From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941850AbcKQKxq (ORCPT ); Thu, 17 Nov 2016 05:53:46 -0500 Received: from ozlabs.org ([103.22.144.67]:43569 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932717AbcKQKxl (ORCPT ); Thu, 17 Nov 2016 05:53:41 -0500 From: Michael Ellerman To: keescook@chromium.org Cc: kernel-hardening@lists.openwall.com, linux-kernel@vger.kernel.org Subject: Re: [kernel-hardening] Re: [PATCH] lkdtm: Add tests for LIST_POISON and ZERO_SIZE_PTR In-Reply-To: <201611160623.afRvXZ5d%fengguang.wu@intel.com> References: <201611160623.afRvXZ5d%fengguang.wu@intel.com> User-Agent: Notmuch/0.21 (https://notmuchmail.org) Date: Thu, 17 Nov 2016 21:53:31 +1100 Message-ID: <87bmxextqs.fsf@concordia.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org kbuild test robot writes: > [auto build test ERROR on char-misc/char-misc-testing] > [also build test ERROR on v4.9-rc5] > [cannot apply to next-20161115] > [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] > > url: https://github.com/0day-ci/linux/commits/Michael-Ellerman/lkdtm-Add-tests-for-LIST_POISON-and-ZERO_SIZE_PTR/20161115-235441 > config: i386-randconfig-i0-201646 (attached as .config) > compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4 > reproduce: > # save the attached .config to linux build tree > make ARCH=i386 > > All errors (new ones prefixed by >>): > >>> ERROR: "mmap_min_addr" [drivers/misc/lkdtm.ko] undefined! I couldn't see what was causing this, but of course it's just that mmap_min_addr is not exported, and in that config LKDTM is a module. I always build it in which is why I didn't notice. I'm not sure we want to EXPORT_SYMBOL mmap_min_addr just for this test do we? I could change the test to use mmap_min_addr if LKDTM is built-in, and otherwise just map at zero. Dunno. cheers