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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,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 8E153C432C0 for ; Tue, 19 Nov 2019 04:36:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 55C0922319 for ; Tue, 19 Nov 2019 04:36:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574138203; bh=cbaM61dNUYFafEJ8WccG4FE54uY5qL0guPYtReMqLrk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=ib2nzJ6eopCnoUb2Ys62RkVFNt85prwxNB95GQdyHHCRGgUQld9DPs8wRhS52Tmr8 ubcVezKtGTXZLfLwzAIciCiRJtNZoUHGGufCuSYhPbuPnW+YP7/gYKW/y1KFzlE5aH hfLiO/mQD42/IbFlzQL2LPfdOzGWn5/5QPhdNnSM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727262AbfKSEgn (ORCPT ); Mon, 18 Nov 2019 23:36:43 -0500 Received: from mail.kernel.org ([198.145.29.99]:49950 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726647AbfKSEgm (ORCPT ); Mon, 18 Nov 2019 23:36:42 -0500 Received: from sol.localdomain (c-24-5-143-220.hsd1.ca.comcast.net [24.5.143.220]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2EFC4222DD; Tue, 19 Nov 2019 04:36:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574138202; bh=cbaM61dNUYFafEJ8WccG4FE54uY5qL0guPYtReMqLrk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=hW06FRaShXqHJItKoZWFgjy/eR46sipyYpEy1XibENDVVj5w0B4bb9vp4t7oaAPaX Y30S0MwTfRTPyHRZz7eD59TmY7kvg+mWuapGzy99/CHWXvFtqPphGLZ28kGv19aI/3 1fS7jrTkMejLIGBoCpzxVI8Yzvv66UGrEGTm/AKk= Date: Mon, 18 Nov 2019 20:36:40 -0800 From: Eric Biggers To: "Theodore Y. Ts'o" Cc: kbuild test robot , kbuild-all@lists.01.org, Ext4 Developers List , syzbot+f8d6f8386ceacdbfff57@syzkaller.appspotmail.com, stable@kernel.org Subject: Re: [PATCH -v2] ext4: add more paranoia checking in ext4_expand_extra_isize handling Message-ID: <20191119043640.GE163020@sol.localdomain> References: <20191108024841.9668-1-tytso@mit.edu> <201911101835.qg5bu1Me%lkp@intel.com> <20191110121510.GH23325@mit.edu> <20191119021526.GB3147@sol.localdomain> <20191119042120.GD4262@mit.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191119042120.GD4262@mit.edu> 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 Mon, Nov 18, 2019 at 11:21:20PM -0500, Theodore Y. Ts'o wrote: > On Mon, Nov 18, 2019 at 06:15:26PM -0800, Eric Biggers wrote: > > Is this patch intended to address > > https://lore.kernel.org/linux-ext4/000000000000950f21059564e4c7@google.com > > as well? If so, you can add the second Reported-by line so that both syzbot > > reports get closed. > > Yes, it appears to be the same issue. Thanks for pointing this out! > > - Ted There's actually a third that looks very similar too: "KASAN: use-after-free Write in __ext4_expand_extra_isize (2)" https://lkml.kernel.org/linux-ext4/0000000000000d74c7059564e17f@google.com/ If these are all fixed by this patch, you can use: Reported-by: syzbot+f8d6f8386ceacdbfff57@syzkaller.appspotmail.com Reported-by: syzbot+33d7ea72e47de3bdf4e1@syzkaller.appspotmail.com Reported-by: syzbot+44b6763edfc17144296f@syzkaller.appspotmail.com