linux-kernel - Re: [PATCH RESEND v4 00/23] SMM emulation and interrupt shadow fixes

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: <b0e8da09162cc6f2194e445a6e566f1bc356d5d0.camel@redhat.com>
Date:   Thu, 27 Oct 2022 20:06:00 +0300
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Yang Zhong <yang.zhong@...el.com>, x86@...nel.org,
        Jim Mattson <jmattson@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Shuah Khan <shuah@...nel.org>,
        Guang Zeng <guang.zeng@...el.com>,
        Joerg Roedel <joro@...tes.org>, linux-kernel@...r.kernel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>,
        linux-kselftest@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        "H. Peter Anvin" <hpa@...or.com>, Wei Wang <wei.w.wang@...el.com>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH RESEND v4 00/23] SMM emulation and interrupt shadow fixes

On Thu, 2022-10-27 at 18:49 +0200, Paolo Bonzini wrote:
> On 10/25/22 14:47, Maxim Levitsky wrote:
> > This patch series is a result of long debug work to find out why
> > sometimes guests with win11 secure boot
> > were failing during boot.
> > 
> > During writing a unit test I found another bug, turns out
> > that on rsm emulation, if the rsm instruction was done in real
> > or 32 bit mode, KVM would truncate the restored RIP to 32 bit.
> > 
> > I also refactored the way we write SMRAM so it is easier
> > now to understand what is going on.
> > 
> > The main bug in this series which I fixed is that we
> > allowed #SMI to happen during the STI interrupt shadow,
> > and we did nothing to both reset it on #SMI handler
> > entry and restore it on RSM.
> 
> I have now sent out the final/new version of the first 8 patches and 
> will review these tomorrow.  Thanks for your patience. :)
> 
> Paolo
> 
Thank you very much!!


Best regards,
	Maxim Levitsky