In recv_roam_adv(), in case of error the skb is freed and then NET_RX_DROP is returned. This makes the caller function wrongly invoke kfree_skb() again. To avoid this double free recv_tt_query() has to always return NET_RX_DROP and not to free the skb.
Signed-off-by: Antonio Quartulli ordex@autistici.org --- routing.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/routing.c b/routing.c index 2222288..0ce090c 100644 --- a/routing.c +++ b/routing.c @@ -1259,7 +1259,6 @@ int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if) struct roam_adv_packet *roam_adv_packet; struct orig_node *orig_node; struct ethhdr *ethhdr; - int ret = NET_RX_DROP;
/* drop packet if it has not necessary minimum size */ if (unlikely(!pskb_may_pull(skb, sizeof(struct roam_adv_packet)))) @@ -1297,10 +1296,9 @@ int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if) bat_priv->tt_poss_change = true;
orig_node_free_ref(orig_node); - ret = NET_RX_SUCCESS; out: - kfree(skb); - return ret; + /* returning NET_RX_DROP will make the caller function kfree the skb */ + return NET_RX_DROP; }
/* find a suitable router for this originator, and use