From 5120bf0a5fc15dec210a0fe0f39e4a256bb6e349 Mon Sep 17 00:00:00 2001
From: Bob Pearson <rpearsonhpe@gmail.com>
Date: Thu, 28 Jan 2021 12:23:02 -0600
Subject: [PATCH 1/1] RDMA/rxe: Correct skb on loopback path
Git-commit: 5120bf0a5fc15dec210a0fe0f39e4a256bb6e349
Patch-mainline: v5.12
References: git-fixes
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 <rpearson@hpe.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
---
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 c4b06ced30a7..0d4125b867b7 100644
--- a/drivers/infiniband/sw/rxe/rxe_net.c
+++ b/drivers/infiniband/sw/rxe/rxe_net.c
@@ -408,6 +408,11 @@ 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);
}
--
2.31.1.5.g533053588dc3