From e2a05339fa1188b6b37540f4611893ac4c534fa2 Mon Sep 17 00:00:00 2001
From: Bob Pearson <rpearsonhpe@gmail.com>
Date: Thu, 29 Jul 2021 17:00:38 -0500
Subject: [PATCH 1/1] RDMA/rxe: Use the correct size of wqe when processing SRQ
Git-commit: e2a05339fa1188b6b37540f4611893ac4c534fa2
Patch-mainline: v5.14
References: git-fixes

The memcpy() that copies a WQE from a SRQ the QP uses an incorrect size.
The size should have been the size of the rxe_send_wqe struct not the size
of a pointer to it. The result is that IO operations using a SRQ on the
responder side will fail.

Fixes: ec0fa2445c18 ("RDMA/rxe: Fix over copying in get_srq_wqe")
Link: https://lore.kernel.org/r/20210729220039.18549-2-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
---
 drivers/infiniband/sw/rxe/rxe_resp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_resp.c b/drivers/infiniband/sw/rxe/rxe_resp.c
index 3743dc39b60c..360ec67cb9e1 100644
--- a/drivers/infiniband/sw/rxe/rxe_resp.c
+++ b/drivers/infiniband/sw/rxe/rxe_resp.c
@@ -318,7 +318,7 @@ static enum resp_states get_srq_wqe(struct rxe_qp *qp)
 		pr_warn("%s: invalid num_sge in SRQ entry\n", __func__);
 		return RESPST_ERR_MALFORMED_WQE;
 	}
-	size = sizeof(wqe) + wqe->dma.num_sge*sizeof(struct rxe_sge);
+	size = sizeof(*wqe) + wqe->dma.num_sge*sizeof(struct rxe_sge);
 	memcpy(&qp->resp.srq_wqe, wqe, size);
 
 	qp->resp.wqe = &qp->resp.srq_wqe.wqe;
-- 
2.35.0