linux-kernel - [PATCH 4.18 029/228] RDMA/bnxt_re: Fix a couple off by one bugs

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Message-Id: <20181002132501.049995351@linuxfoundation.org>
Date:   Tue,  2 Oct 2018 06:22:06 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Selvin Xavier <selvin.xavier@...adcom.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 029/228] RDMA/bnxt_re: Fix a couple off by one bugs

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit 474e5a86067e5f12c97d1db8b170c7f45b53097a ]

The sgid_tbl->tbl[] array is allocated in bnxt_qplib_alloc_sgid_tbl().
It has sgid_tbl->max elements.  So the > should be >= to prevent
accessing one element beyond the end of the array.

Fixes: 1ac5a4047975 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Selvin Xavier <selvin.xavier@...adcom.com>
Signed-off-by: Jason Gunthorpe <jgg@...lanox.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/infiniband/hw/bnxt_re/qplib_sp.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
@@ -197,7 +197,7 @@ int bnxt_qplib_get_sgid(struct bnxt_qpli
 			struct bnxt_qplib_sgid_tbl *sgid_tbl, int index,
 			struct bnxt_qplib_gid *gid)
 {
-	if (index > sgid_tbl->max) {
+	if (index >= sgid_tbl->max) {
 		dev_err(&res->pdev->dev,
 			"QPLIB: Index %d exceeded SGID table max (%d)",
 			index, sgid_tbl->max);
@@ -402,7 +402,7 @@ int bnxt_qplib_get_pkey(struct bnxt_qpli
 		*pkey = 0xFFFF;
 		return 0;
 	}
-	if (index > pkey_tbl->max) {
+	if (index >= pkey_tbl->max) {
 		dev_err(&res->pdev->dev,
 			"QPLIB: Index %d exceeded PKEY table max (%d)",
 			index, pkey_tbl->max);