Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754043AbaKFXOz (ORCPT ); Thu, 6 Nov 2014 18:14:55 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:58654 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752284AbaKFWk2 (ORCPT ); Thu, 6 Nov 2014 17:40:28 -0500 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Jan Kara , "Theodore Ts'o" , Kamal Mostafa Subject: [PATCH 3.13 155/162] ext4: bail out from make_indexed_dir() on first error Date: Thu, 6 Nov 2014 14:36:59 -0800 Message-Id: <1415313426-9622-156-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1415313426-9622-1-git-send-email-kamal@canonical.com> References: <1415313426-9622-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11.11 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Jan Kara commit 6050d47adcadbb53582434d919ed7f038d936712 upstream. When ext4_handle_dirty_dx_node() or ext4_handle_dirty_dirent_node() fail, there's really something wrong with the fs and there's no point in continuing further. Just return error from make_indexed_dir() in that case. Also initialize frames array so that if we return early due to error, dx_release() doesn't try to dereference uninitialized memory (which could happen also due to error in do_split()). Coverity-id: 741300 Signed-off-by: Jan Kara Signed-off-by: Theodore Ts'o [ kamal: backport to 3.13-stable: context ] Signed-off-by: Kamal Mostafa --- fs/ext4/namei.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 08de398..c8fd7ce 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -1829,31 +1829,39 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry, hinfo.hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned; hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed; ext4fs_dirhash(name, namelen, &hinfo); + memset(frames, 0, sizeof(frames)); frame = frames; frame->entries = entries; frame->at = entries; frame->bh = bh; bh = bh2; - ext4_handle_dirty_dx_node(handle, dir, frame->bh); - ext4_handle_dirty_dirent_node(handle, dir, bh); + retval = ext4_handle_dirty_dx_node(handle, dir, frame->bh); + if (retval) + goto out_frames; + retval = ext4_handle_dirty_dirent_node(handle, dir, bh); + if (retval) + goto out_frames; de = do_split(handle,dir, &bh, frame, &hinfo, &retval); if (!de) { - /* - * Even if the block split failed, we have to properly write - * out all the changes we did so far. Otherwise we can end up - * with corrupted filesystem. - */ - ext4_mark_inode_dirty(handle, dir); - dx_release(frames); - return retval; + retval = PTR_ERR(de); + goto out_frames; } dx_release(frames); retval = add_dirent_to_buf(handle, dentry, inode, de, bh); brelse(bh); return retval; +out_frames: + /* + * Even if the block split failed, we have to properly write + * out all the changes we did so far. Otherwise we can end up + * with corrupted filesystem. + */ + ext4_mark_inode_dirty(handle, dir); + dx_release(frames); + return retval; } /* -- 1.9.1 -- 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/