Since 0cbee99269 user-namespace pull, if a kdbusfs is mounted on a
location that's not created with sysfs_create_mount_point the user
namespaces are not allowed to mount their sysfs instances.
Signed-off-by: Lubomir Rintel <lkund...@v3.sk>
---
Applies on top of char-misc/kdbus a36324913.
ipc/kdbus/main.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/ipc/kdbus/main.c b/ipc/kdbus/main.c
index 1ad4dc8..c2117ea 100644
--- a/ipc/kdbus/main.c
+++ b/ipc/kdbus/main.c
@@ -75,16 +75,13 @@
* 'ยป struct kdbus_ep *ep (owned)
*/
-/* kdbus mount-point /sys/fs/kdbus */
-static struct kobject *kdbus_dir;
-
static int __init kdbus_init(void)
{
int ret;
- kdbus_dir = kobject_create_and_add(KBUILD_MODNAME, fs_kobj);
- if (!kdbus_dir)
- return -ENOMEM;
+ ret = sysfs_create_mount_point(fs_kobj, KBUILD_MODNAME);
+ if (ret)
+ return ret;
ret = kdbus_fs_init();
if (ret < 0) {
@@ -96,14 +93,14 @@ static int __init kdbus_init(void)
return 0;
exit_dir:
- kobject_put(kdbus_dir);
+ sysfs_remove_mount_point(fs_kobj, KBUILD_MODNAME);
return ret;
}
static void __exit kdbus_exit(void)
{
kdbus_fs_exit();
- kobject_put(kdbus_dir);
+ sysfs_remove_mount_point(fs_kobj, KBUILD_MODNAME);
ida_destroy(&kdbus_node_ida);
}
--
2.4.3
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