From: Theodore Ts'o Subject: Re: [PATCH 1/4] ext4: fix potential use after free during resize V2 Date: Tue, 2 Dec 2014 18:06:56 -0500 Message-ID: <20141202230656.GE13618@thunk.org> References: <1417518054-21733-1-git-send-email-dmonakhov@openvz.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org To: Dmitry Monakhov Return-path: Received: from imap.thunk.org ([74.207.234.97]:35581 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932722AbaLBXG7 (ORCPT ); Tue, 2 Dec 2014 18:06:59 -0500 Content-Disposition: inline In-Reply-To: <1417518054-21733-1-git-send-email-dmonakhov@openvz.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Tue, Dec 02, 2014 at 03:00:51PM +0400, Dmitry Monakhov wrote: > We need some sort of synchronization while updating ->s_group_desc > because there are a lot of users which can access old ->s_group_desc > array after it was released. > > changes from V1: > - use RCU instead seqcount > > Signed-off-by: Dmitry Monakhov Thanks, applied - Ted