Re: [PATCH 1/2] batman-adv: Return directly after a failed batadv_dat_select_candidates() in batadv_dat_forward_data()

[Sven Eckelmann]

On Tuesday, 2 January 2024 08:11:47 CET Markus Elfring wrote:
> From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
> Date: Tue, 2 Jan 2024 07:27:45 +0100
> 
> The kfree() function was called in one case by
> the batadv_dat_forward_data() function during error handling
> even if the passed variable contained a null pointer.
> This issue was detected by using the Coccinelle software.
> 
> * Thus return directly after a batadv_dat_select_candidates() call failed
>   at the beginning.
> 
> * Delete the label “out” which became unnecessary with this refactoring.
> 
> Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>

Acked-by: Sven Eckelmann <sven@xxxxxxxxxxxxx>

> ---
>  net/batman-adv/distributed-arp-table.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
> index 28a939d56090..4c7e85534324 100644
> --- a/net/batman-adv/distributed-arp-table.c
> +++ b/net/batman-adv/distributed-arp-table.c
> @@ -684,7 +684,7 @@ static bool batadv_dat_forward_data(struct batadv_priv *bat_priv,
> 
>  	cand = batadv_dat_select_candidates(bat_priv, ip, vid);
>  	if (!cand)
> -		goto out;
> +		return ret;
> 
>  	batadv_dbg(BATADV_DBG_DAT, bat_priv, "DHT_SEND for %pI4\n", &ip);
> 
> @@ -728,7 +728,6 @@ static bool batadv_dat_forward_data(struct batadv_priv *bat_priv,
>  		batadv_orig_node_put(cand[i].orig_node);
>  	}
> 
> -out:
>  	kfree(cand);
>  	return ret;
>  }
> --
> 2.43.0
> 
>

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