diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index ebc15b0ae922..e5239b7fc5fd 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1753,7 +1753,8 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, int skb_len = skb->len; unsigned int snaplen, res; unsigned long status = TP_STATUS_USER; - unsigned short macoff, netoff, hdrlen; + unsigned short macoff, hdrlen; + unsigned int netoff; struct sk_buff *copy_skb = NULL; struct timespec ts; __u32 ts_status; @@ -1800,6 +1801,12 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, po->tp_reserve; macoff = netoff - maclen; } + if (netoff > USHRT_MAX) { + spin_lock(&sk->sk_receive_queue.lock); + po->stats.stats1.tp_drops++; + spin_unlock(&sk->sk_receive_queue.lock); + goto drop_n_restore; + } if (po->tp_version <= TPACKET_V2) { if (macoff + snaplen > po->rx_ring.frame_size) { if (po->copy_thresh &&