linux-kernel - Re: [PATCH v3 0/2] phy: ocelot-serdes: fix out-of-bounds read

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Date:   Mon, 22 Oct 2018 19:27:47 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     gustavo@...eddedor.com
Cc:     linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        mark.rutland@....com, devicetree@...r.kernel.org, kishon@...com,
        quentin.schulz@...tlin.com, netdev@...r.kernel.org
Subject: Re: [PATCH v3 0/2] phy: ocelot-serdes: fix out-of-bounds read

From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Date: Fri, 19 Oct 2018 11:18:43 +0200

> 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.
> 
> Thanks!
> 
> Changes in v3:
>  - Post the series to netdev, so Dave can take it.
> 
> 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.

Series applied.