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From:   Sasha Levin <Alexander.Levin@microsoft.com>
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CC:     Dan Carpenter <dan.carpenter@oracle.com>,
        Jason Gunthorpe <jgg@mellanox.com>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL 4.18 031/136] RDMA/bnxt_re: Fix a bunch of off by one
 bugs in qplib_fp.c
Thread-Topic: [PATCH AUTOSEL 4.18 031/136] RDMA/bnxt_re: Fix a bunch of off by
 one bugs in qplib_fp.c
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Date:   Mon, 17 Sep 2018 03:00:31 +0000
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From: Dan Carpenter <dan.carpenter@oracle.com>

[ Upstream commit c1dfc0114c901b4f46c85ceff0491debf2b2a2ec ]

The srq->swq[] is allocated in bnxt_qplib_create_srq().  It has
srq->hwq.max_elements elements so these tests should be > instead of >=3D
or we might go beyond the end of the array.

Fixes: 1ac5a4047975 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/infiniband/hw/bnxt_re/qplib_fp.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/=
hw/bnxt_re/qplib_fp.c
index 50d8f1fc98d5..e426b990c1dd 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -2354,7 +2354,7 @@ static int bnxt_qplib_cq_process_res_rc(struct bnxt_q=
plib_cq *cq,
 		srq =3D qp->srq;
 		if (!srq)
 			return -EINVAL;
-		if (wr_id_idx > srq->hwq.max_elements) {
+		if (wr_id_idx >=3D srq->hwq.max_elements) {
 			dev_err(&cq->hwq.pdev->dev,
 				"QPLIB: FP: CQ Process RC ");
 			dev_err(&cq->hwq.pdev->dev,
@@ -2369,7 +2369,7 @@ static int bnxt_qplib_cq_process_res_rc(struct bnxt_q=
plib_cq *cq,
 		*pcqe =3D cqe;
 	} else {
 		rq =3D &qp->rq;
-		if (wr_id_idx > rq->hwq.max_elements) {
+		if (wr_id_idx >=3D rq->hwq.max_elements) {
 			dev_err(&cq->hwq.pdev->dev,
 				"QPLIB: FP: CQ Process RC ");
 			dev_err(&cq->hwq.pdev->dev,
@@ -2437,7 +2437,7 @@ static int bnxt_qplib_cq_process_res_ud(struct bnxt_q=
plib_cq *cq,
 		if (!srq)
 			return -EINVAL;
=20
-		if (wr_id_idx > srq->hwq.max_elements) {
+		if (wr_id_idx >=3D srq->hwq.max_elements) {
 			dev_err(&cq->hwq.pdev->dev,
 				"QPLIB: FP: CQ Process UD ");
 			dev_err(&cq->hwq.pdev->dev,
@@ -2452,7 +2452,7 @@ static int bnxt_qplib_cq_process_res_ud(struct bnxt_q=
plib_cq *cq,
 		*pcqe =3D cqe;
 	} else {
 		rq =3D &qp->rq;
-		if (wr_id_idx > rq->hwq.max_elements) {
+		if (wr_id_idx >=3D rq->hwq.max_elements) {
 			dev_err(&cq->hwq.pdev->dev,
 				"QPLIB: FP: CQ Process UD ");
 			dev_err(&cq->hwq.pdev->dev,
@@ -2546,7 +2546,7 @@ static int bnxt_qplib_cq_process_res_raweth_qp1(struc=
t bnxt_qplib_cq *cq,
 				"QPLIB: FP: SRQ used but not defined??");
 			return -EINVAL;
 		}
-		if (wr_id_idx > srq->hwq.max_elements) {
+		if (wr_id_idx >=3D srq->hwq.max_elements) {
 			dev_err(&cq->hwq.pdev->dev,
 				"QPLIB: FP: CQ Process Raw/QP1 ");
 			dev_err(&cq->hwq.pdev->dev,
@@ -2561,7 +2561,7 @@ static int bnxt_qplib_cq_process_res_raweth_qp1(struc=
t bnxt_qplib_cq *cq,
 		*pcqe =3D cqe;
 	} else {
 		rq =3D &qp->rq;
-		if (wr_id_idx > rq->hwq.max_elements) {
+		if (wr_id_idx >=3D rq->hwq.max_elements) {
 			dev_err(&cq->hwq.pdev->dev,
 				"QPLIB: FP: CQ Process Raw/QP1 RQ wr_id ");
 			dev_err(&cq->hwq.pdev->dev,
--=20
2.17.1