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Commit 4e785e8d authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'configfs-for-5.2' of git://git.infradead.org/users/hch/configfs 

Pull configfs update from Christoph Hellwig:

 - a fix for an error path use after free (YueHaibing)

* tag 'configfs-for-5.2' of git://git.infradead.org/users/hch/configfs:
  configfs: fix possible use-after-free in configfs_register_group
parents 27ebbf9d 35399f87

fs/configfs/dir.c

+12 −5
Original line number Diff line number Diff line
@@ -1757,12 +1757,19 @@ int configfs_register_group(struct config_group *parent_group, 


	inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);

	ret = create_default_group(parent_group, group);

	if (!ret) {

	if (ret)

		goto err_out;



	spin_lock(&configfs_dirent_lock);

	configfs_dir_set_ready(group->cg_item.ci_dentry->d_fsdata);

	spin_unlock(&configfs_dirent_lock);

	}

	inode_unlock(d_inode(parent));

	return 0;

err_out:

	inode_unlock(d_inode(parent));

	mutex_lock(&subsys->su_mutex);

	unlink_group(group);

	mutex_unlock(&subsys->su_mutex);

	return ret;

}

EXPORT_SYMBOL(configfs_register_group);