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 C0A8AC71133 for ; Fri, 25 Aug 2023 19:03:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230146AbjHYTCe (ORCPT ); Fri, 25 Aug 2023 15:02:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230093AbjHYTCA (ORCPT ); Fri, 25 Aug 2023 15:02:00 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 028A72126 for ; Fri, 25 Aug 2023 12:01:59 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-d77bd411d7eso1559059276.3 for ; Fri, 25 Aug 2023 12:01:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1692990118; x=1693594918; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=yB25VmLsZ05XCxrScAEBUUZ2TzeRvANuVQ5uvbtI2cs=; b=JmV2U2qMmNMZxe94Ua1X2AkpJCVskBqzdJe8fc5fkmPKf8h+oTXK7NMe+EaOWZlifM S9z2ssAg1mJzovGTe1x4TiConlEGEBw/D3JzthnxvrV6WwWuZCe+oHuDl1jaGA0LVm8z yJE4lQWQCNYVMHWqBc5dz4YNExv12tE/+2gtRu9RWc0WrXzqUV1XVyLeY47aqcH9mx4n kwFI5qu5uaRvjdXsTSS67CaQtT+Ch7o91SlndOJpYtz1b7tnr6Kk5QE4b9cgP71ondLa Y4lo+GpNTKs8BAKb53aWGWozgydoAIJYaTcrhversHA3JhOEW0AzWIHa4JLG2rZvwS9N V1iA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692990118; x=1693594918; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=yB25VmLsZ05XCxrScAEBUUZ2TzeRvANuVQ5uvbtI2cs=; b=cDqpU6HV2IRJK9OC9Ko3aMYHZ8QxxUbsnBUqISmIUsqyA9GbBIUST1HCtZzP+VG0Mx YIPwJP4vLrlTKY1s0VCEeh/1kyO4ckLLBcRx+JDeHbxX7JggrqL3MOQuwxLpgDjDTqpW 0EI2HBG5h42KzmtYoq58rSBIQSWXiJDUyl0gKPIxL3mDHHPMxw53naHAL/vryofh0dI1 5wH1JlmAx5sunmVL2eg5sP587/XUpznIUOGaJZA9PGzRywgLnKqJuygc6gSkui8tMdWC zmmiSgkDSVjr3g1k9qfH19tOo0J10dTtHRQ4SubCuHAX3zdKrFhXVzeSQzsMsQV6+Hgz OZOg== X-Gm-Message-State: AOJu0YzGKCVF0BNprNTSyGg6Iw99C02gQsSbpnwYeZ1Tnp8rAUhlYCH/ AHD5XQSafQh3BuJXNNbUYnPxP1JY/VQ= X-Google-Smtp-Source: AGHT+IHKz4maR/Ue5JgIvKQgfAheQjp7Anr9d18U6qw5jkQVZoJRmhdsuyzq3d++9C63AVpT28uWvnkQKRg= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6902:108f:b0:d7a:bf7d:bc0f with SMTP id v15-20020a056902108f00b00d7abf7dbc0fmr18959ybu.3.1692990118310; Fri, 25 Aug 2023 12:01:58 -0700 (PDT) Date: Fri, 25 Aug 2023 12:01:42 -0700 In-Reply-To: <20230817233430.1416463-1-seanjc@google.com> Mime-Version: 1.0 References: <20230817233430.1416463-1-seanjc@google.com> X-Mailer: git-send-email 2.42.0.rc2.253.gd59a3bf2b4-goog Message-ID: <169297947911.2871633.4127274459666234045.b4-ty@google.com> Subject: Re: [PATCH 0/2] KVM: selftests: Fix sync_regs race tests on AMD From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Michal Luczaj Content-Type: text/plain; charset="utf-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 17 Aug 2023 16:34:28 -0700, Sean Christopherson wrote: > The recently introduced sync_regs subtests to detect TOCTOU bugs hang on > AMD because KVM synthesizes INIT on triple fault shutdown (because AMD says > the VMCB is undefined after shutdown). Fix it by loading known good state > if a shutdown occurs. > > Patch two explicitly injects #UD as the "good" vector so that the test > doesn't rely on KVM inadvertantly setting the vector to #DE (old, buggy > behavior). > > [...] Applied to kvm-x86 selftests. [1/2] KVM: selftests: Reload "good" vCPU state if vCPU hits shutdown https://github.com/kvm-x86/linux/commit/5002b112a5ad [2/2] KVM: selftests: Explicit set #UD when *potentially* injecting exception https://github.com/kvm-x86/linux/commit/02dc2543e379 -- https://github.com/kvm-x86/linux/tree/next https://github.com/kvm-x86/linux/tree/fixes