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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA508C433F5 for ; Fri, 1 Oct 2021 15:13:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CFBC161A56 for ; Fri, 1 Oct 2021 15:13:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354938AbhJAPPE (ORCPT ); Fri, 1 Oct 2021 11:15:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36334 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354865AbhJAPPD (ORCPT ); Fri, 1 Oct 2021 11:15:03 -0400 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D2AEC06177D for ; Fri, 1 Oct 2021 08:13:19 -0700 (PDT) Received: by mail-pj1-x1029.google.com with SMTP id k23-20020a17090a591700b001976d2db364so7420458pji.2 for ; Fri, 01 Oct 2021 08:13:19 -0700 (PDT) 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=epqGvL2xwASJxQVBW1Iu4NCeLliUpYCfDqhNCQQ6Qu4=; b=RmL9twmGl1cux62in5hgYRWjsjWQRTNuCw+2HHC11ZPLnWbcNtrkeKO6qsTnVf+AQI VOHQZCPXkfGqGtl5egoUHs0ILgIe2nryR/iHwonKaQCQvp4wXQ7b5dGcNp6j8Hc7F2p5 lF2wIk+KpQaBVIFo4HvybjQ5oAjVigRE6s2a7on8nAjU5NSqQ7ZxFvqeBgiw6FqjLH7Q Tm2VM9gpKyNNiHlUPe7GanCql6KYPqZp3w3N+wwbu/Im+t270KnjjhVY8SUrLdKcoaaK dk7IGEx9L9po679KQv6O2726NPU3pcl0iQmZGhHy9TcM9+xBtxeRPDelGVQqPTkJHoQT D2JQ== 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=epqGvL2xwASJxQVBW1Iu4NCeLliUpYCfDqhNCQQ6Qu4=; b=I62UNNovaTEFIGu1gcd9fmeqa41nSi+19omTsJZTTe9b0crGjno/f0QwFV04UOV23K EricZrCjFgKQYzErwFpJRgNpyP6syx5452yWmvbWteMRk+cmJtRIgVwmgAATWacwHmza 8c+GoFnGYp+83G/ggS87n0qLygfqe0SqUpc2DKwFo97JPGJRnDpGIj7vFncx+EnVtv33 ZBVAi1aGhLPWdgW2OGw85dbpDQaokmZfPpMb5sEpwx8WakCQRNm5czRJvXUWILlicxKB 6AnzHEAruoaoP2UUmzkesWAF8sQ4OCBmlEpokupFyTuR4LgMRyLFnon5GELR1Y9s2JAw jiVA== X-Gm-Message-State: AOAM533uNv7AI3YFAd2E42H0PXOQLPtSw60qjUY4sY8ALiB+sZEcMZjp wcW58rkyDNfTBGDmGkPikkJAhw== X-Google-Smtp-Source: ABdhPJwayzCtSnysz+R4jnKXc7dOdpaqRQaloWu6UZiyZVUaDl75+fhEkUoWnJ6S2FZUlI8UcciF6Q== X-Received: by 2002:a17:902:aa91:b0:13e:292f:266a with SMTP id d17-20020a170902aa9100b0013e292f266amr10000865plr.10.1633101198760; Fri, 01 Oct 2021 08:13:18 -0700 (PDT) Received: from google.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id v2sm5991593pje.15.2021.10.01.08.13.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Oct 2021 08:13:18 -0700 (PDT) Date: Fri, 1 Oct 2021 15:13:14 +0000 From: Sean Christopherson To: syzbot Cc: bp@alien8.de, dave.hansen@linux.intel.com, glider@google.com, hpa@zytor.com, jarkko@kernel.org, jmattson@google.com, joro@8bytes.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org, mingo@redhat.com, pbonzini@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, vkuznets@redhat.com, wanpengli@tencent.com, x86@kernel.org Subject: Re: [syzbot] KMSAN: uninit-value in kvm_cpuid Message-ID: References: <00000000000048342f05cd44efc0@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000000000048342f05cd44efc0@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 30, 2021, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: cd2c05533838 DO-NOT-SUBMIT: kmsan: suppress a report in ke.. > git tree: https://github.com/google/kmsan.git master > console output: https://syzkaller.appspot.com/x/log.txt?x=11373b17300000 > kernel config: https://syzkaller.appspot.com/x/.config?x=978f1b2d7a5aad3e > dashboard link: https://syzkaller.appspot.com/bug?extid=d6d011bc17bb751d4aa2 > compiler: clang version 14.0.0 (git@github.com:llvm/llvm-project.git 0996585c8e3b3d409494eb5f1cad714b9e1f7fb5), GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14b6c4cb300000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10fdb00f300000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+d6d011bc17bb751d4aa2@syzkaller.appspotmail.com #syz fix: KVM: x86: Swap order of CPUID entry "index" vs. "significant flag" checks