From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 1EFE87D048 for ; Wed, 11 Jul 2018 11:14:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732502AbeGKLQw (ORCPT ); Wed, 11 Jul 2018 07:16:52 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:40474 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732387AbeGKLQw (ORCPT ); Wed, 11 Jul 2018 07:16:52 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3C46C406DE36; Wed, 11 Jul 2018 11:13:03 +0000 (UTC) Received: from oldenburg.str.redhat.com (dhcp-192-212.str.redhat.com [10.33.192.212]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 95E9120389E0; Wed, 11 Jul 2018 11:12:58 +0000 (UTC) Subject: Re: [RFC PATCH v2 20/27] x86/cet/shstk: ELF header parsing of CET To: Yu-cheng Yu , x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Cyrill Gorcunov , Dave Hansen , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , "Ravi V. Shankar" , Vedvyas Shanbhogue References: <20180710222639.8241-1-yu-cheng.yu@intel.com> <20180710222639.8241-21-yu-cheng.yu@intel.com> From: Florian Weimer Message-ID: <10c224e9-933a-20d8-a286-5065a6cb10f1@redhat.com> Date: Wed, 11 Jul 2018 13:12:57 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180710222639.8241-21-yu-cheng.yu@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Wed, 11 Jul 2018 11:13:03 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.7]); Wed, 11 Jul 2018 11:13:03 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'fweimer@redhat.com' RCPT:'' Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On 07/11/2018 12:26 AM, Yu-cheng Yu wrote: > + /* > + * PT_NOTE segment is small. Read at most > + * PAGE_SIZE. > + */ > + if (note_size > PAGE_SIZE) > + note_size = PAGE_SIZE; That's not really true. There are some huge PT_NOTE segments out there. Why can't you check the notes after the executable has been mapped? Thanks, Florian -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html