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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 E920DC43460 for ; Thu, 6 May 2021 18:58:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BA94D61164 for ; Thu, 6 May 2021 18:58:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233662AbhEFS7u (ORCPT ); Thu, 6 May 2021 14:59:50 -0400 Received: from sender4-of-o53.zoho.com ([136.143.188.53]:21392 "EHLO sender4-of-o53.zoho.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231461AbhEFS7r (ORCPT ); Thu, 6 May 2021 14:59:47 -0400 ARC-Seal: i=1; a=rsa-sha256; t=1620327524; cv=none; d=zohomail.com; s=zohoarc; b=DKFQo+TdVYSzQLKc2pe9zuGqvNIFet/cuZcjijUEn13DOndMrjTXkmpVX+sarr/23njm3aVKlEzk40Q9lXdgutdE4doYtd0uJtxj9CMNX90RpOcScx6GCeCPDPEqwUptCpGUP9teFNqVJ7lmzKCsocmxiISH+XGJ+k/Fi1Lvm6c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1620327524; h=Content-Type:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To; bh=UQxTdm3WU/SODKCa539VDrkQBD+lEolNiPXirKXM8EA=; b=F0fOJxno/RL479ypt35m7z4yBybgwcrN5HF/d/gWQVGv7majlj59WO2nFzT6cJVcAYGZthbJyJVW3x1DUhtHPRt2EwYtCLPdROvPeyd5ChGocfiYP4uiV/zvdxaRFsDqm2XjsRYM0prgWliNdHpcN09/HwJmdy3MA4Qt+BPKGFI= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=anirudhrb.com; spf=pass smtp.mailfrom=mail@anirudhrb.com; dmarc=pass header.from= header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1620327524; s=zoho; d=anirudhrb.com; i=mail@anirudhrb.com; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version:Content-Type:In-Reply-To; bh=UQxTdm3WU/SODKCa539VDrkQBD+lEolNiPXirKXM8EA=; b=Gi9NGngB6HNtO+KBlNBrOpn5tHYL0L1rQgYN8bHoaSQ+imsLAxLJcyjCXI+8N1w4 7x4wWOqY10RF+uoFcfet4y3/0DDRPgWiQfkuYnvjpk3u4kYzUw1ee9h67Gv6+pAobF1 objUv1OHw0/x5HMRR3JFxS2YCmglvCTEX0Q1sIso= Received: from anirudhrb.com (49.207.210.243 [49.207.210.243]) by mx.zohomail.com with SMTPS id 1620327523068162.41513027096732; Thu, 6 May 2021 11:58:43 -0700 (PDT) Date: Fri, 7 May 2021 00:28:35 +0530 From: Anirudh Rayabharam To: Eric Biggers 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: X-ZohoMailClient: External Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 05, 2021 at 09:19:44AM -0700, Eric Biggers wrote: > 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? Sent v2! Thanks! - Anirudh. > > - Eric