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=-6.4 required=3.0 tests=BAYES_00,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 889A9C433DF for ; Sat, 22 Aug 2020 07:34:44 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 5262420825 for ; Sat, 22 Aug 2020 07:34:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5262420825 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id CC7FD8D0017; Sat, 22 Aug 2020 03:34:43 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C78148D0008; Sat, 22 Aug 2020 03:34:43 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B68558D0017; Sat, 22 Aug 2020 03:34:43 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 9E2E58D0008 for ; Sat, 22 Aug 2020 03:34:43 -0400 (EDT) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 666F33634 for ; Sat, 22 Aug 2020 07:34:43 +0000 (UTC) X-FDA: 77177392446.22.cake65_36020c627040 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin22.hostedemail.com (Postfix) with ESMTP id 2EE8C18038E60 for ; Sat, 22 Aug 2020 07:34:43 +0000 (UTC) X-HE-Tag: cake65_36020c627040 X-Filterd-Recvd-Size: 3063 Received: from mail-ej1-f42.google.com (mail-ej1-f42.google.com [209.85.218.42]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Sat, 22 Aug 2020 07:34:42 +0000 (UTC) Received: by mail-ej1-f42.google.com with SMTP id qc22so5191039ejb.4 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=sXutw/McHkLAI9rbPjBOaz6g8kxwmAdRSG0Qi0dJE7f91lhVCNCpt0hzzIzveD00O/ PQ9Dv0drkMiLDHddvfustsB8/4t2JKBHpTNwonTjsR9kkK9MVheVEirL5VzJirdd2xKi 8hsvCBnB0itHuHfn4bv9ftuxmO+MvRfpu81QSCJmFGQkypB0vFEx8c9g9tVPmxNr0ldF xgUeq1w8z7s3dJPf6I+gBmyHcvDFOGmUM2SM8UlmBBooV4BVUBKfDZWq+hT0YFKLvnmB 93D93NeWchdUb5ViXA+kSmRIyL+SoRmuuXxAMmK+sEIaj4CN1s+KcAMeQx4QMqMb0qXk ijSQ== X-Gm-Message-State: AOAM531C1UtJ+E9n6nP9KlTG8AUlKKnDZ2MRqS4lbic5p+rHJunX/U+k 4+1fKL/SXFGYL3nPYbtLhsc= 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 X-Rspamd-Queue-Id: 2EE8C18038E60 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000018, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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