From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qu Wenruo , Chris Mason Subject: [PATCH 3.17 011/146] btrfs: Fix the wrong condition judgment about subset extent map Date: Tue, 28 Oct 2014 11:32:33 +0800 Message-Id: <20141028033343.923305147@linuxfoundation.org> In-Reply-To: <20141028033343.441992423@linuxfoundation.org> References: <20141028033343.441992423@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Qu Wenruo commit 32be3a1ac6d09576c57063c6c350ca36eaebdbd3 upstream. Previous commit: btrfs: Fix and enhance merge_extent_mapping() to insert best fitted extent map is using wrong condition to judgement whether the range is a subset of a existing extent map. This may cause bug in btrfs no-holes mode. This patch will correct the judgment and fix the bug. Signed-off-by: Qu Wenruo Signed-off-by: Chris Mason Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6528,7 +6528,7 @@ insert: * extent causing the -EEXIST. */ if (start >= extent_map_end(existing) || - start + len <= existing->start) { + start <= existing->start) { /* * The existing extent map is the one nearest to * the [start, start + len) range which overlaps