From a46f34ba2563425b98bf6c087f8857f64fa8871f Mon Sep 17 00:00:00 2001 From: Bob Pearson Date: Thu, 28 Jan 2021 12:23:02 -0600 Subject: [PATCH] RDMA/rxe: Correct skb on loopback path [ Upstream commit 5120bf0a5fc15dec210a0fe0f39e4a256bb6e349 ] rxe_net.c sends packets at the IP layer with skb->data pointing at the IP header but receives packets from a UDP tunnel with skb->data pointing at the UDP header. On the loopback path this was not correctly accounted for. This patch corrects for this by using sbk_pull() to strip the IP header from the skb on received packets. Fixes: 8700e3e7c485 ("Soft RoCE driver") Link: https://lore.kernel.org/r/20210128182301.16859-1-rpearson@hpe.com Signed-off-by: Bob Pearson Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/sw/rxe/rxe_net.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c index 943914c2a50c..bce44502ab0e 100644 --- a/drivers/infiniband/sw/rxe/rxe_net.c +++ b/drivers/infiniband/sw/rxe/rxe_net.c @@ -414,6 +414,11 @@ int rxe_send(struct rxe_pkt_info *pkt, struct sk_buff *skb) void rxe_loopback(struct sk_buff *skb) { + if (skb->protocol == htons(ETH_P_IP)) + skb_pull(skb, sizeof(struct iphdr)); + else + skb_pull(skb, sizeof(struct ipv6hdr)); + rxe_rcv(skb); }