From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A912C433F5 for ; Thu, 9 Dec 2021 00:04:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241323AbhLIAIT (ORCPT ); Wed, 8 Dec 2021 19:08:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241304AbhLIAIS (ORCPT ); Wed, 8 Dec 2021 19:08:18 -0500 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0A8AC0617A1 for ; Wed, 8 Dec 2021 16:04:45 -0800 (PST) Received: by mail-pj1-x102b.google.com with SMTP id k6-20020a17090a7f0600b001ad9d73b20bso3439066pjl.3 for ; Wed, 08 Dec 2021 16:04:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=MjUeHzzA4V17niQyufwkdrBEp0f65mLMF1fq0crIpW0=; b=b+3DMK2d5mC+XSKmwavtEEUhdxeN1Sx6VF8/i5xEOkF77+HhxFlS7HOatJxHNY6/nb PJfVeM/FZc53xg2Gm0RZKK3pjNka3g8c/tYglsPigPaiobRgBBAPlGbUvxoHlsHCHiUc YehYKmEOkc5137JM/L8YYXEfZTttkn66sk9+26uVrXO6Efykk+1T5nWhC7z4ZoGxT5zY qfP3qKjUB45LJk3MFpQvmhN2An5vk5coeZt786iJr9cey0YWSe2SZw3NC+Tjk7qc+S/P nBgfKZ2T3uD1CJW9x1r5EhNEYNtGIDrpOIuLhWfyb8yBYCpN0gd+nvxAsJloYZ9tf3QQ ZGiQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=MjUeHzzA4V17niQyufwkdrBEp0f65mLMF1fq0crIpW0=; b=oOUxk+ORmrgeqPwZx0Ak+Pa02KabEmgADs7z8ZgwPJZ5E4radb/vvvGUgeVGnc/mkm /t7o5FulrQJvLfsqtVW34uq0FKm9Lf1vXdm1rfHIk8IsYlh+HBadWksu/nOHFGKGqEN9 cGk+d6lD3YetOXHbA+wPA3TGIQRLhsQxd7pAKBTjUiE+7RCD/tLF+fkszfSNyWEFVHTc ggtjfXPWKG3y3n4r4UmdGTOe05/jcAHy64tRviVBgy864h3WpdP4OD9PCscgbzboNAz6 aytOvahOWyAK0ouVoRZebxEcbEqLzAS/ehqa9NgFn/VwoeQnmRkT1Oxqz4Svv3CVvOnz lRfg== X-Gm-Message-State: AOAM53370Swzp7Udz/rOAbO3EEL3FUc6At3xhFppesl/BfpyWNB77qR6 hwzc/MknlIEFRZpG5xTAz3d4LQ== X-Google-Smtp-Source: ABdhPJyiv63F9ZJKJny3hjVwxro5UZyYEhLuM/dB7Sc4H0wX9hjkGjpGw/qXP8w5pVdLRhJLyjjXmQ== X-Received: by 2002:a17:90b:1b0a:: with SMTP id nu10mr11290342pjb.35.1639008285121; Wed, 08 Dec 2021 16:04:45 -0800 (PST) Received: from google.com (157.214.185.35.bc.googleusercontent.com. [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 From: Sean Christopherson To: Maxim Levitsky Cc: Paolo Bonzini , Joerg Roedel , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Suravee Suthikulpanit , kvm@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org 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-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6f0dc26c78c151814317d95d4918ffddabdd2df1.camel@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.