Re: [PATCH net-next 3/4] netconsole: reject enabling a target with no remote IP address

[Breno Leitao]

On Wed, Aug 05, 2026 at 10:33:03PM +0100, Gustavo Luiz Duarte wrote:
> The command-line path already requires a remote address, but if a user
> creates a dynamic target and enables it without setting a remote
> address, we currently try sending netconsole traffic to "0.0.0.0".
> 
> Refuse to enable a target if the remote address is unset.
> 
> Signed-off-by: Gustavo Luiz Duarte <gustavold@xxxxxxxxx>
> ---
>  drivers/net/netconsole.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
> index 070bae7b4fd7..a41b0a5ce64f 100644
> --- a/drivers/net/netconsole.c
> +++ b/drivers/net/netconsole.c
> @@ -471,6 +471,12 @@ static int netcons_netpoll_setup(struct netconsole_target *nt)
>  	int err;
>  
>  	rtnl_lock();
> +	if (nt->remote_ip.family == AF_UNSPEC) {
> +		np_err(np, "remote IP address not configured, aborting\n");
> +		err = -EDESTADDRREQ;
> +		goto unlock;
> +	}

Why not doing it  before the rtnl lock?