From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752875AbZLRJsf (ORCPT ); Fri, 18 Dec 2009 04:48:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752845AbZLRJsc (ORCPT ); Fri, 18 Dec 2009 04:48:32 -0500 Received: from hera.kernel.org ([140.211.167.34]:55044 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750982AbZLRJs2 (ORCPT ); Fri, 18 Dec 2009 04:48:28 -0500 Message-ID: <4B2B4F93.2080203@kernel.org> Date: Fri, 18 Dec 2009 01:46:59 -0800 From: Yinghai Lu User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner , Andrew Morton , Jesse Barnes CC: "linux-kernel@vger.kernel.org" Subject: [PATCH 2/9] x86: check range in update range References: <4B2B4C19.6010402@kernel.org> In-Reply-To: <4B2B4C19.6010402@kernel.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org fend off wrong range Signed-off-by: Yinghai Lu --- kernel/range.c | 9 +++++++++ 1 file changed, 9 insertions(+) Index: linux-2.6/kernel/range.c =================================================================== --- linux-2.6.orig/kernel/range.c +++ linux-2.6/kernel/range.c @@ -13,6 +13,9 @@ int add_range(struct range *range, int az, int nr_range, u64 start, u64 end) { + if (start > end) + return nr_range; + /* Out of slots: */ if (nr_range >= az) return nr_range; @@ -30,6 +33,9 @@ int add_range_with_merge(struct range *r { int i; + if (start > end) + return nr_range; + /* Try to merge it with old one: */ for (i = 0; i < nr_range; i++) { u64 final_start, final_end; @@ -59,6 +65,9 @@ void subtract_range(struct range *range, { int i, j; + if (start > end) + return; + for (j = 0; j < az; j++) { if (!range[j].end) continue;