diff options
Diffstat (limited to 'include/net/udp.h')
| -rw-r--r-- | include/net/udp.h | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/include/net/udp.h b/include/net/udp.h index a772510b2aa5..e2af3bda90c9 100644 --- a/include/net/udp.h +++ b/include/net/udp.h @@ -205,7 +205,6 @@ static inline void udp_hash4_dec(struct udp_hslot *hslot2) extern struct proto udp_prot; -extern atomic_long_t udp_memory_allocated; DECLARE_PER_CPU(int, udp_memory_per_cpu_fw_alloc); /* sysctl variables for udp */ @@ -587,6 +586,16 @@ static inline struct sk_buff *udp_rcv_segment(struct sock *sk, { netdev_features_t features = NETIF_F_SG; struct sk_buff *segs; + int drop_count; + + /* + * Segmentation in UDP receive path is only for UDP GRO, drop udp + * fragmentation offload (UFO) packets. + */ + if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP) { + drop_count = 1; + goto drop; + } /* Avoid csum recalculation by skb_segment unless userspace explicitly * asks for the final checksum values @@ -610,16 +619,18 @@ static inline struct sk_buff *udp_rcv_segment(struct sock *sk, */ segs = __skb_gso_segment(skb, features, false); if (IS_ERR_OR_NULL(segs)) { - int segs_nr = skb_shinfo(skb)->gso_segs; - - atomic_add(segs_nr, &sk->sk_drops); - SNMP_ADD_STATS(__UDPX_MIB(sk, ipv4), UDP_MIB_INERRORS, segs_nr); - kfree_skb(skb); - return NULL; + drop_count = skb_shinfo(skb)->gso_segs; + goto drop; } consume_skb(skb); return segs; + +drop: + atomic_add(drop_count, &sk->sk_drops); + SNMP_ADD_STATS(__UDPX_MIB(sk, ipv4), UDP_MIB_INERRORS, drop_count); + kfree_skb(skb); + return NULL; } static inline void udp_post_segment_fix_csum(struct sk_buff *skb) |