linux-kernel - [PATCH 1/2] dt-bindings: phy: Update SERDES_MAX to be SERDES

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Message-ID: <3a1a95a4832af33dcd1842b0298d257bbcf1f5ab.1539036280.git.gustavo@embeddedor.com>
Date:   Tue, 9 Oct 2018 00:21:36 +0200
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     linux-kernel@...r.kernel.org,
        Quentin Schulz <quentin.schulz@...tlin.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        devicetree@...r.kernel.org
Subject: [PATCH 1/2] dt-bindings: phy: Update SERDES_MAX to be SERDES_MAX + 1

SERDES_MAX is a valid value to index ctrl->phys in
drivers/phy/mscc/phy-ocelot-serdes.c. But, currently,
there is an out-of-bounds bug in the mentioned driver
when reading from ctrl->phys, because the size of
array ctrl->phys is SERDES_MAX.

Partially fix this by updating SERDES_MAX to be SERDES6G_MAX + 1.

Notice that this is the first part of the solution to
the out-of-bounds bug mentioned above. Although this
change is not dependent on any other one.

Suggested-by: Quentin Schulz <quentin.schulz@...tlin.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 include/dt-bindings/phy/phy-ocelot-serdes.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/dt-bindings/phy/phy-ocelot-serdes.h b/include/dt-bindings/phy/phy-ocelot-serdes.h
index bd28f21..fe70ada 100644
--- a/include/dt-bindings/phy/phy-ocelot-serdes.h
+++ b/include/dt-bindings/phy/phy-ocelot-serdes.h
@@ -7,6 +7,6 @@
 #define SERDES1G_MAX	SERDES1G(5)
 #define SERDES6G(x)	(SERDES1G_MAX + 1 + (x))
 #define SERDES6G_MAX	SERDES6G(2)
-#define SERDES_MAX	SERDES6G_MAX
+#define SERDES_MAX	(SERDES6G_MAX + 1)
 
 #endif
-- 
2.7.4