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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 56571C433F5 for ; Wed, 13 Apr 2022 20:12:38 +0000 (UTC) Received: from localhost ([::1]:49870 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nejLx-0005jX-0F for qemu-devel@archiver.kernel.org; Wed, 13 Apr 2022 16:12:37 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55656) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nejLG-00050v-7O for qemu-devel@nongnu.org; Wed, 13 Apr 2022 16:11:54 -0400 Received: from mail-wm1-x330.google.com ([2a00:1450:4864:20::330]:36370) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nejLE-0004aJ-1f for qemu-devel@nongnu.org; Wed, 13 Apr 2022 16:11:53 -0400 Received: by mail-wm1-x330.google.com with SMTP id u17-20020a05600c211100b0038eaf4cdaaeso4712162wml.1 for ; Wed, 13 Apr 2022 13:11:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=2ytjWz+ns5HcKCFXi4O08T5hk7runitNKImZqB6yrNU=; b=aNKCE4CrNS2J2SutevTLXa+NcqPZ67h09TuxytkmGdVGSu4wFPiJCutvdrMb/2NcnX PH6KGpzYSq+l/HISqDxcloG1pWOHIMuHyGQL6xqj7z+5iAR8WtHguUbA5EjzC3dsaRXP NI4XWTYOrpaVXT0nBqTkuBGtZ88kNC3xPxQA2H193lagbbbSdEKukzhm+EgWvd/F+qHM +tAb9Be5FaCrs/8srCsetqRV6dDyaqWqyN5fSpnJ8Jb6TN+teo8Ea7SgixBdTWqmhlfk E7QgskCfyYkDxpJOY+Y1n/Qz5lrLXPjJn+yh9BNR3tKa1PU+FYgEVZS4xXkakuEXSO8N Kf9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:message-id:date:mime-version:user-agent :subject:content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=2ytjWz+ns5HcKCFXi4O08T5hk7runitNKImZqB6yrNU=; b=7ggFDVGNq7sMVggKKp7MhFIAqJo2+69fJIY27UqqW/hVwW+C19CHpUEDbc0mvn123t 7qUelBOnPGfCyfA7t4xqillJWN3fE5VV3ihZOM0Zwa/cVBfR/CqedWIVbETWgjAkP9w4 y5uaWlQ1HWxxO5yznhzDna9VMd2fe7S7/URnFvQBGVrNMvO4IUqDQ5lvNWrnR7X/JlyI 96vdekRq+1b7Rqa7Q9s+agxHLHGbs6n/nhM+dYtbN7prDss2IVTmZAyGLiEiUpavDoXs sPsxvoB+KYrly6mUIkYP/TotW6wBxGw0SrROCFulqsHxjDEqJ6eOWGe6BaQkaLwurjZD 5XLw== X-Gm-Message-State: AOAM531eNCgfgBZH/IdxVSIcBLJTVclERuMVJNxiC8OWfe98WcYPLMwR V0t9tF5tAKzNFZr32ssqWFIQjbKM8qkBRA== X-Google-Smtp-Source: ABdhPJw8CZi3IoExkeJdO1dAZKnKIeXlKUPbQOQ+YlolQqmBY8mYDkqcElJWIruI1mjByWRRm/2zYw== X-Received: by 2002:a05:600c:4fce:b0:38d:a58:6d16 with SMTP id o14-20020a05600c4fce00b0038d0a586d16mr336756wmq.11.1649880710287; Wed, 13 Apr 2022 13:11:50 -0700 (PDT) Received: from ?IPV6:2001:b07:6468:f312:c8dd:75d4:99ab:290a? ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.googlemail.com with ESMTPSA id g1-20020a5d64e1000000b002079b871795sm12309wri.50.2022.04.13.13.11.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 13 Apr 2022 13:11:49 -0700 (PDT) Message-ID: Date: Wed, 13 Apr 2022 22:11:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [PATCH] target/i386: do not access beyond the low 128 bits of SSE registers Content-Language: en-US To: =?UTF-8?Q?Alex_Benn=c3=a9e?= References: <20220413160945.544176-1-pbonzini@redhat.com> <875yncygac.fsf@linaro.org> From: Paolo Bonzini In-Reply-To: <875yncygac.fsf@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::330; envelope-from=paolo.bonzini@gmail.com; helo=mail-wm1-x330.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 4/13/22 20:44, Alex Bennée wrote: > And: > > Fixes: b7711471f5 ("target-i386: make xmm_regs 512-bit wide") > Resolves:https://gitlab.com/qemu-project/qemu/-/issues/420 It's not really a bug, beyond the possibility of uninitialized data in the migration stream. The reporter was probably using a fork of QEMU. Paolo