linux-kernel - [PATCH AUTOSEL 4.14 052/371] RDMA/qedr: Fix out of bounds index check in query pkey

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Date:   Thu, 16 Jan 2020 12:12:00 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Gal Pressman <galpress@...zon.com>,
        Michal Kalderon <michal.kalderon@...vell.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Sasha Levin <sashal@...nel.org>, linux-rdma@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14 052/371] RDMA/qedr: Fix out of bounds index check in query pkey

From: Gal Pressman <galpress@...zon.com>

[ Upstream commit dbe30dae487e1a232158c24b432d45281c2805b7 ]

The pkey table size is QEDR_ROCE_PKEY_TABLE_LEN, index should be tested
for >= QEDR_ROCE_PKEY_TABLE_LEN instead of > QEDR_ROCE_PKEY_TABLE_LEN.

Fixes: a7efd7773e31 ("qedr: Add support for PD,PKEY and CQ verbs")
Signed-off-by: Gal Pressman <galpress@...zon.com>
Acked-by: Michal Kalderon <michal.kalderon@...vell.com>
Signed-off-by: Jason Gunthorpe <jgg@...lanox.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/hw/qedr/verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 656e7c1a4449..8bfe9073da78 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -63,7 +63,7 @@ static inline int qedr_ib_copy_to_udata(struct ib_udata *udata, void *src,
 
 int qedr_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
 {
-	if (index > QEDR_ROCE_PKEY_TABLE_LEN)
+	if (index >= QEDR_ROCE_PKEY_TABLE_LEN)
 		return -EINVAL;
 
 	*pkey = QEDR_ROCE_PKEY_DEFAULT;
-- 
2.20.1