linux-kernel - [PATCH 5.19 37/38] RDMA/irdma: Use s/g array in post send only when its valid

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Message-Id: <20220916100450.018144346@linuxfoundation.org>
Date:   Fri, 16 Sep 2022 12:09:11 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sindhu-Devale <sindhu.devale@...el.com>,
        Shiraz Saleem <shiraz.saleem@...el.com>,
        Leon Romanovsky <leon@...nel.org>
Subject: [PATCH 5.19 37/38] RDMA/irdma: Use s/g array in post send only when its valid

From: Sindhu-Devale <sindhu.devale@...el.com>

commit 2c8844431d065ae15a6b442f5769b60aeaaa07af upstream.

Send with invalidate verb call can pass in an
uninitialized s/g array with 0 sge's which is
filled into irdma WQE and causes a HW asynchronous
event.

Fix this by using the s/g array in irdma post send
only when its valid.

Fixes: 551c46e ("RDMA/irdma: Add user/kernel shared libraries")
Signed-off-by: Sindhu-Devale <sindhu.devale@...el.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@...el.com>
Link: https://lore.kernel.org/r/20220906223244.1119-5-shiraz.saleem@intel.com
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/infiniband/hw/irdma/uk.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/infiniband/hw/irdma/uk.c
+++ b/drivers/infiniband/hw/irdma/uk.c
@@ -497,7 +497,8 @@ int irdma_uk_send(struct irdma_qp_uk *qp
 			      FIELD_PREP(IRDMAQPSQ_IMMDATA, info->imm_data));
 		i = 0;
 	} else {
-		qp->wqe_ops.iw_set_fragment(wqe, 0, op_info->sg_list,
+		qp->wqe_ops.iw_set_fragment(wqe, 0,
+					    frag_cnt ? op_info->sg_list : NULL,
 					    qp->swqe_polarity);
 		i = 1;
 	}