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Subject: Re: [PATCH stable-4.19 1/2] KVM: nVMX: do not use dangling shadow
 VMCS after guest reset
To:     Jack Wang <jack.wang.usish@gmail.com>,
        Sasha Levin <sashal@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Vitaly Kuznetsov <vkuznets@redhat.com>, stable@vger.kernel.org,
        kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
        =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>
References: <20190725104645.30642-1-vkuznets@redhat.com>
 <20190725104645.30642-2-vkuznets@redhat.com>
 <CA+res+RfqpT=g1QbCqr3OkHVzFFSAt3cfCYNcwqiemWmOifFxg@mail.gmail.com>
 <2ea5d588-8573-6653-b848-0b06d1f98310@redhat.com>
 <CA+res+ShqmPcJWj+0F7X8=0DM_ys8HCP+rjg4Nv-7o06EipJQw@mail.gmail.com>
From:   Paolo Bonzini <pbonzini@redhat.com>
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Date:   Mon, 29 Jul 2019 11:30:19 +0200
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On 29/07/19 11:29, Jack Wang wrote:
> Thanks Paolo for confirmation. I'm asking because we had one incident
> in our production with 4.14.129 kernel,
> System is Skylake Gold cpu, first kvm errors, host hung afterwards
> 
> kernel: [1186161.091160] kvm: vmptrld           (null)/6bfc00000000 failed
> kernel: [1186161.091537] kvm: vmclear fail:           (null)/6bfc00000000
> kernel: [1186186.490300] watchdog: BUG: soft lockup - CPU#54 stuck for
> 23s! [qemu:16639]
> 
> Hi Sasha, hi Greg,
> 
> Would be great if you can pick this patch also to 4.14 kernel.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>