linux-ext4 - [PATCH 06/28] ext4: ea_inode owner should be the same as the inode owner

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 31 May 2017 01:14:55 -0700
From:   Tahsin Erdogan <tahsin@...gle.com>
To:     Jan Kara <jack@...e.com>, Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Dave Kleikamp <shaggy@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Mark Fasheh <mfasheh@...sity.com>,
        Joel Becker <jlbec@...lplan.org>, Jens Axboe <axboe@...com>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        Mike Christie <mchristi@...hat.com>,
        Fabian Frederick <fabf@...net.be>, linux-ext4@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, jfs-discussion@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, ocfs2-devel@....oracle.com,
        reiserfs-devel@...r.kernel.org, Tahsin Erdogan <tahsin@...gle.com>
Subject: [PATCH 06/28] ext4: ea_inode owner should be the same as the inode owner

Quota charging is based on the ownership of the inode. Currently, the
xattr inode owner is set to the caller which may be different from the
parent inode owner. This is inconsistent with how quota is charged for
xattr block and regular data block writes.

Signed-off-by: Tahsin Erdogan <tahsin@...gle.com>
---
 fs/ext4/xattr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 8e123533315f..32ad2f2870e9 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -826,6 +826,7 @@ static struct inode *ext4_xattr_inode_create(handle_t *handle,
 					     struct inode *inode)
 {
 	struct inode *ea_inode = NULL;
+	uid_t owner[2] = { i_uid_read(inode), i_gid_read(inode) };
 	int err;
 
 	/*
@@ -833,7 +834,7 @@ static struct inode *ext4_xattr_inode_create(handle_t *handle,
 	 * in the same group, or nearby one.
 	 */
 	ea_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode,
-				  S_IFREG | 0600, NULL, inode->i_ino + 1, NULL,
+				  S_IFREG | 0600, NULL, inode->i_ino + 1, owner,
 				  EXT4_EA_INODE_FL);
 	if (!IS_ERR(ea_inode)) {
 		ea_inode->i_op = &ext4_file_inode_operations;
-- 
2.13.0.219.gdb65acc882-goog