From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751511AbdIIXk6 (ORCPT ); Sat, 9 Sep 2017 19:40:58 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:43076 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751792AbdIIXA0 (ORCPT ); Sat, 9 Sep 2017 19:00:26 -0400 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Suman Anna" , "Greg Kroah-Hartman" Date: Sat, 09 Sep 2017 22:47:14 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.16 035/233] uio: fix incorrect memory leak cleanup In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:6f00:88c8:c921:d332 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.48-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Suman Anna commit 0d83539092ddb1ab79b4d65bccb866bf07ea2ccd upstream. Commit 75f0aef6220d ("uio: fix memory leak") has fixed up some memory leaks during the failure paths of the addition of uio attributes, but still is not correct entirely. A kobject_uevent() failure still needs a kobject_put() and the kobject container structure allocation failure before the kobject_init() doesn't need a kobject_put(). Fix this properly. Fixes: 75f0aef6220d ("uio: fix memory leak") Signed-off-by: Suman Anna Signed-off-by: Greg Kroah-Hartman Signed-off-by: Ben Hutchings --- drivers/uio/uio.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -291,7 +291,7 @@ static int uio_dev_add_attributes(struct map = kzalloc(sizeof(*map), GFP_KERNEL); if (!map) { ret = -ENOMEM; - goto err_map_kobj; + goto err_map; } kobject_init(&map->kobj, &map_attr_type); map->mem = mem; @@ -301,7 +301,7 @@ static int uio_dev_add_attributes(struct goto err_map_kobj; ret = kobject_uevent(&map->kobj, KOBJ_ADD); if (ret) - goto err_map; + goto err_map_kobj; } for (pi = 0; pi < MAX_UIO_PORT_REGIONS; pi++) { @@ -320,7 +320,7 @@ static int uio_dev_add_attributes(struct portio = kzalloc(sizeof(*portio), GFP_KERNEL); if (!portio) { ret = -ENOMEM; - goto err_portio_kobj; + goto err_portio; } kobject_init(&portio->kobj, &portio_attr_type); portio->port = port; @@ -331,7 +331,7 @@ static int uio_dev_add_attributes(struct goto err_portio_kobj; ret = kobject_uevent(&portio->kobj, KOBJ_ADD); if (ret) - goto err_portio; + goto err_portio_kobj; } return 0;