In recv_tt_query(), 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 | 7 +++---- 1 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/routing.c b/routing.c index 3a3cfb8..fc8eb87 100644 --- a/routing.c +++ b/routing.c @@ -1194,7 +1194,6 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if) struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface); struct tt_query_packet *tt_query; 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 tt_query_packet)))) @@ -1248,11 +1247,11 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if) } break; } - ret = NET_RX_SUCCESS;
out: - kfree_skb(skb); - return ret; + /* returning NET_RX_DROP will make the caller function to kfree the + * skb */ + return NET_RX_DROP; }
int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if)