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

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@bootlin.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.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


  reply	other threads:[~2018-10-08 22:21 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-08 22:20 [PATCH 0/2] phy: ocelot-serdes: fix out-of-bounds bug Gustavo A. R. Silva
2018-10-08 22:21 ` Gustavo A. R. Silva [this message]
2018-10-09  7:27   ` [PATCH 1/2] dt-bindings: phy: Update SERDES_MAX to be SERDES_MAX + 1 Quentin Schulz
2018-10-16  8:44     ` Gustavo A. R. Silva
2018-10-17 15:09       ` Rob Herring
2018-10-17 15:19         ` Gustavo A. R. Silva
2018-10-17 15:23         ` Rob Herring
2018-10-17 15:45           ` Gustavo A. R. Silva
2018-10-08 22:22 ` [PATCH 2/2] phy: ocelot-serdes: fix out-of-bounds read Gustavo A. R. Silva
2018-10-09  7:28   ` Quentin Schulz
2018-10-16  8:46     ` Gustavo A. R. Silva
2018-10-16  8:48       ` Kishon Vijay Abraham I
2018-10-17 15:37         ` Gustavo A. R. Silva
2018-11-12  8:27           ` Kishon Vijay Abraham I
2018-10-09  7:28 ` [PATCH 0/2] phy: ocelot-serdes: fix out-of-bounds bug Quentin Schulz
2018-10-09 14:13   ` Gustavo A. R. Silva

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