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

[Markus Elfring]

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>
---
 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