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[209.132.180.67]) by mx.google.com with ESMTP id p21-v6si780324plq.94.2018.08.01.23.04.30; Wed, 01 Aug 2018 23:05:00 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726192AbeHBHwf (ORCPT + 99 others); Thu, 2 Aug 2018 03:52:35 -0400 Received: from mail.cn.fujitsu.com ([183.91.158.132]:45429 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726106AbeHBHwf (ORCPT ); Thu, 2 Aug 2018 03:52:35 -0400 X-IronPort-AV: E=Sophos;i="5.43,368,1503331200"; d="scan'208";a="42971795" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 02 Aug 2018 14:03:05 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id BC5A54B6ADE4; Thu, 2 Aug 2018 14:03:02 +0800 (CST) Received: from localhost.localdomain (10.167.225.56) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.399.0; Thu, 2 Aug 2018 14:03:01 +0800 Date: Thu, 2 Aug 2018 14:00:53 +0800 From: Chao Fan To: Dou Liyang CC: , , , , , , , , , Subject: Re: [PATCH v4 4/4] x86/boot/KASLR: Limit kaslr to choosing the immovable memory Message-ID: <20180802060052.GD6723@localhost.localdomain> References: <20180723092908.32656-1-fanc.fnst@cn.fujitsu.com> <20180723092908.32656-5-fanc.fnst@cn.fujitsu.com> <961acf17-c76f-1c51-f7e6-a7854a487a09@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <961acf17-c76f-1c51-f7e6-a7854a487a09@cn.fujitsu.com> User-Agent: Mutt/1.10.0 (2018-05-17) X-Originating-IP: [10.167.225.56] X-yoursite-MailScanner-ID: BC5A54B6ADE4.AD7CD X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: fanc.fnst@cn.fujitsu.com X-Spam-Status: No Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 02, 2018 at 01:46:29PM +0800, Dou Liyang wrote: >Hi Fan, > >At 07/23/2018 05:29 PM, Chao Fan wrote: >> If 'CONFIG_MEMORY_HOTREMOVE' specified and the account of immovable >> memory regions is not zero. Calculate the intersection between memory >> regions from e820/efi memory table and immovable memory regions. >> Or go on the old code. >> >> Rename process_mem_region to slots_count to match slots_fetch_random, >> and name new function as process_mem_region. >> >> Signed-off-by: Chao Fan >> --- >> arch/x86/boot/compressed/kaslr.c | 66 ++++++++++++++++++++++++++------ >> 1 file changed, 55 insertions(+), 11 deletions(-) >> >> diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c >> index 4705682caf1f..10bda3a1fcaa 100644 >> --- a/arch/x86/boot/compressed/kaslr.c >> +++ b/arch/x86/boot/compressed/kaslr.c >> @@ -631,9 +631,9 @@ static unsigned long slots_fetch_random(void) >> return 0; >> } >> -static void process_mem_region(struct mem_vector *entry, >> - unsigned long minimum, >> - unsigned long image_size) >> +static void slots_count(struct mem_vector *entry, > ^^^^^^^^^^^ > is not suitable. >IMO, how about process_mem_slots() or you may have a better name, it's >up to you. It's from Kees Cook's advise, he wants to ues slots_count() to match slots_fetch_random() in my old PATCH long long ago. Since the method of handling this part is not changed a lot, so I keep this name. > >> + unsigned long minimum, >> + unsigned long image_size) >> { >> struct mem_vector region, overlap; >> struct slot_area slot_area; > >slot_area is also unused. Yes, I will make a PATCH to do the clean jobs. Thanks, Chao Fan > >Thanks, > dou >