[PATCH for-rc v2 3/8] RDMA/bnxt_re: Validate num_sge in bnxt_re_post_srq_recv()

[Selvin Xavier <selvin.xavier@broadcom.com>]

Add a check if max sge for SRQ is exceeding the device
maximum.

Fixes: 37cb11acf1f7 ("RDMA/bnxt_re: Add SRQ support for Broadcom adapters")
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/infiniband/hw/bnxt_re/ib_verbs.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index e56830a669bf..ab9d4d6bf5b0 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -2389,6 +2389,13 @@ int bnxt_re_post_srq_recv(struct ib_srq *ib_srq, const struct ib_recv_wr *wr,
 	while (wr) {
 		/* Transcribe each ib_recv_wr to qplib_swqe */
 		wqe.num_sge = wr->num_sge;
+		if (wr->num_sge > srq->qplib_srq.max_sge) {
+			ibdev_err(&srq->rdev->ibdev,
+				  "Limit exceeded for SRQ Receive SGEs");
+			rc = -EINVAL;
+			*bad_wr = wr;
+			break;
+		}
 		bnxt_re_build_sgl(wr->sg_list, wqe.sg_list, wr->num_sge);
 		wqe.wr_id = wr->wr_id;
 		wqe.type = BNXT_QPLIB_SWQE_TYPE_RECV;
-- 
2.39.3