Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758748AbaGXGAF (ORCPT ); Thu, 24 Jul 2014 02:00:05 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:16449 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750904AbaGXGAD (ORCPT ); Thu, 24 Jul 2014 02:00:03 -0400 Message-ID: <53D0A0CC.9070506@parallels.com> Date: Thu, 24 Jul 2014 09:59:40 +0400 From: Vasily Averin Organization: Parallels User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130329 Thunderbird/17.0.5 MIME-Version: 1.0 CC: Alexander Viro , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Richard Weinberger Subject: Re: [PATCH v4] fs: umount on symlink leaks mnt count References: <53CCCF9F.6090301@parallels.com> <1406095603.2509.11.camel@perseus.fritz.box> In-Reply-To: <1406095603.2509.11.camel@perseus.fritz.box> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org CVE-2014-5045 was assigned for this issue On 07/23/2014 10:06 AM, Ian Kent wrote: > On Mon, 2014-07-21 at 12:30 +0400, Vasily Averin wrote: >> Currently umount on symlink blocks following umount: >> >> /vz is separate mount >> >> # ls /vz/ -al | grep test >> drwxr-xr-x. 2 root root 4096 Jul 19 01:14 testdir >> lrwxrwxrwx. 1 root root 11 Jul 19 01:16 testlink -> /vz/testdir >> # umount -l /vz/testlink >> umount: /vz/testlink: not mounted (expected) >> >> # lsof /vz >> # umount /vz >> umount: /vz: device is busy. (unexpected) >> >> In this case mountpoint_last() gets an extra refcount on path->mnt >> >> Signed-off-by: Vasily Averin > > Acked-by: Ian Kent -- 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/