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=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=unavailable 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 9324EC432C0 for ; Fri, 29 Nov 2019 12:55:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 73F1721721 for ; Fri, 29 Nov 2019 12:55:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726806AbfK2MzZ (ORCPT ); Fri, 29 Nov 2019 07:55:25 -0500 Received: from outgoing-auth-1.mit.edu ([18.9.28.11]:41046 "EHLO outgoing.mit.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726360AbfK2MzZ (ORCPT ); Fri, 29 Nov 2019 07:55:25 -0500 Received: from callcc.thunk.org (97-71-153.205.biz.bhn.net [97.71.153.205] (may be forged)) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id xATCtJcw013959 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 29 Nov 2019 07:55:20 -0500 Received: by callcc.thunk.org (Postfix, from userid 15806) id 18923421A48; Fri, 29 Nov 2019 07:55:19 -0500 (EST) Date: Fri, 29 Nov 2019 07:55:19 -0500 From: "Theodore Y. Ts'o" To: syzbot Cc: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: KASAN: use-after-free Write in ext4_mark_inode_dirty Message-ID: <20191129125519.GA16443@mit.edu> References: <000000000000fd1f29059877e56a@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000fd1f29059877e56a@google.com> User-Agent: Mutt/1.12.2 (2019-09-21) Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Fri, Nov 29, 2019 at 12:20:10AM -0800, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: a2d79c71 Merge tag 'for-5.3/io_uring-20190711' of git://gi.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1632a03fa00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=bf58f4f254e2639 > dashboard link: https://syzkaller.appspot.com/bug?extid=1e407c24e65e1fca3ecf > compiler: clang version 9.0.0 (/home/glider/llvm/clang > 80fee25776c2fb61e74c1ecb1a523375c2500b69) #syz dup: KASAN: use-after-free Write in __ext4_expand_extra_isize (2) - Ted