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, 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 BC494C7618B for ; Wed, 24 Jul 2019 04:34:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 83187227BF for ; Wed, 24 Jul 2019 04:34:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563942893; bh=XFoLGs07OCkuBQXFVahilk1Hef1hE5SSE6f/fkXHSzI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=LGzx7d13/wtBEEgGcbXUwzWT6BiALPqE7f6BHNirXGqHI7/k1vVETz413qMumvtP0 MszfG7KtA4VxMM3Yex4Quf0v/GAJ3zYPxUrByPfyqYevafet/vPz9Zu4pVAYZmn/at gt5xCrkeF2kz4QE0eqvz0KeqqZDLkC+LCHqtspxQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725861AbfGXEex (ORCPT ); Wed, 24 Jul 2019 00:34:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:55802 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725813AbfGXEex (ORCPT ); Wed, 24 Jul 2019 00:34:53 -0400 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 DF0FF21841; Wed, 24 Jul 2019 04:34:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563942892; bh=XFoLGs07OCkuBQXFVahilk1Hef1hE5SSE6f/fkXHSzI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tt8V/DaiVHyRZQVj4hsDKR0bktUWQo6UkUg18kH/w1qtiXfqstl08Ltu6Qa2IcXuG JUOAMUevpNlM+lUw3CN8t2M1SgVd7W6MSh/dvye735D0maVjKSXbH038k6EQXob6ZN q5cuEpFnQ8IHDfKwcO9GoTlx5kD6CzWVw44HSr1A= Date: Tue, 23 Jul 2019 21:34:50 -0700 From: Eric Biggers To: Tetsuo Handa Cc: linux-security-module@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: Reminder: 2 open syzbot bugs in "security/tomoyo" subsystem Message-ID: <20190724043450.GZ643@sol.localdomain> Mail-Followup-To: Tetsuo Handa , linux-security-module@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <20190724024251.GF643@sol.localdomain> <7800c28f-bf1c-56cd-c82e-b1ff174ccbc8@i-love.sakura.ne.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7800c28f-bf1c-56cd-c82e-b1ff174ccbc8@i-love.sakura.ne.jp> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: On Wed, Jul 24, 2019 at 12:18:47PM +0900, Tetsuo Handa wrote: > > -------------------------------------------------------------------------------- > > Title: KASAN: invalid-free in tomoyo_realpath_from_path > > Last occurred: 57 days ago > > Reported: 56 days ago > > Branches: net-next > > Dashboard link: https://syzkaller.appspot.com/bug?id=e9e5a1d41c3fb5d0f79aeea0e4cd535f160a6702 > > Original thread: https://lkml.kernel.org/lkml/000000000000785e9d0589ec359a@google.com/T/#u > > This cannot be a TOMOYO's bug. We are waiting for a reproducer but > no crash occurred since then. Maybe it is time to close as invalid. Maybe. Did you check for stack buffer overflows in the functions that tomoyo_realpath_from_path() calls? Perhaps something is corrupting the 'buf' variable in the parent's stack frame. - Eric