[PATCH AUTOSEL 4.18 031/136] RDMA/bnxt_re: Fix a bunch of off by one bugs in qplib_fp.c

[Sasha Levin]

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

[ 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 >=
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@xxxxxxxxxx>
Acked-by: Selvin Xavier <selvin.xavier@xxxxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
 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_qplib_cq *cq,
 		srq = qp->srq;
 		if (!srq)
 			return -EINVAL;
-		if (wr_id_idx > srq->hwq.max_elements) {
+		if (wr_id_idx >= 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_qplib_cq *cq,
 		*pcqe = cqe;
 	} else {
 		rq = &qp->rq;
-		if (wr_id_idx > rq->hwq.max_elements) {
+		if (wr_id_idx >= 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_qplib_cq *cq,
 		if (!srq)
 			return -EINVAL;
 
-		if (wr_id_idx > srq->hwq.max_elements) {
+		if (wr_id_idx >= 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_qplib_cq *cq,
 		*pcqe = cqe;
 	} else {
 		rq = &qp->rq;
-		if (wr_id_idx > rq->hwq.max_elements) {
+		if (wr_id_idx >= 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(struct 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 >= 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(struct bnxt_qplib_cq *cq,
 		*pcqe = cqe;
 	} else {
 		rq = &qp->rq;
-		if (wr_id_idx > rq->hwq.max_elements) {
+		if (wr_id_idx >= 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,
-- 
2.17.1