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=-11.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 04F24C433B4 for ; Wed, 5 May 2021 16:19:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CB61160FD9 for ; Wed, 5 May 2021 16:19:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233952AbhEEQUo (ORCPT ); Wed, 5 May 2021 12:20:44 -0400 Received: from mail.kernel.org ([198.145.29.99]:37968 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233830AbhEEQUn (ORCPT ); Wed, 5 May 2021 12:20:43 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E4F46121F; Wed, 5 May 2021 16:19:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620231587; bh=fT7+zpvoWRmNytMZL2ErSfKueKL5e/EoY6lsi8pRg/s=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ACK3h/Z1y1ei7RhZZmJay3wwC2r70Mkq1UGqC9m+8ot1a05qF/bm3MPpdKXJeY3q5 1FsDEnX0pFhV+lJYGdVNxGlfHrIm/9uu5hu0N4BWVohSfusDQdQQCch0FP/9kCrmoG 8mPufec4nnVbS/NabyXAQ3nAI3MGYTaA5NiVxQjp+uiSk56q3E4KwkqW9CAN58egCV 7S6hFJZMtBy4VS4/HfaKFW6SMj9sIj9yeBJs16kHMDxv9Ja4l9nPKLJsSuhdTmm4Hw qSmEkEYh18RYjL2Ww9hntexWe6QlOVLZBHOVuUufqvE9ay+NH9yOa9tTlP2mW0P31n eEekriI6jap5A== Date: Wed, 5 May 2021 09:19:44 -0700 From: Eric Biggers To: Anirudh Rayabharam Cc: Theodore Ts'o , Andreas Dilger , 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] ext4: fix kernel infoleak via ext4_extent_header Message-ID: References: <20210505133011.32484-1-mail@anirudhrb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210505133011.32484-1-mail@anirudhrb.com> Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Wed, May 05, 2021 at 07:00:10PM +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 > Signed-off-by: Anirudh Rayabharam Can you include a "Fixes:" tag? - Eric