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[35.185.214.157]) by smtp.gmail.com with ESMTPSA id z4sm4946183pfh.15.2021.12.08.16.04.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Dec 2021 16:04:44 -0800 (PST) Date: Thu, 9 Dec 2021 00:04:41 +0000 To: Maxim Levitsky Subject: Re: [PATCH v3 00/26] KVM: x86: Halt and APICv overhaul Message-ID: References: <20211208015236.1616697-1-seanjc@google.com> <39c885fc6455dd0aa2f8643e725422851430f9ec.camel@redhat.com> <8c6c38f3cc201e42629c3b8e5cf8cdb251c9ea8d.camel@redhat.com> <6f0dc26c78c151814317d95d4918ffddabdd2df1.camel@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <6f0dc26c78c151814317d95d4918ffddabdd2df1.camel@redhat.com> Cc: Wanpeng Li , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Paolo Bonzini , Vitaly Kuznetsov , Jim Mattson X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Sean Christopherson via iommu Reply-To: Sean Christopherson Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" 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. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu