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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 95896C48BE8 for ; Wed, 16 Jun 2021 23:45:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 77DA7610EA for ; Wed, 16 Jun 2021 23:45:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234773AbhFPXsE (ORCPT ); Wed, 16 Jun 2021 19:48:04 -0400 Received: from outgoing-auth-1.mit.edu ([18.9.28.11]:34108 "EHLO outgoing.mit.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S231389AbhFPXsD (ORCPT ); Wed, 16 Jun 2021 19:48:03 -0400 Received: from cwcc.thunk.org (pool-72-74-133-215.bstnma.fios.verizon.net [72.74.133.215]) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 15GNjYBQ004246 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 16 Jun 2021 19:45:35 -0400 Received: by cwcc.thunk.org (Postfix, from userid 15806) id 9069E15C3CB8; Wed, 16 Jun 2021 19:45:34 -0400 (EDT) Date: Wed, 16 Jun 2021 19:45:34 -0400 From: "Theodore Ts'o" To: Anirudh Rayabharam Cc: Andreas Dilger , Dave Kleikamp , Alex Tomas , Andrew Morton , gregkh@linuxfoundation.org, linux-kernel-mentees@lists.linuxfoundation.org, syzbot+2dcfeaf8cb49b05e8f1a@syzkaller.appspotmail.com, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] ext4: fix kernel infoleak via ext4_extent_header Message-ID: References: <20210506185655.7118-1-mail@anirudhrb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210506185655.7118-1-mail@anirudhrb.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 07, 2021 at 12:26:54AM +0530, Anirudh Rayabharam wrote: > Initialize eh_generation of struct ext4_extent_header to prevent leaking > info to userspace. Fixes KMSAN kernel-infoleak bug reported by syzbot at: > http://syzkaller.appspot.com/bug?id=78e9ad0e6952a3ca16e8234724b2fa92d041b9b8 > > Reported-by: syzbot+2dcfeaf8cb49b05e8f1a@syzkaller.appspotmail.com > Fixes: a86c61812637 ("[PATCH] ext3: add extent map support") > Signed-off-by: Anirudh Rayabharam Applied, thanks. - Ted