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 X-Spam-Level: X-Spam-Status: No, score=-6.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,NICE_REPLY_A, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 488D7C433DF for ; Sat, 22 Aug 2020 07:34:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B046208DB for ; Sat, 22 Aug 2020 07:34:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598081686; bh=uWhK2kB63bc95+/YRIP/+2rvQLcpNbxSFxJhEFldkhU=; h=Subject:To:References:From:Date:In-Reply-To:List-ID:From; b=rGJzhr9ULhrDjtMBojYsoQ6ppqwiLPs4cXoAi08Di3jr/WsakWF7Gy8HzxQPJLzVG 92vnL7noz+rcTIPakkmFfizeOUez0Ny+Z7GerKjm721r6M74I5KRygS+QbD3OBZSIJ DJnywKiASOM68MeamxskwXbN+zm7hZSIPHuDZa5A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727781AbgHVHeo (ORCPT ); Sat, 22 Aug 2020 03:34:44 -0400 Received: from mail-ej1-f49.google.com ([209.85.218.49]:44346 "EHLO mail-ej1-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727017AbgHVHen (ORCPT ); Sat, 22 Aug 2020 03:34:43 -0400 Received: by mail-ej1-f49.google.com with SMTP id bo3so5165242ejb.11 for ; Sat, 22 Aug 2020 00:34:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=v1InE3ULzicYdyVB4JrOyBrw0xip+nnOctvuAzrJ6gc=; b=CZp4+HwU46O6m7s4njZuZhdGDbXIjJjg3iX9bEeAByHEr/jZhMTWbZF1YTA4QPO2vx v7unAjydotnGhJerFTPryNMXUDSQqcjrJyfbwUiU4X9AXxXquWga0GuvzrCnz5EKTnM8 TidU3zlxVCoFVWH2BWThd4F+HZfiQyKLE4kiuoCIonU/oxHfE1dc6zW+mQf+DCztc5qw 9DKxg91YD05j+f420JEA4S5X3zU/kaVYw8zZwP65zMlK+jVqtvBxieRhh4ZeKtUWDFN2 tAl7hK056ep+1makWAqGY7XZUZZ1kW7Eq/VwW4UWjlmLZont85tt/eh1ir+4sTfjbePE vrFw== X-Gm-Message-State: AOAM530APBIFma2d2GKdQIIy2PIvQuLIENLXMqDocF9v1fNBqgEqM4OQ vtJMYKtgjQLpp3Fp78tQHYeOxiVSmtE= X-Google-Smtp-Source: ABdhPJw8Mf4cSh0+FDnh5WmV4yyx2NA5yG+0+zdlV5m1uJqrL++c+X1DZt5Tpk9Cb5pAWQMNy5h50A== X-Received: by 2002:a17:906:12c7:: with SMTP id l7mr6383619ejb.306.1598081681706; Sat, 22 Aug 2020 00:34:41 -0700 (PDT) Received: from [192.168.1.47] (185-219-167-24-static.vivo.cz. [185.219.167.24]) by smtp.gmail.com with ESMTPSA id k10sm2753169ejj.108.2020.08.22.00.34.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 22 Aug 2020 00:34:40 -0700 (PDT) Subject: Re: KASAN: use-after-free Write in vcs_read To: syzbot , akpm@linux-foundation.org, gregkh@linuxfoundation.org, jslaby@suse.com, jslaby@suse.cz, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nico@fluxnic.net, syzkaller-bugs@googlegroups.com References: <0000000000005d511305ad725632@google.com> From: Jiri Slaby Message-ID: Date: Sat, 22 Aug 2020 09:34:39 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <0000000000005d511305ad725632@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 22. 08. 20, 9:31, syzbot wrote: > syzbot has bisected this issue to: > > commit b1c32fcfadf5593ab7a63261cc8a5747c36e627e > Author: Jiri Slaby > Date: Tue Aug 18 08:57:05 2020 +0000 > > vc_screen: extract vcs_read_buf_header It's like 7th e-mail about the very same issue. Can it be suspended/acknowledged somehow? > Reported-by: syzbot+ad1f53726c3bd11180cb@syzkaller.appspotmail.com I haven't managed to find the root cause on Fri yet, I will chase it on Mon again. thanks, -- js suse labs