diff options
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 14a83f2035b9..831129f2a69b 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -3769,6 +3769,22 @@ static netdev_features_t dflt_features_check(struct sk_buff *skb, return vlan_features_check(skb, features); } +static bool skb_gso_has_extension_hdr(const struct sk_buff *skb) +{ + if (!skb->encapsulation) + return ((skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6 || + (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4 && + vlan_get_protocol(skb) == htons(ETH_P_IPV6))) && + skb_transport_header_was_set(skb) && + skb_network_header_len(skb) != sizeof(struct ipv6hdr)); + else + return (!skb_inner_network_header_was_set(skb) || + ((skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6 || + (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4 && + inner_ip_hdr(skb)->version == 6)) && + skb_inner_network_header_len(skb) != sizeof(struct ipv6hdr))); +} + static netdev_features_t gso_features_check(const struct sk_buff *skb, struct net_device *dev, netdev_features_t features) @@ -3805,10 +3821,15 @@ static netdev_features_t gso_features_check(const struct sk_buff *skb, * segmentation-offloads.rst). */ if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) { - struct iphdr *iph = skb->encapsulation ? - inner_ip_hdr(skb) : ip_hdr(skb); + const struct iphdr *iph; + struct iphdr _iph; + int nhoff = skb->encapsulation ? + skb_inner_network_offset(skb) : + skb_network_offset(skb); + + iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph); - if (!(iph->frag_off & htons(IP_DF))) + if (!iph || !(iph->frag_off & htons(IP_DF))) features &= ~dev->mangleid_features; } @@ -3816,11 +3837,7 @@ static netdev_features_t gso_features_check(const struct sk_buff *skb, * so neither does TSO that depends on it. */ if (features & NETIF_F_IPV6_CSUM && - (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6 || - (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4 && - vlan_get_protocol(skb) == htons(ETH_P_IPV6))) && - skb_transport_header_was_set(skb) && - skb_network_header_len(skb) != sizeof(struct ipv6hdr)) + skb_gso_has_extension_hdr(skb)) features &= ~(NETIF_F_IPV6_CSUM | NETIF_F_TSO6 | NETIF_F_GSO_UDP_L4); return features; |