linux-kernel - [PATCH net-next] sysfs: Fix regression when adding a file to an existing group

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Date:   Fri, 27 Jul 2018 21:33:27 +0000
From:   Tyler Hicks <tyhicks@...onical.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next] sysfs: Fix regression when adding a file to an existing group

Commit 5f81880d5204 ("sysfs, kobject: allow creating kobject belonging
to arbitrary users") incorrectly changed the argument passed as the
parent parameter when calling sysfs_add_file_mode_ns(). This caused some
sysfs attribute files to not be added correctly to certain groups.

Fixes: 5f81880d5204 ("sysfs, kobject: allow creating kobject belonging to arbitrary users")
Signed-off-by: Tyler Hicks <tyhicks@...onical.com>
Reported-by: Heiner Kallweit <hkallweit1@...il.com>
---

Note, this was a regression exclusively in linux-next and never made it to
Linus' tree. There's no need to queue it up for linux-stable.

 fs/sysfs/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index fa46216523cf..052e5ad9a4d2 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -373,7 +373,7 @@ int sysfs_add_file_to_group(struct kobject *kobj,
 		return -ENOENT;
 
 	kobject_get_ownership(kobj, &uid, &gid);
-	error = sysfs_add_file_mode_ns(kobj->sd, attr, false,
+	error = sysfs_add_file_mode_ns(parent, attr, false,
 				       attr->mode, uid, gid, NULL);
 	kernfs_put(parent);
 
-- 
2.7.4