From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965020Ab2C3WVn (ORCPT ); Fri, 30 Mar 2012 18:21:43 -0400 Received: from mail-yx0-f174.google.com ([209.85.213.174]:64808 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935778Ab2C3VMT (ORCPT ); Fri, 30 Mar 2012 17:12:19 -0400 Message-Id: <20120330194849.068360500@linuxfoundation.org> User-Agent: quilt/0.60-19.1 Date: Fri, 30 Mar 2012 12:49:42 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, NeilBrown Subject: [ 069/149] md/bitmap: ensure to load bitmap when creating via sysfs. In-Reply-To: <20120330195823.GA31857@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: NeilBrown commit 4474ca42e2577563a919fd3ed782e2ec55bf11a2 upstream. When commit 69e51b449d383e (md/bitmap: separate out loading a bitmap...) created bitmap_load, it missed calling it after bitmap_create when a bitmap is created through the sysfs interface. So if a bitmap is added this way, we don't allocate memory properly and can crash. This is suitable for any -stable release since 2.6.35. Signed-off-by: NeilBrown Signed-off-by: Greg Kroah-Hartman --- drivers/md/bitmap.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1904,6 +1904,8 @@ location_store(struct mddev *mddev, cons if (mddev->pers) { mddev->pers->quiesce(mddev, 1); rv = bitmap_create(mddev); + if (!rv) + rv = bitmap_load(mddev); if (rv) { bitmap_destroy(mddev); mddev->bitmap_info.offset = 0;