linux-kernel - [PATCH 3.16 020/129] IB/usnic: Fix out of bounds index check in query pkey

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Message-ID: <lsq.1562518457.886741339@decadent.org.uk>
Date:   Sun, 07 Jul 2019 17:54:17 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Gal Pressman" <galpress@...zon.com>,
        "Jason Gunthorpe" <jgg@...lanox.com>,
        "Parvi Kaustubhi" <pkaustub@...co.com>
Subject: [PATCH 3.16 020/129] IB/usnic: Fix out of bounds index check in
 query pkey

3.16.70-rc1 review patch.  If anyone has any objections, please let me know.

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

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

commit 4959d5da5737dd804255c75b8cea0a2929ce279a upstream.

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: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
+++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
@@ -410,7 +410,7 @@ int usnic_ib_query_gid(struct ib_device
 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;