Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756307Ab2ENL6i (ORCPT ); Mon, 14 May 2012 07:58:38 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:54818 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756207Ab2ENL6h (ORCPT ); Mon, 14 May 2012 07:58:37 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.4.0 Message-ID: <4FB0F38A.5020909@jp.fujitsu.com> Date: Mon, 14 May 2012 20:59:06 +0900 From: Yasuaki Ishimatsu User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Lai Jiangshan CC: Mel Gorman , Andrew Morton , linux-mm@kvack.org, LKML Subject: [Patch 4/4] memblock: compare current_limit with end variable at memblock_find_in_range_node() References: <4FACA79C.9070103@cn.fujitsu.com> <4FB0F174.1000400@jp.fujitsu.com> In-Reply-To: <4FB0F174.1000400@jp.fujitsu.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1424 Lines: 37 memblock_find_in_range_node() does not compare memblock.current_limit with end variable. Thus even if memblock.current_limit is smaller than end variable, the function allocates memory address that is bigger than memblock.current_limit. The patch adds the check to "memblock_find_in_range_node()" Signed-off-by: Yasuaki Ishimatsu --- mm/memblock.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) Index: linux-3.4-rc6/mm/memblock.c =================================================================== --- linux-3.4-rc6.orig/mm/memblock.c 2012-05-15 03:51:25.104153055 +0900 +++ linux-3.4-rc6/mm/memblock.c 2012-05-15 04:16:49.468094485 +0900 @@ -97,11 +97,12 @@ phys_addr_t __init_memblock memblock_fin phys_addr_t align, int nid) { phys_addr_t this_start, this_end, cand; + phys_addr_t current_limit = memblock.current_limit; u64 i; /* pump up @end */ - if (end == MEMBLOCK_ALLOC_ACCESSIBLE) - end = memblock.current_limit; + if ((end == MEMBLOCK_ALLOC_ACCESSIBLE) || (end > current_limit)) + end = current_limit; /* avoid allocating the first page */ start = max_t(phys_addr_t, start, PAGE_SIZE); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/