4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Inbar Karmy <inb...@mellanox.com>
[ Upstream commit ef7a3518f7dd4f4cf5e5b5358c93d1eb78df28fb ]
When GRO is off, the transport header pointer in sk_buff is
initialized to network's header.
To find the udp header, instead of using udp_hdr() which assumes
skb_network_header was set, manually calculate the udp header offset.
Fixes: 0952da791c97 ("net/mlx5e: Add support for loopback selftest")
Signed-off-by: Inbar Karmy <inb...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c
@@ -216,7 +216,8 @@ mlx5e_test_loopback_validate(struct sk_b
if (iph->protocol != IPPROTO_UDP)
goto out;
- udph = udp_hdr(skb);
+ /* Don't assume skb_transport_header() was set */
+ udph = (struct udphdr *)((u8 *)iph + 4 * iph->ihl);
if (udph->dest != htons(9))
goto out;
