From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932326Ab1HCXfG (ORCPT ); Wed, 3 Aug 2011 19:35:06 -0400 Received: from cantor2.suse.de ([195.135.220.15]:34140 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932182Ab1HCXai (ORCPT ); Wed, 3 Aug 2011 19:30:38 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Wed Aug 3 15:12:54 2011 Message-Id: <20110803221254.376940267@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Wed, 03 Aug 2011 15:02:02 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Alasdair G Kergon Subject: [102/102] dm: fix idr leak on module removal In-Reply-To: <20110803221345.GA10346@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.0-stable review patch. If anyone has any objections, please let us know. ------------------ From: Alasdair G Kergon commit d15b774c2920d55e3d58275c97fbe3adc3afde38 upstream. Destroy _minor_idr when unloading the core dm module. (Found by kmemleak.) Signed-off-by: Alasdair G Kergon Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -37,6 +37,8 @@ static const char *_name = DM_NAME; static unsigned int major = 0; static unsigned int _major = 0; +static DEFINE_IDR(_minor_idr); + static DEFINE_SPINLOCK(_minor_lock); /* * For bio-based dm. @@ -313,6 +315,12 @@ static void __exit dm_exit(void) while (i--) _exits[i](); + + /* + * Should be empty by this point. + */ + idr_remove_all(&_minor_idr); + idr_destroy(&_minor_idr); } /* @@ -1705,8 +1713,6 @@ static int dm_any_congested(void *conges /*----------------------------------------------------------------- * An IDR is used to keep track of allocated minor numbers. *---------------------------------------------------------------*/ -static DEFINE_IDR(_minor_idr); - static void free_minor(int minor) { spin_lock(&_minor_lock);