linux-kernel - Re: [RFC PATCH] KVM: x86: Fix APIC page invalidation race

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <09bc7ef5-445f-b2df-aa55-a23710ecc481@redhat.com>
Date:   Fri, 19 Jun 2020 14:12:16 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Xinlong Lin <linxl3@...gsu.com>,
        Eiichi Tsukata <eiichi.tsukata@...anix.com>
Cc:     "sean.j.christopherson" <sean.j.christopherson@...el.com>,
        vkuznets <vkuznets@...hat.com>,
        wanpengli <wanpengli@...cent.com>,
        jmattson <jmattson@...gle.com>, joro <joro@...tes.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>, "x86@...nel.org" <x86@...nel.org>,
        "hpa@...or.com" <hpa@...or.com>, kvm <kvm@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Felipe Franciosi <felipe@...anix.com>,
        "rkrcmar@...hat.com" <rkrcmar@...hat.com>,
        Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [RFC PATCH] KVM: x86: Fix APIC page invalidation race

On 19/06/20 07:17, Xinlong Lin wrote:
>>     Because of the above race, there can be a mismatch between the
>>     host physical address stored in the APIC_ACCESS_PAGE VMCS field and
>>     the host physical address stored in the EPT entry for the APIC GPA
>>     (0xfee0000).  When this happens, the processor will not trap APIC 
> 
> Is the APIC GPA shoud be 0xfee00000?

Yes, there's a missing zero.

Paolo