From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BF137C46467 for ; Mon, 16 Jan 2023 16:44:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233749AbjAPQov (ORCPT ); Mon, 16 Jan 2023 11:44:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233760AbjAPQo3 (ORCPT ); Mon, 16 Jan 2023 11:44:29 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56FCA3F2AF for ; Mon, 16 Jan 2023 08:31:54 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 9006EB81060 for ; Mon, 16 Jan 2023 16:31:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DF9AFC433D2; Mon, 16 Jan 2023 16:31:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673886712; bh=yfWE6JRUawIW7xITywdhSwf+oQaEeQJfr9+IrWrjF+U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cDVDjWpc2hDsDmO+/jEZaaRWFMPiXdvFyf+gcPhrrKbjPxi5koSoT/+pUD6Oz5fY6 T7XIEf5hRiniSPmlIQQHZSD9MNH0goEJjatEu5/QriiRuxybV1gA47kL/Losym/3eD Vg/18qj8oGqttB6tuzIP6xi+PO2t2G8xAxzYgGTM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ye Bin , Jan Kara , Theodore Tso , stable@kernel.org Subject: [PATCH 5.4 533/658] ext4: fix inode leak in ext4_xattr_inode_create() on an error path Date: Mon, 16 Jan 2023 16:50:21 +0100 Message-Id: <20230116154933.929867917@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154909.645460653@linuxfoundation.org> References: <20230116154909.645460653@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ye Bin commit e4db04f7d3dbbe16680e0ded27ea2a65b10f766a upstream. There is issue as follows when do setxattr with inject fault: [localhost]# fsck.ext4 -fn /dev/sda e2fsck 1.46.6-rc1 (12-Sep-2022) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Unattached zero-length inode 15. Clear? no Unattached inode 15 Connect to /lost+found? no Pass 5: Checking group summary information /dev/sda: ********** WARNING: Filesystem still has errors ********** /dev/sda: 15/655360 files (0.0% non-contiguous), 66755/2621440 blocks This occurs in 'ext4_xattr_inode_create()'. If 'ext4_mark_inode_dirty()' fails, dropping i_nlink of the inode is needed. Or will lead to inode leak. Signed-off-by: Ye Bin Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20221208023233.1231330-5-yebin@huaweicloud.com Signed-off-by: Theodore Ts'o Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman --- fs/ext4/xattr.c | 3 +++ 1 file changed, 3 insertions(+) --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -1442,6 +1442,9 @@ static struct inode *ext4_xattr_inode_cr if (!err) err = ext4_inode_attach_jinode(ea_inode); if (err) { + if (ext4_xattr_inode_dec_ref(handle, ea_inode)) + ext4_warning_inode(ea_inode, + "cleanup dec ref error %d", err); iput(ea_inode); return ERR_PTR(err); }