[PATCH batadv] batman-adv: frag: fix primary_if leak on failed linearization

If the skb has a frag_list, it must be linearized before it can be split
using skb_split(). But when this step failed, it must not only free the skb
but also take care of the reference to the already found primary_if.

Reported-by: Sashiko <[email protected]>
Fixes: d467720acaf1 ("batman-adv: Don't skb_split skbuffs with frag_list")
Signed-off-by: Sven Eckelmann <[email protected]>
---
 net/batman-adv/fragmentation.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c
index e2c74ae6..5606e284 100644
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -551,7 +551,7 @@ int batadv_frag_send_packet(struct sk_buff *skb,
 	 */
 	if (skb_has_frag_list(skb) && __skb_linearize(skb)) {
 		ret = -ENOMEM;
-		goto free_skb;
+		goto put_primary_if;
 	}
 
 	/* Create one header to be copied to all fragments */

---
base-commit: 22b12d005035f37f898e5bf80480719fe1ef4fba
change-id: 20260703-frag-tx-primary-leak-6c2ad9f844a3

Best regards,
--  
Sven Eckelmann <[email protected]>