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 E42A9C433F5 for ; Wed, 24 Nov 2021 11:25:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241242AbhKXL2s (ORCPT ); Wed, 24 Nov 2021 06:28:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36068 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240520AbhKXL2p (ORCPT ); Wed, 24 Nov 2021 06:28:45 -0500 Received: from mail-ed1-x535.google.com (mail-ed1-x535.google.com [IPv6:2a00:1450:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0493CC061574; Wed, 24 Nov 2021 03:25:36 -0800 (PST) Received: by mail-ed1-x535.google.com with SMTP id w1so8833551edc.6; Wed, 24 Nov 2021 03:25:35 -0800 (PST) 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=b1buRXU5rD4SSQpdIa6kX0zDvHTz7Su/CMQ01HSJ/QQ=; b=WspF/9buN8DfGHB/qbiMSS4Z9GgtaM7WBmUkdksRp9IAY+2payLQOiKFag4xc0BBml +eBLZ9vXT1iCkMukr9pgWiXRpNUewu+cAjnNJijIFLthEaK9E6COigvIpmnBXYOLrBUT jj2VpSGQkSIoM0+5SO0aTNZzd4flX5BJltBiJzkMsz8ozv4OmjvP/EBpRW/NgKfHmvRL KwV4hqhu+mPujPYse5+EdzwXoPLWN2Jby9xX8ege8E5dn9fzpwYPJuBxz1QYTN7L4UFN rElXBxtisvzzKQQKunNCpE71vdXJ8suio6v6XHi9kHWC5RLxiHk+wcKMBUHPpcUxFQjM ZjXQ== 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=b1buRXU5rD4SSQpdIa6kX0zDvHTz7Su/CMQ01HSJ/QQ=; b=ykubxQSKrvZ0DdU62oO0hgqV8DffxtK+D32MJSFxkhVtWTWeGdGVmCf9zVAEIlie4M f8aqwBMiKlO08LqKipfd+uYfa+dzSR81sb7jokwTlJSV6MkyxcyMqIP0OyBXyXGe0Lnn uMR4HisVjUBPBN0RXjcoZmCBLGTc3Mre1+LUQ2j4TnKwoViTOinVPqqAYCjI/VzOYHCJ FLLEQIyPV+NyU3UqMPb9Sbi5DvBlJiPUAz8nM1Hk4C/ftI47fRc6ZiWU6BuWkpleFrds 5R0FXgkMqshy0wXl7GxsNYCto7kYYykXtu3pUF2dE2YmSivrjKNbJQI8L++IRItXj/Rw DDcw== X-Gm-Message-State: AOAM530jCQRlC6Ufa9tuG4QD0Pjs6w6Z5ELjgawAbJRuwItL6mV5JHlh uU4mGossjt2r36NENJ67Bps= X-Google-Smtp-Source: ABdhPJyMVsqNRPRfoXuQen30v4VRDKIKDTG18STn9WOHrkikIkfB5sjbz+N24ZEO7tdKl3LD9rOGqA== X-Received: by 2002:a05:6402:147:: with SMTP id s7mr23607229edu.8.1637753134519; Wed, 24 Nov 2021 03:25:34 -0800 (PST) Received: from ?IPV6:2001:b07:6468:f312:5e2c:eb9a:a8b6:fd3e? ([2001:b07:6468:f312:5e2c:eb9a:a8b6:fd3e]) by smtp.googlemail.com with ESMTPSA id cw5sm7020871ejc.74.2021.11.24.03.25.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Nov 2021 03:25:34 -0800 (PST) Sender: Paolo Bonzini Message-ID: <1b1729ec-f94e-98ac-e76c-bad1c76467c7@redhat.com> Date: Wed, 24 Nov 2021 12:25:32 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [syzbot] kernel BUG in kvm_read_guest_offset_cached Content-Language: en-US To: Vitaly Kuznetsov , David Woodhouse Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, syzbot , syzkaller-bugs@googlegroups.com, Sean Christopherson References: <000000000000f854ec05d167f227@google.com> <871r35n6nh.fsf@redhat.com> From: Paolo Bonzini In-Reply-To: <871r35n6nh.fsf@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/24/21 12:18, Vitaly Kuznetsov wrote: >> >> syzbot found the following issue on: >> >> HEAD commit: 4c388a8e740d Merge tag 'zstd-for-linus-5.16-rc1' of git://.. >> git tree: upstream >> console output:https://syzkaller.appspot.com/x/log.txt?x=171ff6eeb00000 >> kernel config:https://syzkaller.appspot.com/x/.config?x=6d3b8fd1977c1e73 >> dashboard link:https://syzkaller.appspot.com/bug?extid=7b7db8bb4db6fd5e157b >> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 >> >> Unfortunately, I don't have any reproducer for this issue yet. > No worries, I think I do. > FWIW I have already posted a patch. Thanks for the reproducer though! Paolo