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, Josef Bacik , Chris Mason Subject: [PATCH 3.14 100/110] Btrfs: dont check nodes for extent items Date: Sat, 28 Jun 2014 10:47:37 -0700 Message-Id: <20140628174551.351303918@linuxfoundation.org> In-Reply-To: <20140628174545.354748696@linuxfoundation.org> References: <20140628174545.354748696@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Josef Bacik commit 8a56457f5f8fa7c2698ffae8545214c5b96a2cb5 upstream. The backref code was looking at nodes as well as leaves when we tried to populate extent item entries. This is not good, and although we go away with it for the most part because we'd skip where disk_bytenr != random_memory, sometimes random_memory would match and suddenly boom. This fixes that problem. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/backref.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -972,11 +972,12 @@ again: goto out; } if (ref->count && ref->parent) { - if (extent_item_pos && !ref->inode_list) { + if (extent_item_pos && !ref->inode_list && + ref->level == 0) { u32 bsz; struct extent_buffer *eb; bsz = btrfs_level_size(fs_info->extent_root, - info_level); + ref->level); eb = read_tree_block(fs_info->extent_root, ref->parent, bsz, 0); if (!eb || !extent_buffer_uptodate(eb)) {