configfs: add missing mutex_unlock()
d_alloc() failure in configfs_register_subsystem() would fail to unlock
the mutex taken above. Reorganize the exit path to ensure the unlock
happens.
Reported-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 34750d5..5e6e37e 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1141,25 +1141,22 @@
err = -ENOMEM;
dentry = d_alloc(configfs_sb->s_root, &name);
- if (!dentry)
- goto out_release;
+ if (dentry) {
+ d_add(dentry, NULL);
- d_add(dentry, NULL);
-
- err = configfs_attach_group(sd->s_element, &group->cg_item,
- dentry);
- if (!err)
- dentry = NULL;
- else
- d_delete(dentry);
+ err = configfs_attach_group(sd->s_element, &group->cg_item,
+ dentry);
+ if (err) {
+ d_delete(dentry);
+ dput(dentry);
+ }
+ }
mutex_unlock(&configfs_sb->s_root->d_inode->i_mutex);
- if (dentry) {
- dput(dentry);
-out_release:
- unlink_group(group);
- configfs_release_fs();
+ if (err) {
+ unlink_group(group);
+ configfs_release_fs();
}
return err;