From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752796AbZGJCG6 (ORCPT ); Thu, 9 Jul 2009 22:06:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751224AbZGJCGv (ORCPT ); Thu, 9 Jul 2009 22:06:51 -0400 Received: from mail-px0-f193.google.com ([209.85.216.193]:60776 "EHLO mail-px0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751100AbZGJCGu (ORCPT ); Thu, 9 Jul 2009 22:06:50 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:to:cc:content-type:date:message-id:mime-version :x-mailer:content-transfer-encoding; b=bss9aMhX/wSlHPDYh8uUZK5SoVd4jl8T6yxhoWrrS6ZpTN9oUKKy7UtGysR0XQxmYK AqM86+Z7B/9NTZjdlK1vuCfClpQbW2rHjJasjCdIQZYRVDkU34xJSiRJ2dPoeRmfj9Tj UjlPlZ/sKLrhhE46ZicLoDoklaldwzGikDQd4= Subject: [PATCH] vmalloc.c: fix lose num_physpages checking From: "Figo.zhang" To: Andrew Morton , Linus Torvalds Cc: lkml , Tejun Heo , Ingo Molnar Content-Type: text/plain Date: Fri, 10 Jul 2009 10:06:44 +0800 Message-Id: <1247191604.2572.3.camel@myhost> Mime-Version: 1.0 X-Mailer: Evolution 2.26.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org __get_vm_area_node() lose size (physpages limit) checking, it be called by __get_vm_area() that some drivers called it directly. Signed-off-by: Figo.zhang --- mm/vmalloc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index f8189a4..99f3aea 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -1144,7 +1144,7 @@ static struct vm_struct *__get_vm_area_node(unsigned long size, } size = PAGE_ALIGN(size); - if (unlikely(!size)) + if (unlikely(!size || (size >> PAGE_SHIFT) > num_physpages)) return NULL; area = kmalloc_node(sizeof(*area), gfp_mask & GFP_RECLAIM_MASK, node);