r.kernel.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, ovich00@...il.com, kernel-hardening@...ts.openwall.com, nigel.edwards@....com, Boris Lukashev <blukashev@...pervictus.com>, Hossam Hassan <7ossam9063@...il.com>, "Ahmed Lotfy igor . stoppa @ gmail . com" <A7med.lotfey@...il.com> Subject: Re: [PATCH V6 0/8] KVM: X86: Introducing ROE Protection Kernel Hardening On 04/11/2018 18:11, Ahmed Abd El Mawgood wrote: > Our model assumes that an attacker got full root access to a running guest and > his goal is to manipulate kernel code/data (hook syscalls, overwrite IDT ..etc). > > There is future work in progress to also put some sort of protection on the page > table register CR3 and other critical registers that can be intercepted by KVM. > This way it won't be possible for an attacker to manipulate any part of the > guests page table. > Do you have patches that enable usage of ROE in the kernel? Alternatively you can write testcases in tools/testing/selftests/kvm to test how guests should use it. I would remove CONFIG_KVM_ROE altogether. You can enable it unconditionally. I will continue reviewing the patches soon. Paolo
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