linux-kernel - [PATCH 4.19 124/639] IB/usnic: Fix out of bounds index check in query pkey

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Message-Id: <20200124093102.835711596@linuxfoundation.org>
Date:   Fri, 24 Jan 2020 10:24:54 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Gal Pressman <galpress@...zon.com>,
        Parvi Kaustubhi <pkaustub@...co.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 124/639] IB/usnic: Fix out of bounds index check in query pkey

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

[ Upstream commit 4959d5da5737dd804255c75b8cea0a2929ce279a ]

The pkey table size is one element, index should be tested for > 0 instead
of > 1.

Fixes: e3cf00d0a87f ("IB/usnic: Add Cisco VIC low-level hardware driver")
Signed-off-by: Gal Pressman <galpress@...zon.com>
Acked-by: Parvi Kaustubhi <pkaustub@...co.com>
Signed-off-by: Jason Gunthorpe <jgg@...lanox.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
index 3db232429630e..e611f133aa97b 100644
--- a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
+++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
@@ -447,7 +447,7 @@ struct net_device *usnic_get_netdev(struct ib_device *device, u8 port_num)
 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 				u16 *pkey)
 {
-	if (index > 1)
+	if (index > 0)
 		return -EINVAL;
 
 	*pkey = 0xffff;
-- 
2.20.1