f2fs: don't leak filename in f2fs_try_convert_inline_dir()

We need to call fscrypt_free_filename() to free the memory allocated by
fscrypt_setup_filename().

Fixes: b06af2aff2 ("f2fs: convert inline_dir early before starting rename")
Cc: <stable@vger.kernel.org> # v5.6+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/inline.c

@@ -559,12 +559,12 @@ int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
 	ipage = f2fs_get_node_page(sbi, dir->i_ino);
 	if (IS_ERR(ipage)) {
 		err = PTR_ERR(ipage);
-		goto out;
+		goto out_fname;
 	}
 
 	if (f2fs_has_enough_room(dir, ipage, &fname)) {
 		f2fs_put_page(ipage, 1);
-		goto out;
+		goto out_fname;
 	}
 
 	inline_dentry = inline_data_addr(dir, ipage);
@@ -572,6 +572,8 @@ int f2fs_try_convert_inline_dir(struct inode *dir, struct dentry *dentry)
 	err = do_convert_inline_dir(dir, ipage, inline_dentry);
 	if (!err)
 		f2fs_put_page(ipage, 1);
+out_fname:
+	fscrypt_free_filename(&fname);
 out:
 	f2fs_unlock_op(sbi);
 	return err;