linux-kernel - [PATCH v2 0/2] phy: ocelot-serdes: fix out-of-bounds read

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Message-ID: <cover.1539874459.git.gustavo@embeddedor.com>
Date:   Thu, 18 Oct 2018 17:05:54 +0200
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     linux-kernel@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, Kishon Vijay Abraham I <kishon@...com>,
        Quentin Schulz <quentin.schulz@...tlin.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH v2 0/2] phy: ocelot-serdes: fix out-of-bounds read

This patchset aims to fix an out-of-bounds bug in
the phy-ocelot-serdes driver.

Currently, there is an out-of-bounds read on array ctrl->phys,
once variable i reaches the maximum array size of SERDES_MAX
in the for loop.

Quentin Schulz pointed out that SERDES_MAX is a valid value to
index ctrl->phys. So, I updated SERDES_MAX to be SERDES6G_MAX + 1
in include/dt-bindings/phy/phy-ocelot-serdes.h.

Then I changed the condition in the for loop from
i <= SERDES_MAX to i < SERDES_MAX in order to
complete the fix.

The reason I'm sending this fix as series is because
checkpatch reported an error when I first tried to
integrate the whole solution into a singe patch. So,
changes to dt-bindings should be sent as a separate
patch.

Changes in v2:
 - Send the whole series to Kishon Vijay Abraham I, so it
   can be taken into the PHY tree.
 - Add Quentin's Reviewed-by to commit log in both patches.

Thanks!

Gustavo A. R. Silva (2):
  dt-bindings: phy: Update SERDES_MAX to be SERDES_MAX + 1
  phy: ocelot-serdes: fix out-of-bounds read

 drivers/phy/mscc/phy-ocelot-serdes.c        | 4 ++--
 include/dt-bindings/phy/phy-ocelot-serdes.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

-- 
2.7.4