# Re: netlink: Add netlink\_bound helper and use it in netlink\_getname

- From: Tejun Heo \<tj@kernel.org\>
- Date: 2015-09-26 19:52:51 
- List: netdev
- Page: https://ratatoskr.run/netdev/2015/09/4584094
- Thread: https://ratatoskr.run/netdev/2015/09/4577436/t.md

```text
Hello,

On Sun, Sep 27, 2015 at 03:49:16AM +0800, Herbert Xu wrote:
> If the autobind is not complete then netlink_getname must return
> zero rather than some garbage portid that belongs to somebody
> else's socket.  That's what we did before any of this lockless
> code was introduced.
> 
> If you don't check nlk->bound then you may return garbage.

Ah, yeah, you're right.  We need to check that there because it may
contain a garbage value.  I still think it'd better to use
netlink_bound() test in connect() too tho.

Thanks.

-- 
tejun
```