esp: check the NETIF_F_HW_ESP_TX_CSUM bit before segmenting
If I understand correctly, we should not be asking for a
checksum offload on an ipsec packet if the netdev isn't
advertising NETIF_F_HW_ESP_TX_CSUM. In that case, we should
clear the NETIF_F_CSUM_MASK bits.
Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/net/ipv4/esp4_offload.c b/net/ipv4/esp4_offload.c
index da5635f..7cf755e 100644
--- a/net/ipv4/esp4_offload.c
+++ b/net/ipv4/esp4_offload.c
@@ -138,6 +138,8 @@ static struct sk_buff *esp4_gso_segment(struct sk_buff *skb,
if (!(features & NETIF_F_HW_ESP) || !x->xso.offload_handle ||
(x->xso.dev != skb->dev))
esp_features = features & ~(NETIF_F_SG | NETIF_F_CSUM_MASK);
+ else if (!(features & NETIF_F_HW_ESP_TX_CSUM))
+ esp_features = features & ~NETIF_F_CSUM_MASK;
xo->flags |= XFRM_GSO_SEGMENT;