linux-kernel - Re: [PATCH v6 03/33] KVM: x86: Zero out entire Hyper-V CPUID cache before processing entries

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

Message-ID: <20220905170709.dn5zp6wq5vo4cq2c@liuwe-devbox-debian-v2>
Date:   Mon, 5 Sep 2022 17:07:09 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Yuan Yao <yuan.yao@...ux.intel.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wei Liu <wei.liu@...nel.org>
Subject: Re: [PATCH v6 03/33] KVM: x86: Zero out entire Hyper-V CPUID cache
 before processing entries

On Tue, Aug 30, 2022 at 03:37:07PM +0200, Vitaly Kuznetsov wrote:
> Wipe the whole 'hv_vcpu->cpuid_cache' with memset() instead of having to
> zero each particular member when the corresponding CPUID entry was not
> found.
> 
> No functional change intended.
> 
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
> [sean: split to separate patch]
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: Wei Liu <wei.liu@...nel.org>