The memory of struct fuse_file is allocated but not freed
when get_create_ext return error.

Fixes: 3e2b6fdb ("fuse: send security context of inode on file")
Cc: stable@vger.kernel.org # v5.17
Signed-off-by: yangyun <yangyun50@huawei.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>