linux-kernel - Re: [PATCH v3 00/12] KVM: SVM: Fix soft int/ex re-injection

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: <YnF46K33TOKqpAUs@google.com>
Date:   Tue, 3 May 2022 18:48:08 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Maxim Levitsky <mlevitsk@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 00/12] KVM: SVM: Fix soft int/ex re-injection

On Mon, May 02, 2022, Maciej S. Szmigiero wrote:
> From: "Maciej S. Szmigiero" <maciej.szmigiero@...cle.com>
> 
> This series is an updated version of Sean's SVM soft interrupt/exception
> re-injection fixes patch set, which in turn extended and generalized my
> nSVM L1 -> L2 event injection fixes series.
> 
> Detailed list of changes in this version:
> * "Downgraded" the commit affecting !nrips CPUs to just drop nested SVM
> support for such parts instead of SVM support in general,
> 
> * Removed the BUG_ON() from svm_inject_irq() completely, instead of
> replacing it with WARN() - Maxim has pointed out it can still be triggered
> by userspace via KVM_SET_VCPU_EVENTS,
> 
> * Updated the new KVM self-test to switch to an alternate IDT before attempting
> a second L1 -> L2 injection to cause intervening NPF again,
> 
> * Added a fix for L1/L2 NMI state confusion during L1 -> L2 NMI re-injection,
> 
> * Updated the new KVM self-test to also check for the NMI injection
> scenario being fixed (that was found causing issues with a real guest),
> 
> * Changed "kvm_inj_virq" trace event "reinjected" field type to bool,
> 
> * Integrated the fix from patch 5 for nested_vmcb02_prepare_control() call
> argument in svm_set_nested_state() to patch 1,
> 
> * Collected Maxim's "Reviewed-by:" for tracepoint patches.
> 
> Previous versions:
> Sean's v2:
> https://lore.kernel.org/kvm/20220423021411.784383-1-seanjc@google.com
> 
> Sean's v1:
> https://lore.kernel.org/kvm/20220402010903.727604-1-seanjc@google.com
> 
> My original series:
> https://lore.kernel.org/kvm/cover.1646944472.git.maciej.szmigiero@oracle.com
> 
> Maciej S. Szmigiero (4):
>   KVM: nSVM: Sync next_rip field from vmcb12 to vmcb02
>   KVM: SVM: Don't BUG if userspace injects an interrupt with GIF=0

LOL, this should win some kind of award for most ridiculous multi-author patch :-)

Series looks good, thanks!