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From: Maxim Levitsky <mlevitsk@redhat.com>
To: Sean Christopherson <seanjc@google.com>
Cc: Wanpeng Li <wanpengli@tencent.com>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux-foundation.org,
	Paolo Bonzini <pbonzini@redhat.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Jim Mattson <jmattson@google.com>
Subject: Re: [PATCH v3 00/26] KVM: x86: Halt and APICv overhaul
Date: Thu, 09 Dec 2021 08:36:44 +0200	[thread overview]
Message-ID: <e87ba370fd853452e763cf36c1cf94fa251185de.camel@redhat.com> (raw)
In-Reply-To: <YbFIGSeukbquyoQ5@google.com>

On Thu, 2021-12-09 at 00:04 +0000, Sean Christopherson wrote:
> On Thu, Dec 09, 2021, Maxim Levitsky wrote:
> > Host crash while running 32 bit VM and another 32 bit VM nested in it:
> > 
> > [  751.182290] BUG: kernel NULL pointer dereference, address: 0000000000000025
> > [  751.198234] #PF: supervisor read access in kernel mode
> > [  751.209982] #PF: error_code(0x0000) - not-present page
> > [  751.221733] PGD 3720f9067 P4D 3720f9067 PUD 3720f8067 PMD 0 
> > [  751.234682] Oops: 0000 [#1] SMP
> > [  751.241857] CPU: 8 PID: 54050 Comm: CPU 8/KVM Tainted: G           O      5.16.0-rc4.unstable #6
> > [  751.261960] Hardware name: LENOVO 20UF001CUS/20UF001CUS, BIOS R1CET65W(1.34 ) 06/17/2021
> > [  751.280475] RIP: 0010:is_page_fault_stale.isra.0+0x2a/0xa0 [kvm]
> 
> ...
> 
> > Oh well, not related to the patch series but just that I don't forget.
> > I need to do some throughfull testing on all the VMs I use.
> 
> This is my goof, I'll post a fix shortly.
> 
Thanks!

Best regards,
	Maxim Levitsky

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  reply	other threads:[~2021-12-09  6:36 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-08  1:52 [PATCH v3 00/26] KVM: x86: Halt and APICv overhaul Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 01/26] KVM: fix avic_set_running for preemptable kernels Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 02/26] KVM: nVMX: Ensure vCPU honors event request if posting nested IRQ fails Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 03/26] KVM: VMX: Clean up PI pre/post-block WARNs Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 04/26] KVM: VMX: Handle PI wakeup shenanigans during vcpu_put/load Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 05/26] KVM: Drop unused kvm_vcpu.pre_pcpu field Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 06/26] KVM: Move x86 VMX's posted interrupt list_head to vcpu_vmx Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 07/26] KVM: VMX: Move preemption timer <=> hrtimer dance to common x86 Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 08/26] KVM: x86: Unexport LAPIC's switch_to_{hv, sw}_timer() helpers Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 09/26] KVM: x86: Remove defunct pre_block/post_block kvm_x86_ops hooks Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 10/26] KVM: SVM: Signal AVIC doorbell iff vCPU is in guest mode Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 11/26] KVM: SVM: Don't bother checking for "running" AVIC when kicking for IPIs Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 12/26] KVM: SVM: Remove unnecessary APICv/AVIC update in vCPU unblocking path Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 13/26] KVM: SVM: Use kvm_vcpu_is_blocking() in AVIC load to handle preemption Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 14/26] KVM: SVM: Skip AVIC and IRTE updates when loading blocking vCPU Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 15/26] iommu/amd: KVM: SVM: Use pCPU to infer IsRun state for IRTE Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 16/26] KVM: VMX: Don't do full kick when triggering posted interrupt "fails" Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 17/26] KVM: VMX: Wake vCPU when delivering posted IRQ even if vCPU == this vCPU Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 18/26] KVM: VMX: Pass desired vector instead of bool for triggering posted IRQ Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 19/26] KVM: VMX: Fold fallback path into triggering posted IRQ helper Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 20/26] KVM: VMX: Don't do full kick when handling posted interrupt wakeup Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 21/26] KVM: SVM: Drop AVIC's intermediate avic_set_running() helper Sean Christopherson via iommu
2021-12-08 14:43   ` Paolo Bonzini
2021-12-08 15:03     ` Maxim Levitsky
2021-12-08 15:43     ` Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 22/26] KVM: SVM: Move svm_hardware_setup() and its helpers below svm_x86_ops Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 23/26] KVM: SVM: Nullify vcpu_(un)blocking() hooks if AVIC is disabled Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 24/26] KVM: x86: Skip APICv update if APICv is disable at the module level Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 25/26] KVM: x86: Drop NULL check on kvm_x86_ops.check_apicv_inhibit_reasons Sean Christopherson via iommu
2021-12-08  1:52 ` [PATCH v3 26/26] KVM: x86: Unexport __kvm_request_apicv_update() Sean Christopherson via iommu
2021-12-08  9:04 ` [PATCH v3 00/26] KVM: x86: Halt and APICv overhaul Paolo Bonzini
2021-12-08 14:51 ` Paolo Bonzini
2021-12-08 23:00 ` Maxim Levitsky
2021-12-08 23:16   ` Maxim Levitsky
2021-12-08 23:34     ` Maxim Levitsky
2021-12-09  0:04       ` Sean Christopherson via iommu
2021-12-09  6:36         ` Maxim Levitsky [this message]
2021-12-09  0:02     ` Sean Christopherson via iommu
2021-12-09 14:29       ` Paolo Bonzini
2021-12-09 14:48         ` Maxim Levitsky
2021-12-09 15:45           ` Sean Christopherson via iommu
2021-12-09 16:03             ` Maxim Levitsky
2021-12-09  1:37     ` Sean Christopherson via iommu
2021-12-09  6:31       ` Maxim Levitsky
2021-12-08 23:43   ` Sean Christopherson via iommu
2021-12-09  6:34     ` Maxim Levitsky

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