diff options
Diffstat (limited to 'net/ipv4/esp4.c')
| -rw-r--r-- | net/ipv4/esp4.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c index 3968d3f98e08..73981595f062 100644 --- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -349,6 +349,7 @@ static struct ip_esp_hdr *esp_output_udp_encap(struct sk_buff *skb, { struct udphdr *uh; unsigned int len; + struct xfrm_offload *xo = xfrm_offload(skb); len = skb->len + esp->tailen - skb_transport_offset(skb); if (len + sizeof(struct iphdr) > IP_MAX_MTU) @@ -360,7 +361,12 @@ static struct ip_esp_hdr *esp_output_udp_encap(struct sk_buff *skb, uh->len = htons(len); uh->check = 0; - *skb_mac_header(skb) = IPPROTO_UDP; + /* For IPv4 ESP with UDP encapsulation, if xo is not null, the skb is in the crypto offload + * data path, which means that esp_output_udp_encap is called outside of the XFRM stack. + * In this case, the mac header doesn't point to the IPv4 protocol field, so don't set it. + */ + if (!xo || encap_type != UDP_ENCAP_ESPINUDP) + *skb_mac_header(skb) = IPPROTO_UDP; return (struct ip_esp_hdr *)(uh + 1); } |