From: Alice Mikityanska Similar to commit add641e7dee3 ("sched: act_csum: don't mangle TCP and UDP GSO packets"), UDP tunnel GSO packets going through act_csum shouldn't have their checksum calculated at this point, because it will be done after segmentation. Setting the checksum in act_csum modifies skb->ip_summed and prevents inner IP csum offload from kicking in, resulting in a packet with a bad checksum. Add UDP tunnel GSO packets to the exceptions, and also add UDP GSO (SKB_GSO_UDP_L4), as the same logic as in the commit mentioned above applies to UDP GSO too. Signed-off-by: Alice Mikityanska --- net/sched/act_csum.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c index 213e1ce9d2da..a5cc76613f32 100644 --- a/net/sched/act_csum.c +++ b/net/sched/act_csum.c @@ -259,7 +259,9 @@ static int tcf_csum_ipv4_udp(struct sk_buff *skb, unsigned int ihl, const struct iphdr *iph; u16 ul; - if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_UDP) + if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & + (SKB_GSO_UDP | SKB_GSO_UDP_L4 | + SKB_GSO_UDP_TUNNEL | SKB_GSO_UDP_TUNNEL_CSUM)) return 1; /* @@ -315,7 +317,9 @@ static int tcf_csum_ipv6_udp(struct sk_buff *skb, unsigned int ihl, const struct ipv6hdr *ip6h; u16 ul; - if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & SKB_GSO_UDP) + if (skb_is_gso(skb) && skb_shinfo(skb)->gso_type & + (SKB_GSO_UDP | SKB_GSO_UDP_L4 | + SKB_GSO_UDP_TUNNEL | SKB_GSO_UDP_TUNNEL_CSUM)) return 1; /* -- 2.52.0