linux-kernel - Re: [PATCH v2 0/7] KVM: nVMX: Bug fixes and cleanup

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] [day] [month] [year] [list]

Date:   Fri, 25 Sep 2020 23:35:22 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Dan Cross <dcross@...gle.com>,
        Peter Shier <pshier@...gle.com>
Subject: Re: [PATCH v2 0/7] KVM: nVMX: Bug fixes and cleanup

On 23/09/20 20:44, Sean Christopherson wrote:
> Fix for a brutal segment caching bug that manifested as random nested
> VM-Enter failures when running with unrestricted guest disabled.  A few
> more bug fixes and cleanups for stuff found by inspection when hunting
> down the caching issue.
> 
> v2:
>   - Rebased to kvm/queue, commit e1ba1a15af73 ("KVM: SVM: Enable INVPCID
>     feature on AMD").
> 
> Sean Christopherson (7):
>   KVM: nVMX: Reset the segment cache when stuffing guest segs
>   KVM: nVMX: Reload vmcs01 if getting vmcs12's pages fails
>   KVM: nVMX: Explicitly check for valid guest state for !unrestricted
>     guest
>   KVM: nVMX: Move free_nested() below vmx_switch_vmcs()
>   KVM: nVMX: Ensure vmcs01 is the loaded VMCS when freeing nested state
>   KVM: nVMX: Drop redundant VMCS switch and free_nested() call
>   KVM: nVMX: WARN on attempt to switch the currently loaded VMCS
> 
>  arch/x86/kvm/vmx/nested.c | 103 ++++++++++++++++++++------------------
>  arch/x86/kvm/vmx/vmx.c    |   8 +--
>  arch/x86/kvm/vmx/vmx.h    |   9 ++++
>  3 files changed, 65 insertions(+), 55 deletions(-)
> 

Queued, thanks.

Paolo